CHANG-MING C MA

Summary

Affiliation: Fox Chase Cancer Center
Country: USA

Publications

  1. ncbi request reprint A Monte Carlo dose calculation tool for radiotherapy treatment planning
    C M Ma
    Radiation Oncology Department, Stanford University School of Medicine, CA 94305, USA
    Phys Med Biol 47:1671-89. 2002
  2. ncbi request reprint A quality assurance phantom for IMRT dose verification
    C M Ma
    Radiation Oncology Department, Stanford University School of Medicine, Stanford, CA 94305, USA
    Phys Med Biol 48:561-72. 2003
  3. ncbi request reprint A comparative dosimetric study on tangential photon beams, intensity-modulated radiation therapy (IMRT) and modulated electron radiotherapy (MERT) for breast cancer treatment
    C M Ma
    Department of Radiation Oncology Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 48:909-24. 2003
  4. ncbi request reprint Effect of statistical uncertainties on Monte Carlo treatment planning
    C M Ma
    Radiation Oncology Department, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 50:891-907. 2005
  5. ncbi request reprint Monitor unit calculation for Monte Carlo treatment planning
    C M Ma
    Radiation Oncology Department, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 49:1671-87. 2004
  6. ncbi request reprint 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
  7. ncbi request reprint A practical Monte Carlo MU verification tool for IMRT quality assurance
    J Fan
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 51:2503-15. 2006
  8. ncbi request reprint Characterization of megavoltage electron beams delivered through a photon multi-leaf collimator (pMLC)
    F C P du Plessis
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 51:2113-29. 2006
  9. ncbi request reprint Dosimetric evaluation of MRI-based treatment planning for prostate cancer
    L Chen
    Radiation Oncology Department, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 49:5157-70. 2004
  10. ncbi request reprint Impact of pelvic nodal irradiation with intensity-modulated radiotherapy on treatment of prostate cancer
    Robert A Price
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Int J Radiat Oncol Biol Phys 66:583-92. 2006

Detail Information

Publications20

  1. ncbi request reprint A Monte Carlo dose calculation tool for radiotherapy treatment planning
    C M Ma
    Radiation Oncology Department, Stanford University School of Medicine, CA 94305, USA
    Phys Med Biol 47:1671-89. 2002
    ..The effect of energy cut-offs for particle transport was investigated. Variance reduction techniques were implemented in MCDOSE to achieve a speedup factor of 10-30 compared to DOSXYZ...
  2. ncbi request reprint A quality assurance phantom for IMRT dose verification
    C M Ma
    Radiation Oncology Department, Stanford University School of Medicine, Stanford, CA 94305, USA
    Phys Med Biol 48:561-72. 2003
    ..The QA phantom has been integrated as a routine QA procedure for the patient's IMRT dose verification at Stanford since 1999...
  3. ncbi request reprint A comparative dosimetric study on tangential photon beams, intensity-modulated radiation therapy (IMRT) and modulated electron radiotherapy (MERT) for breast cancer treatment
    C M Ma
    Department of Radiation Oncology Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 48:909-24. 2003
    ..It is concluded that MERT has superior capabilities to achieve dose conformity both laterally and in the depth direction, which will be well suited for treating superficial targets such as breast cancer...
  4. ncbi request reprint Effect of statistical uncertainties on Monte Carlo treatment planning
    C M Ma
    Radiation Oncology Department, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 50:891-907. 2005
    ..We provide practical guidelines for the clinical implementation of Monte Carlo treatment planning and show realistic examples of Monte Carlo based IMRT and MERT plans...
  5. ncbi request reprint Monitor unit calculation for Monte Carlo treatment planning
    C M Ma
    Radiation Oncology Department, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 49:1671-87. 2004
    ..It is also used for absolute dose calculations using Monte Carlo simulations for treatment verification, which has become part of our comprehensive IMRT quality assurance programme...
  6. ncbi request reprint 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...
  7. ncbi request reprint A practical Monte Carlo MU verification tool for IMRT quality assurance
    J Fan
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 51:2503-15. 2006
    ..The results between the point detector and MCSIM agreed to within 2%. A factor of 20 speedup can be achieved with the point detector method compared with direct Monte Carlo simulations...
  8. ncbi request reprint Characterization of megavoltage electron beams delivered through a photon multi-leaf collimator (pMLC)
    F C P du Plessis
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 51:2113-29. 2006
    ..Bremsstrahlung measurements taken at 60 cm SSD for a 9 x 9 cm2 field as shaped by the pMLC compared within 1% to bremsstrahlung measurements taken at 100 cm SSD for a 10 x 10 cm2 electron applicator field at 100 cm SSD...
  9. ncbi request reprint Dosimetric evaluation of MRI-based treatment planning for prostate cancer
    L Chen
    Radiation Oncology Department, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 49:5157-70. 2004
    ..The difference in the target dose between CT- and MRI-based plans using homogeneous geometry was within 2.5%. Our results suggest that MRI-based treatment planning is suitable for radiotherapy of prostate cancer...
  10. ncbi request reprint Impact of pelvic nodal irradiation with intensity-modulated radiotherapy on treatment of prostate cancer
    Robert A Price
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Int J Radiat Oncol Biol Phys 66:583-92. 2006
    ..The aim of this study was to evaluate the feasibility of treating the pelvic lymphatic regions during prostate intensity-modulated radiotherapy (IMRT) with respect to our routine acceptance criteria...
  11. ncbi request reprint 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...
  12. ncbi request reprint Investigation of MR image distortion for radiotherapy treatment planning of prostate cancer
    Z Chen
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 51:1393-403. 2006
    ..Using the point-by-point method, the geometrical distortion after the GDC were reduced to <3 mm for external contour determination and the effective FOV was expanded from 36 cm to 42 cm...
  13. ncbi request reprint Elongated beamlets: a simple technique for segment and MU reduction for sMLC IMRT delivery on accelerators utilizing 5 mm leaf widths
    R A Price
    Department of Radiation Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
    Phys Med Biol 50:N235-42. 2005
    ..This technique directly translates to a decreased MSF(mod) allowing for decreased leakage dose to the patient, a decreased risk of exceeding secondary shielding limits in pre-existing vaults, and shorter treatment times...
  14. ncbi request reprint Shielding evaluation for IMRT implementation in an existing accelerator vault
    R A Price
    Department of Radiation Oncology, Fox Chase Cancer Center, 7701 Burholme Avenue, Philadelphia, Pennsylvania 19111, USA
    J Appl Clin Med Phys 4:231-8. 2003
    ..6% when using the SMLC delivery technique and our measured modulation scaling factors. This compares with a previously published value of 1.6% for routine 3D CRT delivery on the Varian accelerator...
  15. ncbi request reprint A particle track-repeating algorithm for proton beam dose calculation
    J S Li
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 50:1001-10. 2005
    ..The differences between them were within 2%. The new algorithm was about 13 times faster than the GEANT3 Monte Carlo code for a uniform phantom geometry and over 700 times faster for a heterogeneous phantom geometry...
  16. ncbi request reprint 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...
  17. ncbi request reprint Effect of patient variation on standard- and hypo-fractionated radiotherapy of prostate cancer
    W Xiong
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 50:1483-92. 2005
    ..On the other hand, for lower alpha/beta ratios, the beta term also plays a more important role in cell-killing and therefore the patient variation parameter sigmabeta must be considered when designing a new dose fractionation scheme...
  18. ncbi request reprint Lens dose in MLC-based IMRT treatments of the head and neck
    Todd Pawlicki
    Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305 5487, USA
    Int J Radiat Oncol Biol Phys 59:293-9. 2004
    ....
  19. ncbi request reprint Coulomb explosion effect and the maximum energy of protons accelerated by high-power lasers
    E Fourkal
    Department of Radiation Physics, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA
    Phys Rev E Stat Nonlin Soft Matter Phys 71:036412. 2005
    ..The heavy-ion motion is found to modify the longitudinal electric field distribution, thus changing the acceleration conditions for the protons...
  20. ncbi request reprint Investigation of optimal beam margins for stereotactic radiotherapy of lung-cancer using Monte Carlo dose calculations
    L Jin
    Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
    Phys Med Biol 52:3549-61. 2007
    ..The impact of the number of beam angles on the relationship between V20 and the beam margin was assessed. Quantitative information about optimal beam margins for lung-cancer SBRT was obtained for clinical applications...