particle accelerators

Summary

Summary: Devices which accelerate electrically charged atomic or subatomic particles, such as electrons, protons or ions, to high velocities so they have high kinetic energy.

Top Publications

  1. ncbi Charged particles in radiation oncology
    Marco Durante
    Gesellschaft fur Schwerionenforschung GSI, Helmholtzzentrum für Schwerionenforschung, Biophysics Department, Plackstrasse 1, Darmstadt, Germany
    Nat Rev Clin Oncol 7:37-43. 2010
  2. ncbi A focused scanning vertical beam for charged particle irradiation of living cells with single counted particles
    Michael J Merchant
    Ion Beam Centre, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
    Radiat Res 178:182-90. 2012
  3. ncbi Treatment planning and delivery of IMRT using 6 and 18MV photon beams without flattening filter
    Sotirios Stathakis
    Department of Radiation Oncology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
    Appl Radiat Isot 67:1629-37. 2009
  4. ncbi Flattening filter free beams in SBRT and IMRT: dosimetric assessment of peripheral doses
    Gabriele Kragl
    Department of Radiotherapy, Div Medical Radiation Physics, Medical University of Vienna, Austria
    Z Med Phys 21:91-101. 2011
  5. ncbi Beam properties and stability of a flattening-filter free 7 MV beam-an overview
    Yvonne Dzierma
    Department of Radiation Oncology, Saarland University Medical Center, Saarland, Germany
    Med Phys 39:2595-602. 2012
  6. ncbi Out-of-field photon and neutron dose equivalents from step-and-shoot intensity-modulated radiation therapy
    Stephen F Kry
    Department of Radiation Physics, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
    Int J Radiat Oncol Biol Phys 62:1204-16. 2005
  7. ncbi Lowering whole-body radiation doses in pediatric intensity-modulated radiotherapy through the use of unflattened photon beams
    Jason Cashmore
    University Hospital Birmingham, Edgbaston, Birmingham, UK
    Int J Radiat Oncol Biol Phys 80:1220-7. 2011
  8. ncbi Targeted irradiation of Mammalian cells using a heavy-ion microprobe
    Markus Heiss
    Department of Materials Research, Gesellschaft fur Schwerionenforschung, 64291 Darmstadt, Germany
    Radiat Res 165:231-9. 2006
  9. ncbi A planning comparison of dynamic IMRT for different collimator leaf thicknesses with helical tomotherapy and RapidArc for prostate and head and neck tumors
    Vesna Jacob
    Department of Radiotherapy und Radiologic Oncology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
    Strahlenther Onkol 186:502-10. 2010
  10. ncbi 6 MV dosimetric characterization of the 160 MLC, the new Siemens multileaf collimator
    Martin B Tacke
    Department of Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, D 69120 Heidelberg, Germany
    Med Phys 35:1634-42. 2008

Detail Information

Publications239 found, 100 shown here

  1. ncbi Charged particles in radiation oncology
    Marco Durante
    Gesellschaft fur Schwerionenforschung GSI, Helmholtzzentrum für Schwerionenforschung, Biophysics Department, Plackstrasse 1, Darmstadt, Germany
    Nat Rev Clin Oncol 7:37-43. 2010
    ..This Review considers the present clinical results in the field, and identifies and discusses the research questions that have resulted with this technique...
  2. ncbi A focused scanning vertical beam for charged particle irradiation of living cells with single counted particles
    Michael J Merchant
    Ion Beam Centre, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
    Radiat Res 178:182-90. 2012
    ..We discuss future commissioning steps necessary to achieve submicron targeting accuracy with this beamline...
  3. ncbi Treatment planning and delivery of IMRT using 6 and 18MV photon beams without flattening filter
    Sotirios Stathakis
    Department of Radiation Oncology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
    Appl Radiat Isot 67:1629-37. 2009
    ..There was however a significant decrease in the number of monitor units required for unflattened beam treatment plans due to the increase in linac output-approximately two times and four times higher for the 6 and 18 MV, respectively...
  4. ncbi Flattening filter free beams in SBRT and IMRT: dosimetric assessment of peripheral doses
    Gabriele Kragl
    Department of Radiotherapy, Div Medical Radiation Physics, Medical University of Vienna, Austria
    Z Med Phys 21:91-101. 2011
    ..The aim of the present study was to determine the impact of unflattened beams on peripheral dose for advanced treatment techniques with a large number of MUs...
  5. ncbi Beam properties and stability of a flattening-filter free 7 MV beam-an overview
    Yvonne Dzierma
    Department of Radiation Oncology, Saarland University Medical Center, Saarland, Germany
    Med Phys 39:2595-602. 2012
    ....
  6. ncbi Out-of-field photon and neutron dose equivalents from step-and-shoot intensity-modulated radiation therapy
    Stephen F Kry
    Department of Radiation Physics, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
    Int J Radiat Oncol Biol Phys 62:1204-16. 2005
    ..intensity-modulated radiation therapy [IMRT]) at different treatment energies and delivered by different accelerators...
  7. ncbi Lowering whole-body radiation doses in pediatric intensity-modulated radiotherapy through the use of unflattened photon beams
    Jason Cashmore
    University Hospital Birmingham, Edgbaston, Birmingham, UK
    Int J Radiat Oncol Biol Phys 80:1220-7. 2011
    ..Removal of the flattening filter offers a simple way of reducing head leakage, and it may be possible to generate equivalent IMRT plans and to deliver these on a standard linear accelerator operating in unflattened mode...
  8. ncbi Targeted irradiation of Mammalian cells using a heavy-ion microprobe
    Markus Heiss
    Department of Materials Research, Gesellschaft fur Schwerionenforschung, 64291 Darmstadt, Germany
    Radiat Res 165:231-9. 2006
    ....
  9. ncbi A planning comparison of dynamic IMRT for different collimator leaf thicknesses with helical tomotherapy and RapidArc for prostate and head and neck tumors
    Vesna Jacob
    Department of Radiotherapy und Radiologic Oncology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
    Strahlenther Onkol 186:502-10. 2010
    ..5 mm, 5 mm, and 10 mm). The influence of the different planning techniques on the coverage of planning volume and sparing of organs at risk (OARs) was investigated...
  10. ncbi 6 MV dosimetric characterization of the 160 MLC, the new Siemens multileaf collimator
    Martin B Tacke
    Department of Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, D 69120 Heidelberg, Germany
    Med Phys 35:1634-42. 2008
    ..The experimental results presented in this article indicate that the dosimetric characteristics of the 160 MLC are capable of improving the quality of dose delivery with respect to precision and dose conformity...
  11. ncbi Reduced neutron production through use of a flattening-filter-free accelerator
    Stephen F Kry
    Department of Radiation Physics, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
    Int J Radiat Oncol Biol Phys 68:1260-4. 2007
    ..To measure and compare neutron fluence around an accelerator operating at 18 MV, both with the flattening filter present (FF mode) and absent (flattening-filter-free [FFF] mode)...
  12. ncbi Flattening filter-free linac improves treatment delivery efficiency in stereotactic body radiation therapy
    Brendan M Prendergast
    Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, AL 35249, USA
    J Appl Clin Med Phys 14:4126. 2013
    ..In addition, treatment with a FFF linac is associated with less physician-ordered image guidance, which contributes to further improvement in treatment delivery efficiency...
  13. ncbi The characterization of unflattened photon beams from a 6 MV linear accelerator
    Jason Cashmore
    University Hospital Birmingham NHS Foundation Trust, UK
    Phys Med Biol 53:1933-46. 2008
    ....
  14. ncbi Dependence of cell survival on instantaneous dose rate of a linear accelerator
    Brita Singers Sørensen
    Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
    Radiother Oncol 101:223-5. 2011
    ..This leads to the question of whether there may be a radiobiological consequence. The present study investigates the radiobiological effect of this high instantaneous dose rate on two cell lines...
  15. ncbi Incorporation of realistic delivery limitations into dynamic MLC treatment delivery
    Dale W Litzenberg
    Department of Radiation Oncology, University of Michigan Medical Center, Ann Arbor 48109 0010, USA
    Med Phys 29:810-20. 2002
    ....
  16. ncbi Radiation therapy with unflattened photon beams: dosimetric accuracy of advanced dose calculation algorithms
    Gabriele Kragl
    Division of Medical Radiation Physics, Department of Radiotherapy, Medical University of Vienna AKH Wien, Austria
    Radiother Oncol 100:417-23. 2011
    ..To compare the dosimetric accuracy of advanced dose calculation algorithms for flattened (FF) and unflattened (FFF) photon beams...
  17. ncbi Accelerator mass spectrometry for quantitative in vivo tracing
    John S Vogel
    Lawrence Livermore National Laboratory, University of California, Livermore, CA 94551, USA
    Biotechniques . 2005
    ..Absorption, metabolism, distribution, binding, and elimination are all quantifiable with high precision after appropriate sample definition...
  18. ncbi Human in vivo dose-response to controlled, low-dose low linear energy transfer ionizing radiation exposure
    Zelanna Goldberg
    Department of Radiation Oncology, University of California Davis Cancer Center, Sacramento, 95817, USA
    Clin Cancer Res 12:3723-9. 2006
    ....
  19. ncbi The Columbia University single-ion microbeam
    G Randers-Pehrson
    Center for Radiological Research, Radiological Research Accelerator Facility, Columbia University, Irvington, New York 10533, USA
    Radiat Res 156:210-4. 2001
    ..Various contributions to targeting and positioning precision are discussed along with our plans for future developments. Beam time for outside users is often available (see www.raraf.org)...
  20. ncbi Task Group 142 report: quality assurance of medical accelerators
    Eric E Klein
    Washington University, St Louis, Missouri, USA
    Med Phys 36:4197-212. 2009
    ....
  21. ncbi Dosimetric evaluation of a 2D pixel ionization chamber for implementation in clinical routine
    J Herzen
    Department of Radiotherapy and Radio Oncology, Center for Diagnostic Imaging and Image Guided Therapy, Radiological Physics, University Medical Center Hamburg Eppendorf, Martinistrasse 52, DE 20251 Hamburg, Germany
    Phys Med Biol 52:1197-208. 2007
    ..From these investigations it can be concluded that the detector is a suitable device for quality assurance and 2D dose verifications...
  22. ncbi Spatial resolution of 2D ionization chamber arrays for IMRT dose verification: single-detector size and sampling step width
    Björn Poppe
    Medical Radiation Physics Working Group, University of Oldenburg, Germany
    Phys Med Biol 52:2921-35. 2007
    ..The insights obtained are also applied in the discussion of other available two-dimensional detector arrays...
  23. ncbi Analysis of quality control data of eight modern radiotherapy linear accelerators: the short- and long-term behaviours of the outputs and the reproducibility of quality control measurements
    Mika Kapanen
    Radiation and Nuclear Safety Authority STUK, Laippatie 4, 00881 Helsinki, Finland
    Phys Med Biol 51:3581-92. 2006
    ..5%. The proposed empirical model fitting of QC data facilitates the recognition of erroneous QC measurements and abnormal output behaviour, caused by malfunctions, offering a tool to improve dose control...
  24. ncbi Stereotactic radiosurgery XVI: Isodosimetric comparison of photon stereotactic radiosurgery techniques (gamma knife vs. micromultileaf collimator linear accelerator) for acoustic neuroma--and potential clinical importance
    Julian Richard Perks
    Department of Radiotherapy, St Bartholomew s Hospital, London, England, United Kingdom
    Int J Radiat Oncol Biol Phys 57:1450-9. 2003
    ..Since then, the introduction of micromultileaf collimator technology has improved the conformity of the linear accelerator method such that the isodosimetric differences between the two techniques have narrowed...
  25. ncbi Laser electron accelerators for radiation medicine: a feasibility study
    Charles Chiu
    Department of Physics, University of Texas at Austin, Austin, Texas 78712 1081, USA
    Med Phys 31:2042-52. 2004
    ..This enables a repetition rate of approximately 100 Hz or more using existing laser technology, and thus dose rates (several Gy/min) in the range required for medical radiation applications...
  26. ncbi Patterns of patient movement during frameless image-guided radiosurgery
    Martin J Murphy
    Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
    Int J Radiat Oncol Biol Phys 55:1400-8. 2003
    ..We have analyzed the target position records for all of these cases to assess the frequency, magnitude, and case-by-case patterns of patient movement...
  27. ncbi A preliminary report of intraoperative radiotherapy (IORT) in limited-stage breast cancers that are conservatively treated
    U Veronesi
    Radiotherapy Division, Istituto Europeo di Oncologia, University of Milan, Via G Ripamonti 435, 20141 Milan, Italy
    Eur J Cancer 37:2178-83. 2001
    ..However, a longer follow-up is needed for a better evaluation of the possible late side-effects...
  28. ncbi Commissioning and quality assurance of RapidArc radiotherapy delivery system
    C Clifton Ling
    Varian Medical Systems, Palo Alto, CA, USA
    Int J Radiat Oncol Biol Phys 72:575-81. 2008
    ..We developed RapidArc system commissioning and quality assurance (QA) procedures...
  29. ncbi Experimental determination of peripheral photon dose components for different IMRT techniques and linear accelerators
    Tilo Wiezorek
    University Hospital Jena, Clinic for Radiotherapy, Jena, Germany
    Z Med Phys 19:120-8. 2009
    ..To quantify the relative peripheral photon doses (PD) to healthy tissues outside the treated region for different IMRT technologies and linac head designs...
  30. ncbi Advanced treatment planning methods for efficient radiation therapy with laser accelerated proton and ion beams
    Stefan Schell
    Department of Radiation Oncology, Technische Universitat Munchen, Klinikum rechts der Isar, Ismaninger Str 22, 81675 Munchen, Germany
    Med Phys 37:5330-40. 2010
    ..Trying to use laser accelerated particles in a conventional way such as spot scanning leads to long treatment times and a high amount of secondary radiation produced when blocking unwanted particles...
  31. ncbi Investigating treatment dose error due to beam attenuation by a carbon fiber tabletop
    W Kenji Myint
    Ottawa Hospital Regional Cancer Centre, Ottawa, Ontario, Canada
    J Appl Clin Med Phys 7:21-7. 2006
    ..5% following the periodic nature of the support structure. Based on these findings, we propose the routine incorporation of the treatment tabletop into patient treatment planning dose calculations...
  32. ncbi Quantitating isotopic molecular labels with accelerator mass spectrometry
    John S Vogel
    Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California, USA
    Methods Enzymol 402:402-22. 2005
    ..AMS is available from several facilities that offer services and new spectrometers that are affordable. Detailed examples of designing AMS studies are provided, and the methods of analyzing AMS data are outlined...
  33. ncbi Accelerator mass spectrometry for biomedical research
    Karen Brown
    Lawrence Livermore National Laboratory, Livermore, California, USA
    Methods Enzymol 402:423-43. 2005
    ....
  34. ncbi Characterization of a commercial multileaf collimator used for intensity modulated radiation therapy
    D A Low
    Radiation Oncology Center, Mallinckrodt Institute of Radiology, St. Louis, Missouri 63110, USA
    Med Phys 28:752-6. 2001
    ....
  35. pmc Detection of Adriamycin-DNA adducts by accelerator mass spectrometry at clinically relevant Adriamycin concentrations
    Kate E Coldwell
    Department of Biochemistry, La Trobe University, Bundoora, Victoria 3086, Australia
    Nucleic Acids Res 36:e100. 2008
    ..This method has been shown to be highly reproducible for the measurement of Adriamycin-DNA adducts in tumour cells in culture and can now be applied to the detection of these adducts in human tissues...
  36. ncbi A performance comparison of flat-panel imager-based MV and kV cone-beam CT
    B A Groh
    Deutsches Krebsforschungszentrum, Abteilung Medizinische Physik, Heidelberg, Germany
    Med Phys 29:967-75. 2002
    ..Furthermore, kV CBCT with an FPI offers the potential of combined volumetric and radiographic/fluoroscopic imaging using the same device...
  37. ncbi Microirradiation of cells with energetic heavy ions
    A Hauptner
    Physics Department E12, Technische Universitat Munchen, 85748 Garching, Germany
    Radiat Environ Biophys 42:237-45. 2004
    ..In spite of single ion irradiation, we frequently observed split fluorescence foci which might be explained by small-scale chromatin movements...
  38. pmc Expanding the question-answering potential of single-cell microbeams at RARAF, USA
    Alan Bigelow
    Center for Radiological Research, Columbia University, Irvington, New York 10533 0021, USA
    J Radiat Res 50:A21-8. 2009
    ..Additionally, an update on the status of the other biology oriented microbeams in the Americas is provided...
  39. ncbi Intraoperative radiation therapy in liver tissue in a pig model: monitoring with dual-modality PET/CT
    Gerald Antoch
    Department of Diagnostic and Interventional Radiology, University Hospital Essen, Germany
    Radiology 230:753-60. 2004
    ..To assess, in a pig model, the value of dual-modality positron emission tomography (PET)/computed tomography (CT) for monitoring radiation therapy...
  40. ncbi Accelerator beam data commissioning equipment and procedures: report of the TG-106 of the Therapy Physics Committee of the AAPM
    Indra J Das
    Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
    Med Phys 35:4186-215. 2008
    ..By combining practical experience with theoretical discussion, this document sets a new standard for beam data commissioning...
  41. ncbi Image-guided radiotherapy for prostate cancer by CT-linear accelerator combination: prostate movements and dosimetric considerations
    James R Wong
    Carol G Simon Cancer Center, Morristown Memorial Hospital Atlantic Health System, Morristown, NJ 07960, USA
    Int J Radiat Oncol Biol Phys 61:561-9. 2005
    ..Dosimetric calculations were performed to evaluate the amount of discrepancy of dose to the target if no correction was done for prostate movement...
  42. ncbi Big physics, small doses: the use of AMS and PET in human microdosing of development drugs
    Graham Lappin
    Xceleron Ltd, York Biocentre, Innovation Way, Heslington, York YO10 5NY, UK
    Nat Rev Drug Discov 2:233-40. 2003
    ..Microdosing allows safer human studies as well as reducing the use of animals in preclinical toxicology...
  43. ncbi Intensity-modulated radiation therapy (IMRT) dosimetry of the head and neck: a comparison of treatment plans using linear accelerator-based IMRT and helical tomotherapy
    Ke Sheng
    Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
    Int J Radiat Oncol Biol Phys 65:917-23. 2006
    ..To quantify the dosimetric difference, we compared linac-based and helical tomotherapy-based treatment plans for IMRT of the oropharynx...
  44. ncbi On-line quality assurance of rotational radiotherapy treatment delivery by means of a 2D ion chamber array and the Octavius phantom
    Ann Van Esch
    Clinique Ste Elisabeth, Place L Godin 15, 5000 Namur, Belgium
    Med Phys 34:3825-37. 2007
    ..Quality control of TomoTherapy patients was reduced to a total of approximately 25 min per patient...
  45. ncbi A virtual-accelerator-based verification of a Monte Carlo dose calculation algorithm for electron beam treatment planning in homogeneous phantoms
    Elinore Wieslander
    Department of Radiation Physics, Lund University Hospital, SE 221 85 Lund, Sweden
    Phys Med Biol 51:1533-44. 2006
    ..The exception is 6 MeV where there are slightly larger deviations. The concept of the virtual accelerator is shown to be feasible and has the potential to be a powerful tool for vendors and users...
  46. ncbi Dosimetric effects on the penumbra region of irregular multi-leaf collimated fields
    James C L Chow
    Medical Physics Department, Grand River Regional Cancer Center, Grand River Hospital, PO Box 9056, 835 King Street West, Kitchener, Ontario N2G 1G3, Canada
    Phys Med Biol 51:N31-8. 2006
    ..4f, which considered the two aforementioned effects, made an improvement, it still underestimated the dose by 25% compared to the measurement. For the in-line profiles, both versions estimated the penumbra width well...
  47. ncbi Monte Carlo correction factors for a Farmer 0.6 cm3 ion chamber dose measurement in the build-up region of the 6 MV clinical beam
    J Pena
    Departamento de Física de Partículas, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
    Phys Med Biol 51:1523-32. 2006
    ..The corrected percentage depth dose (PDD) agrees within 2% with that measured using the NACP 02 plane-parallel ion chamber in the build-up region at depths greater than 0.4 cm, where the Farmer chamber wall reaches the phantom surface...
  48. ncbi Photon-beam subsource sensitivity to the initial electron-beam parameters
    Michael K Fix
    Department of Radiation Oncology, Virginia Commonwealth University, PO Box 980058, Richmond, Virginia 23298, USA
    Med Phys 32:1164-75. 2005
    ....
  49. ncbi Modeling skin collimation using the electron pencil beam redefinition algorithm
    Pai Chun M Chi
    Department of Radiation Physics, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA
    Med Phys 32:3409-18. 2005
    ..To further improve the accuracy of the PBRA in regions having significant electrons scattered from the edge of the skin collimation would require transporting the electrons through the lead skin collimation near its edges...
  50. ncbi Final Aperture Superposition Technique applied to fast calculation of electron output factors and depth dose curves
    B A Faddegon
    Department of Radiation Oncology, UCSF, San Francisco, California 94143 1708, USA
    Med Phys 32:3286-94. 2005
    ..5% exceeded the statistical precision of the calculation by four standard deviations. This occurred at 18 MeV for the 2.5 x 2.5 cm2 field. The differences are due to the method used to account for the collimator effect...
  51. ncbi Dosimetric verification of IMRT treatment planning using Monte Carlo simulations for prostate cancer
    J Yang
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 50:869-78. 2005
    ..These results suggest that heterogeneity correction should be used in dose calculation for prostate cancer with non-coplanar beam arrangements...
  52. ncbi Microionization chamber for reference dosimetry in IMRT verification: clinical implications on OAR dosimetric errors
    Francisco Sánchez-Doblado
    Hospital Universitario Virgen Macarena, Radiofísica, Sevilla, Spain
    Phys Med Biol 50:959-70. 2005
    ..The dose ratio was calculated for the microIC located at the isocentre within the OARs for both clinical cases. The clinical impact of the calculated dose error was found to be negligible for the studied IMRT treatments...
  53. ncbi A novel dose uncertainty model and its application for dose verification
    Hosang Jin
    Department of Nuclear and Radiological Engineering, University of Florida, Gainesville, Florida 32610, USA
    Med Phys 32:1747-56. 2005
    ..The histogram provides additional information on superiority of a treatment plan in terms of uncertainty. In summary, the uncertainty model provides the dose comparison tool as well as the evaluation tool of a treatment planning system...
  54. ncbi Beam modeling and verification of a photon beam multisource model
    Anders Ahnesjö
    Nucletron Scandinavia AB, Box 1704, 751 47 Uppsala, Sweden
    Med Phys 32:1722-37. 2005
    ..Internal, motorized wedges did yield slightly larger errors than external wedges. These results reflect the increased complexity, both experimentally and computationally, when wedges are used compared to open beams...
  55. ncbi Assigning nonelastic nuclear interaction cross sections to Hounsfield units for Monte Carlo treatment planning of proton beams
    Hugo Palmans
    Radiation Dosimetry Team, National Physical Laboratory, Teddington, Middlesex, UK
    Phys Med Biol 50:991-1000. 2005
    ..Monte Carlo simulations in slab geometries with tissue materials for 200 MeV protons show similar effects, but when both contributions are scaled correctly the errors are not larger than 0.5% in the situations investigated here...
  56. ncbi Effect of beamlet step-size on IMRT plan quality
    Guowei Zhang
    Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
    Med Phys 32:3448-54. 2005
    ..0, 7.6, 8.7, and 9.1 dose%/mm achieved for beamlet step sizes of 10, 5, 2, and 1 mm, respectively...
  57. ncbi MCNPX simulation of a multileaf collimator
    Falk Pönisch
    Radiation Physics, University of Texas, M D Anderson Cancer Center 1515 Holcombe Blvd, Unit 94, Houston, Texas 77030, USA
    Med Phys 33:402-4. 2006
    ..The good agreement between the Monte Carlo simulations and measurements showed that our model is accurate. Consequently, the benchmarks provided by our study can be used in future Monte Carlo studies...
  58. ncbi Dynamic conformal arc therapy: transmitted signal in vivo dosimetry
    Angelo Piermattei
    Istituto di Fisica, Universita Cattolica del S Cuore, Roma, Italy
    Med Phys 35:1830-9. 2008
    ..The method has been applied on the DCAT obtaining a more extensive monitoring of possible systematic errors, the effect of which can invalidate the current therapy which uses a few high-dose fractions...
  59. ncbi Prototyping a large field size IORT applicator for a mobile linear accelerator
    Rogier W J Janssen
    Catharina Hospital Eindhoven, PO Box 1350, 5602 ZA, Eindhoven, The Netherlands
    Phys Med Biol 53:2089-102. 2008
    ..In addition, the measurements agreed well with the MC simulations, typically within 2%/1 mm...
  60. ncbi Initial beam size study for passive scatter proton therapy. II. Changes in delivered depth dose profiles
    Jerimy C Polf
    Department of Radiation Physics, University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA
    Med Phys 34:4219-22. 2007
    ..Our results indicate that the width of the delivered SOBP decreases as the size of the initial beam increases...
  61. ncbi Initial beam size study for passive scatter proton therapy. I. Monte Carlo verification
    Jerimy C Polf
    Department of Radiation Physics, University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA
    Med Phys 34:4213-8. 2007
    ....
  62. ncbi Effect of electron beam obliquity on lateral buildup ratio: a Monte Carlo dosimetry evaluation
    James C L Chow
    Department of Radiation Oncology, University of Toronto and Radiation Medicine Program, Princess Margaret Hospital, University Health Network, 610 University Avenue, Toronto, ON, M5G 2M9, Canada
    Phys Med Biol 52:3965-77. 2007
    ..A database of LBRs for oblique electron beams can be created using Monte Carlo simulation conveniently and is recommended when an oblique beam is used in electron radiotherapy...
  63. ncbi Shielding design for a laser-accelerated proton therapy system
    J Fan
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 52:3913-30. 2007
    ..It is shown that the two-layer shielding design with 10-12 cm thick polyethylene and 4 cm thick lead can effectively absorb the unwanted particles to meet the shielding requirements...
  64. ncbi Automatic determination of primary electron beam parameters in Monte Carlo simulation
    Javier Pena
    Departamento de Física de Partículas, Facultade de Fisica, Universidade de Santiago de Compostela, Spain
    Med Phys 34:1076-84. 2007
    ..These databases can also be used to characterize any accelerators of the same model from different sites...
  65. ncbi Estimation of the focal spot size and shape for a medical linear accelerator by Monte Carlo simulation
    Lilie L W Wang
    Department of Physics, Laurentian University, Sudbury, Ontario, Canada P3E 2C5
    Med Phys 34:485-8. 2007
    ..A simple method is proposed to estimate the size and the shape of a linac's focal spot from the measured dose profile data...
  66. ncbi Optimization of photon beam flatness for radiation therapy
    Jörgen Olofsson
    Department of Radiation Sciences Radiation Physics, Umea University, SE 901 87 Umea, Sweden
    Phys Med Biol 52:1735-46. 2007
    ....
  67. ncbi Monte Carlo simulations of dose near a nonradioactive gold seed
    James C L Chow
    Department of Radiation Oncology, University of Toronto and Radiation Medicine Program, Princess Margaret Hospital, 610 University Avenue, Toronto, ON N2G 1G3, Canada
    Med Phys 33:4614-21. 2006
    ..In this study, selected results from our simulation were compared to previous measurements using film dosimetry...
  68. ncbi Calculation of 10 MV x-ray spectra emitted by a medical linear accelerator using the BFGS quasi-Newton method
    T Shimozato
    Hamamatsu University School of Medicine, University Hospital, 1 20 1 Handayama, Hamamatsu, Shizuoka 431 3192, Japan
    Phys Med Biol 52:515-23. 2007
    ..The differences in the measured and calculated values were less than +/-1.0% for a broad region from the shallow part near the surface to deep parts of up to 25 cm in the water phantom...
  69. ncbi Determination of the recombination correction factor kS for some specific plane-parallel and cylindrical ionization chambers in pulsed photon and electron beams
    G Bruggmoser
    Univ Klinikum Freiburg, Klinik f Strahlenheilkunde, FB Med Physik, Freiburg, Germany
    Phys Med Biol 52:N35-50. 2007
    ....
  70. ncbi Application of the electron pencil beam redefinition algorithm to electron arc therapy
    Pai Chun M Chi
    Department of Radiation Physics, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA
    Med Phys 33:2369-83. 2006
    ....
  71. ncbi Ultra-thin TLDs for skin dose determination in high energy photon beams
    S Stathakis
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 51:3549-67. 2006
    ..Knowing the dose received at the surface of the patient can lead to prediction of skin reactions helping with the design of new treatment techniques and alternative dose fractionation schemes...
  72. ncbi Perturbation factors for cylindrical ionization chambers in proton beams. Part I: corrections for gradients
    Hugo Palmans
    National Physical Laboratory, Radiation Dosimetry Team, Hampton Road, Teddington, Middx, TW11 0LW, UK
    Phys Med Biol 51:3483-501. 2006
    ..This is illustrated by successfully applying it to depth-dose measurements with cylindrical ionization chambers taken from the literature...
  73. ncbi Monte Carlo simulation of the photon beam characteristics from medical linear accelerators
    H K Kim
    National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, 139 706, Korea
    Radiat Prot Dosimetry 119:510-3. 2006
    ..The calculations agree to within 2% of the measured profiles within the 100-50% dose level. It has been found that the MCNPX code is an effective tool for simulating the clinical photon beam...
  74. ncbi Density heterogeneities and the influence of multiple Coulomb and nuclear scatterings on the Bragg peak distal edge of proton therapy beams
    Gabriel O Sawakuchi
    Department of Radiation Physics, Unit 94, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
    Phys Med Biol 53:4605-19. 2008
    ..This method is tested for three clinical setups of a voxelized model of a human head based on computer tomography data. Results are within 3% of the distal fall-off values obtained using Monte Carlo simulations...
  75. ncbi Monte Carlo based modulated electron beam treatment planning using a few-leaf electron collimator--feasibility study
    Khalid Al-Yahya
    Medical Physics Unit, McGill University, 1650 Cedar Avenue, Montreal H3G 1A9, Canada
    Phys Med Biol 50:847-57. 2005
    ..Estimates of delivery times are made and show that a full treatment fraction can be kept to 15 min or less...
  76. ncbi Head-and-neck IMRT treatments assessed with a Monte Carlo dose calculation engine
    J Seco
    Joint Department of Physics, Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, Fulham Road, London SW3 6JJ, UK
    Phys Med Biol 50:817-30. 2005
    ..This is possibly due to the large air-cavity (the larynx of the patient) situated in the centre of the primary PTV and the approximations present in the dose calculation...
  77. ncbi The use of film dosimetry of the penumbra region to improve the accuracy of intensity modulated radiotherapy
    Mark R Arnfield
    Department of Radiation Oncology, McKay Dee Hospital Center, Ogden, Utah 84403, USA
    Med Phys 32:12-8. 2005
    ..These results show that accurately measuring the beam penumbrae improves the accuracy of the dose distributions predicted by the treatment planning system and thus is important when commissioning beam models used for IMRT...
  78. ncbi Geometric leaf placement strategies
    J D Fenwick
    Department of Physics, Clatterbridge, Centre for Oncology, Clatterbridge Road, Bebington, Wirral CH63 4JY, UK
    Phys Med Biol 49:1505-19. 2004
    ....
  79. ncbi Correction for dose-response variations in a scanning liquid ion chamber EPID as a function of linac gantry angle
    P W Chin
    Department of Medical Physics, Velindre Cancer Centre, Cardiff CF14 2TL, Wales, UK
    Phys Med Biol 49:N93-103. 2004
    ..Since the artefacts compromise both accurate dosimetry and image quality, their successful removal should benefit a broad range of SLIC EPID applications...
  80. ncbi Monte Carlo modelling of external radiotherapy photon beams
    Frank Verhaegen
    Medical Physics Unit, McGill University, 1650 Cedar Av Montreal, Quebec, H3G1A4, Canada
    Phys Med Biol 48:R107-64. 2003
    ..The review will be focused mainly on Monte Carlo modelling of linear accelerator treatment heads but sections will also be devoted to kilovoltage x-ray units and 60Co teletherapy sources...
  81. ncbi Shielding analysis of the Microtron MT-25 bunker using the MCNP-4C code and NCRP Report 51
    A O Casanova
    Instituto Superior de Tecnologías y Ciencias Aplicadas InSTEC, Ave Salvador Allende y Luaces, Quinta de los Molinos, Habana 10600, A P 6163, InSTEC, La Habana, Cuba
    Radiat Prot Dosimetry 109:189-95. 2004
    ..The walls and ceiling thicknesses are estimated with dose constraints of 0.5 and 20 mSv y(-1), respectively, and an area occupancy factor of 1/16. Both results are compared and a preliminary bunker design is shown...
  82. ncbi Online compensation for target motion with scanned particle beams: simulation environment
    Qiang Li
    Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou 730000, People s Republic of China
    Phys Med Biol 49:3029-46. 2004
    ..It contributes a substantial basis for the experimental research on the irradiation of moving target volumes with scanned ion beams at GSI which will be presented in upcoming papers...
  83. ncbi Matchline dosimetry in step and shoot IMRT fields: a film study
    P Tangboonduangjit
    Department of Engineering Physics, University of Wollongong, NSW, Australia
    Phys Med Biol 49:N287-92. 2004
    ..In conclusion, relative doses measured by radiographic and radiochromic films agree well with IC4 within +/-2%...
  84. ncbi Radiation-induced statistical uncertainty in the threshold voltage measurement of MOSFET dosimeters
    Chris Benson
    Engineering Department, Lancaster University, Bailrigg, Lancaster, Lancashire LA1 4YR, UK
    Phys Med Biol 49:3145-59. 2004
    ..Inter-device uncertainty has been investigated in a group of 40 devices, and preliminary evidence for kurtosis and skewness in the distributions for devices without external bias has been observed...
  85. ncbi Calculation of conversion coefficients for clinical photon spectra using the MCNP code
    M A F Lima
    PEN COPPE CT UFRJ, Universidade Federal do Rio de Janeiro, 21945 970 Ilha do Fundão, Caixa Postal 68509, Rio de Janeiro, RJ, Brazil
    Radiat Prot Dosimetry 111:9-12. 2004
    ..The conversion coefficients calculated for real clinic spectra transmitted through walls of concrete of 1, 1.5 and 2 m thick, are in the range of 1.06-1.12 Sv Gy(-1)...
  86. ncbi Interpolation and extrapolation of dose measurements with different detector sizes to improve the spatial resolution of radiotherapy dosimetry as demonstrated for helical tomotherapy
    Andrea McNiven
    Department of Medical Biophysics, University of Western Ontario and London Regional Cancer Centre, London, ON, N6A 4L6, Canada
    Phys Med Biol 49:3665-74. 2004
    ..This was done for five FBTs and demonstrated a sharp fall off in dose when the FBT decreased below 8 mm. Similar techniques can be applied to other IMRT techniques to improve the characterization of various beam parameters...
  87. ncbi Two-dimensional and quasi-three-dimensional dosimetry of hadron and photon beams with the Magic Cube and the Pixel Ionization Chamber
    R Cirio
    Experimental Physics Department of the University and Istituto Nazionale di Fisica Nucleare, Via P Giuria 1, I 10125 Torino, Italy
    Phys Med Biol 49:3713-24. 2004
    ..The PXC has been used to verify dynamic intensity-modulated radiotherapy for head-and-neck and breast cancers...
  88. ncbi Reference photon dosimetry data and reference phase space data for the 6 MV photon beam from varian clinac 2100 series linear accelerators
    Sang Hyun Cho
    Department of Radiation Physics, The University of Texas M D Anderson Cancer Center, Houston, Texas 77030, USA
    Med Phys 32:137-48. 2005
    ..g., 1% or 1 mm for depth dose). A complete set of the RPDD and RPSD from the current study is available from the RPC website (http://rpc.mdanderson.org) or via mass storage media such as DVD or CD-ROM upon request...
  89. ncbi Influence of initial electron beam parameters on Monte Carlo calculated absorbed dose distributions for radiotherapy photon beams
    Antonis Tzedakis
    University Hospital of Crete, Medical Physics Division, Stavrakia, Heraklion, Crete 71110, Greece
    Med Phys 31:907-13. 2004
    ..The suggested method of evaluating these crucial but often poorly specified parameters may be of value in the Monte Carlo simulation of linear accelerator photon beams...
  90. ncbi Integrating a MRI scanner with a 6 MV radiotherapy accelerator: dose deposition in a transverse magnetic field
    B W Raaymakers
    Department of Radiotherapy, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
    Phys Med Biol 49:4109-18. 2004
    ..5 T is affected, but the effect can be taken into account in a conventional treatment planning procedure. The impact of the altered dose deposition for clinical IMRT treatments is the topic of further research...
  91. ncbi The influence of beam model differences in the comparison of dose calculation algorithms for lung cancer treatment planning
    Indrin J Chetty
    Department of Radiation Oncology, The University of Michigan, Ann Arbor, MI 48109 0010, USA
    Phys Med Biol 50:801-15. 2005
    ..This may ultimately hinder our ability to accurately correlate dose with clinical outcome...
  92. ncbi Dosimetric features of linac head and phantom scattered radiation outside the clinical photon beam: experimental measurements and comparison with treatment planning system calculations
    L Cozzi
    Radiation Oncology Division, Medical Physics Unit, Istituto Oncologico della Svizzera Italiana, Ospedale S. Giovanni, 6504 Bellinzona, Switzerland
    Radiother Oncol 58:193-200. 2001
    ....
  93. ncbi Development of a Monte Carlo model for the Brainlab microMLC
    Jason Belec
    Medical Physics Department, McGill University Health Centre, McGill University, Montreal General Hospital, 1650 Cedar Avenue, Montreal, Quebec, H3G1A4, Canada
    Phys Med Biol 50:787-99. 2005
    ..Results show that Monte Carlo calculations agree with measured dose distributions to within 2% and/or 1 mm except for field size smaller than 1.2 cm diameter where agreement is within 5% due to uncertainties in measured output factors...
  94. ncbi Dosimetric assessment of the field abutment region in head and neck treatments using a multileaf collimator
    Khaled Abdel-Hakim
    Department of Radiology, Hamamatsu University School of Medicine, Handayama, Hamamatsu, Japan
    Strahlenther Onkol 179:312-9. 2003
    ..In this work, we evaluated the dose inhomogeneities at the match-plane in monoisocentric three-field head and neck setups, using MLC for field abutment...
  95. ncbi Intensity-modulated radiation therapy: overlapping co-axial modulated fields
    P Metcalfe
    Centre for Medical Radiation Physics, University of Wollongong, NSW, Australia
    Phys Med Biol 49:3629-37. 2004
    ..5 cGy in a modulated field at d(max). While the magnitude of the dose differences are small improved round end leaf modelling combined with a finer dose calculation grid may minimize the discrepancy between calculated and delivered dose...
  96. ncbi Response corrections for solid-state detectors in megavoltage photon dosimetry
    Z Yin
    School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
    Phys Med Biol 49:3691-702. 2004
    ..The model predicts the effect to within 1% for both energies offering a basis for the correction of diodes for use in routine dosimetry...
  97. ncbi Photonuclear dose calculations for high-energy photon beams from Siemens and Varian linacs
    Omar Chibani
    Department of Radiation Oncology, Massy Cancer Center, Virginia Commonwealth University, 401 College Street, Richmond, Virginia 23298, USA
    Med Phys 30:1990-2000. 2003
    ..1, 1.1, and 2.0% likelihood of fatal secondary cancer for a 70 Gy treatment delivered by the Siemens 18 MV, Varian 15 MV, and Varian 18 MV beams, respectively...
  98. ncbi Implementation of random set-up errors in Monte Carlo calculated dynamic IMRT treatment plans
    S Stapleton
    Department of Physics and Astronomy, University of Victoria, Victoria BC, Canada
    Phys Med Biol 50:429-39. 2005
    ..It also showed that accounting for the set-up errors could be essential for correct identification of the value and position of the hot spot...
  99. ncbi Algorithms for optimal sequencing of dynamic multileaf collimators
    Srijit Kamath
    Department of Computer and Information Science and Engineering, University of Florida, Gainesville, FL, USA
    Phys Med Biol 49:33-54. 2004
    ..Our analytical analysis shows that leaf sequencing based on unidirectional movement of the MLC leaves is as MU efficient as bi-directional movement of the MLC leaves...
  100. ncbi Comparison of build-up dose between Elekta and Varian linear accelerators for high-energy photon beams using radiochromic film and clinical implications for IMRT head and neck treatments
    L Paelinck
    Ghent University Hospital, De Pintelaan 185, B 9000 Gent, Belgium
    Phys Med Biol 50:413-28. 2005
    ....
  101. ncbi Establishment of technical prerequisites for cell irradiation experiments with laser-accelerated electrons
    E Beyreuther
    Forschungszentrum Dresden Rossendorf P O Box 510119, Bautzner Landstrafe 400, D 01314 Dresden, Germany
    Med Phys 37:1392-400. 2010
    ..Although conventional and laser-based particle accelerators will administer the same dose to the patient, their different time structures could result in different ..

Research Grants27

  1. A Compact Soft X-Ray Microbeam Facility for Small Laboratories
    STEPHEN HORNE; Fiscal Year: 2009
    ..Currently, microbeam facilities require large particle accelerators or synchrotron sources, placing them out of reach of smaller laboratories...
  2. Real-time in Vivo Dosimetry in Radiation Therapy Using Scintillation Detectors
    Sam Beddar; Fiscal Year: 2009
    ..The resulting data can also be used to study dose- related treatment side effects. The ultimate goal of utilizing this method is to improve the delivery of radiotherapy treatments and the quality of life of radiotherapy patients. ..
  3. Prediction of Second Cancer Risks for Children Treated with Proton - vs. - Photon
    Wayne D Newhauser; Fiscal Year: 2010
    ..In the future, we expect that the lower-risk treatments will result in fewer second cancers and this will translate into longer, higher-quality lives for survivors of childhood cancer (presently 270,000 persons in the United States). ..
  4. Accurate, easy-to-commission radiotherapy beam models
    Bruce Faddegon; Fiscal Year: 2008
    ..This will allow clinics around the country to take advantage of the computational accuracy of this state-of-the-art clinical tool. [unreadable] [unreadable]..
  5. HIGH ENERGY IONS AND GENOMIC INSTABILITY
    Eric Hall; Fiscal Year: 2001
    ....
  6. A High Quantum Efficiency Flat-Panel Radiotherapy Imager
    Larry Antonuk; Fiscal Year: 2009
    ....
  7. Quantitation of Tocopherol Metabolism in Humans
    ANDREW JOSEPH CLIFFORD; Fiscal Year: 2010
    ..Particular attention will be directed to the absorption phase. The results are expected to provide information about vitamin E biopotency and eventually improved Dietary Recommendations. ..
  8. FLAT PANEL CONE BEAM CT FOR IMAGE GUIDED RADIOTHERAPY
    David Jaffray; Fiscal Year: 2004
    ..Successful completion of this program will identify an imaging solution that addresses the clinical need for image-guidance in radiation therapy. ..
  9. Spatial-Temporal Imaging of Cell Proliferation & Hypoxia
    Robert Jeraj; Fiscal Year: 2007
    ..unreadable] [unreadable]..
  10. Real-Time PDT Dosimetry with Feedback Light Delivery
    Timothy Zhu; Fiscal Year: 2008
    ..abstract_text> ..
  11. Laser acceleration of protons for radiation therapy
    Dale Litzenberg; Fiscal Year: 2007
    ..This research will conduct the first critical step in determining if the cost can be dramatically reduced through the use of new acceleration technology. [unreadable] [unreadable] [unreadable]..
  12. Quantitation of In Vivo Human Lutein Metabolism
    ANDREW JOSEPH CLIFFORD; Fiscal Year: 2010
    ..Therefore, the purpose of this study is to determine how the human body uses lutein and other related compounds. ..
  13. HYBRID, FLAT-PANEL, ACTIVE MATRIX MAMMOGRAPHIC IMAGER
    Larry Antonuk; Fiscal Year: 2001
    ....
  14. Ninth Symposium on Neutron Dosimetry
    Joseph McDonald; Fiscal Year: 2003
    ..S. researchers and those from other countries. The research results to be presented at the symposium will focus on the safe use of neutron radiation in health care and health protection. ..
  15. HIGH-PRECISION IMAGE-GUIDED RADIOTHERAPY OF THE PROSTATE
    David Jaffray; Fiscal Year: 2004
    ..The completion of this system will provide radiation oncologists with the opportunity for unprecedented geometric precision in non-invasive therapy of the prostate. ..
  16. Digital tomosynthesis: a new paradigm for radiation treatment verification
    Fang Fang Yin; Fiscal Year: 2008
    ..This more frequent and broader range of application will translate into more consistent elimination of tumor and into less damage to nearby healthy tissue. [unreadable] [unreadable] [unreadable]..
  17. FLAT PANEL CONE BEAM CT FOR IMAGE GUIDED RADIOTHERAPY
    David Jaffray; Fiscal Year: 2002
    ..Successful completion of this program will identify an imaging solution that addresses the clinical need for image-guidance in radiation therapy. ..
  18. ADVANCED TECHNOLOGY FLAT PANEL IMAGER FOR FLUOROSCOPY
    Larry Antonuk; Fiscal Year: 2001
    ..The successful development of a technology exhibiting these performance levels could have a profound impact on digital radiology. ..
  19. RADIOLOGICAL RESEARCH ACCELERATOR FACILITY (RARAF)
    David Brenner; Fiscal Year: 2002
    ..abstract_text> ..
  20. Better correlation of outcomes with MC dose calculation
    Indrin Chetty; Fiscal Year: 2007
    ..unreadable] [unreadable]..
  21. High Stability Accelerator for Sub-Cellular Microbeam
    David Brenner; Fiscal Year: 2003
    ..We have considerably more demand for microbeam time than we can cope with, primarily because of limited physicist manpower. ..
  22. Carbon Nanotube Field Emission Microbeam Array for Single Cell Irradiation
    Sha Chang; Fiscal Year: 2007
    ..unreadable] [unreadable]..
  23. DYNAMIC AND KINETIC BEHAVIOR OF FOLATE METABOLISM
    Andrew Clifford; Fiscal Year: 2005
    ..We will determine the in vivo kinetic behavior of a tracer dose of folate in blood, urine, and stool. We will then compare the behavior of folate metabolism (functional endpoint) among the various genotypes. ..
  24. Cancer Risks Attributable To Radiation from Pediatric CT
    David Brenner; Fiscal Year: 2006
    ..The target audiences will be radiologists, pediatricians, family physicians, and the CT industry. We will use telephone interviews supplemented with survey questions, to aid in web content decisions. ..
  25. Chemotherapy with injectable microdroplets
    FRANCESCO D ERRICO; Fiscal Year: 2007
    ..unreadable] [unreadable]..
  26. IN VIVO DYNAMIC OF BETA-CAROTENE METABOLISM IN HUMANS
    Andrew Clifford; Fiscal Year: 2006
    ....
  27. Web-Based Instruction for Medical Dosimetrists
    Paul Keall; Fiscal Year: 2006
    ..abstract_text> ..