M J Butson

Summary

Affiliation: New South Wales
Country: Australia

Publications

  1. ncbi request reprint High sensitivity radiochromic film dose comparisons
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 47:N291-5. 2002
  2. ncbi request reprint Peripheral dose measurement with a MOSFET detector
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Appl Radiat Isot 62:631-4. 2005
  3. ncbi request reprint Polarization effects on a high-sensitivity radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 48:N207-11. 2003
  4. ncbi request reprint Polarity effect on surface dose measurement for an attix parallel plate ionisation chamber
    M J Butson
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 26:85-7. 2003
  5. ncbi request reprint Variations in 6MV x-ray radiotherapy build-up dose with treatment distance
    M J Butson
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 26:88-90. 2003
  6. ncbi request reprint Rounded end multi-leaf penumbral measurements with radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong, People s Republic of China
    Phys Med Biol 48:N247-52. 2003
  7. ncbi request reprint Absorption spectra analysis of exposed FWT-60 radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 49:N377-81. 2004
  8. ncbi request reprint Effects of temperature variation on MOSFET dosimetry
    Tsang Cheung
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong, Republic of China
    Phys Med Biol 49:N191-6. 2004
  9. ncbi request reprint Surface dose extrapolation measurements with radiographic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 49:N197-201. 2004
  10. ncbi request reprint Corresponding dose response of radiographic film with layered gafchromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 47:N285-9. 2002

Detail Information

Publications48

  1. ncbi request reprint High sensitivity radiochromic film dose comparisons
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 47:N291-5. 2002
    ..8 and 1.9 times more sensitive than MD-55-1 and MD-55-2 films, respectively. At the absorption peak yielding the maximum optical density change, HS was found to be approximately 0.2 to 0.25 times the sensitivity of EDR-2...
  2. ncbi request reprint Peripheral dose measurement with a MOSFET detector
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Appl Radiat Isot 62:631-4. 2005
    ..The results have shown that the MOSFET device can adequately measure peripheral doses, which would be beneficial for in vivo dose assessments in radiotherapy...
  3. ncbi request reprint Polarization effects on a high-sensitivity radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 48:N207-11. 2003
    ....
  4. ncbi request reprint Polarity effect on surface dose measurement for an attix parallel plate ionisation chamber
    M J Butson
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 26:85-7. 2003
    ..When these charge reading are compared to the Dmax readings of the same polarity it is found that these polarity effects are minimal for the calculation of percentage dose results with variations being less than 1% of maximum...
  5. ncbi request reprint Variations in 6MV x-ray radiotherapy build-up dose with treatment distance
    M J Butson
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 26:88-90. 2003
    ..These variations are largest at the skin surface and reduce with depth. The use of a multi leaf collimator for blocking removes extra skin dose caused by the Perspex block trays with decreasing SSD...
  6. ncbi request reprint Rounded end multi-leaf penumbral measurements with radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong, People s Republic of China
    Phys Med Biol 48:N247-52. 2003
    ....
  7. ncbi request reprint Absorption spectra analysis of exposed FWT-60 radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 49:N377-81. 2004
    ..077 OD units per kGy. The film can be an ideal dosimeter for areas where high dose levels need to be measured...
  8. ncbi request reprint Effects of temperature variation on MOSFET dosimetry
    Tsang Cheung
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong, Republic of China
    Phys Med Biol 49:N191-6. 2004
    ....
  9. ncbi request reprint Surface dose extrapolation measurements with radiographic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 49:N197-201. 2004
    ..To achieve this result, film calibration curves must be irradiated to similar x-ray field sizes as the experimental film to minimize quantitative variations in film optical density caused by varying x-ray spectrum with field size...
  10. ncbi request reprint Corresponding dose response of radiographic film with layered gafchromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 47:N285-9. 2002
    ..Due to this high dose response that is achievable, the five layer HS could be used in applications where small doses are delivered to certain areas and a low dependence of energy response is required for measurement...
  11. ncbi request reprint Visible absorption properties of radiation exposed XR type-T radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 49:N347-51. 2004
    ..The film produces a relatively high dose sensitivity with up to 0.25 OD units per Gy change at 672 nm at 100 kVp x-ray energy. Variations in dose sensitivity can be achieved by varying wavelength analysis...
  12. ncbi request reprint Absorption spectra variations of EBT radiochromic film from radiation exposure
    M J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 50:N135-40. 2005
    ..The film provides adequate relative absorbed dose measurement for clinical radiotherapy x-ray assessment in the 1-2 Gy dose range which with further investigation may be useful for fractionated radiotherapy dose assessment...
  13. ncbi request reprint XR type-R radiochromic film x-ray energy response
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 50:N195-9. 2005
    ..XR type-R film is ideal for a quantitative dosimeter in the low energy range due to its relative energy independence and high sensitivity compared to conventional radiochromic film...
  14. ncbi request reprint Absorption spectra of irradiated XRCT radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 51:3099-103. 2006
    ....
  15. ncbi request reprint Fluorescent light effects on FWT-60 radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 50:N209-13. 2005
    ..This feature may be of use for measurement of integrated UV exposure from fluorescent lights when required and produces a quantifiable history of total exposure...
  16. ncbi request reprint Dose and absorption spectra response of EBT2 Gafchromic film to high energy x-rays
    M J Butson
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 32:196-202. 2009
    ..As all new film batches should be calibrated for sensitivity upon arrival this should not be of concern...
  17. ncbi request reprint Effects of water light absorption properties of a radiographic film
    Tsang Cheung
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, People s Republic of China
    Phys Med Biol 47:N279-84. 2002
    ..g. 7.5% at 900 nm and 12.5% at 1000 nm) and are wavelength dependent. The changes produced by the water are relatively independent of the exposure time to water from 5 s up to 1 h or whether the water exposure occurred...
  18. ncbi request reprint Variations in skin dose using 6MV or 18MV x-ray beams
    P K N Yu
    City University ofHong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 26:79-81. 2003
    ....
  19. ncbi request reprint Measuring energy response for RTQA radiochromic film to improve quality assurance procedures
    M J Butson
    City University ofHong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 31:203-6. 2008
    ..Our results have shown that a 0.3 optical density change with RTQA film provides a colour change level useable for accurate alignment procedures..
  20. ncbi request reprint Visible dye light absorption properties of processed radiographic film
    T Cheung
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong
    Phys Med Biol 46:N197-201. 2001
    ..Thus it is most efficient to have a densitometer with a light source suitable for radiochromic film, which can also be used with radiographic film...
  21. ncbi request reprint MOSFET dosimetry in-vivo at superficial and orthovoltage x-ray energies
    T Cheung
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 26:82-4. 2003
    ..The MOSFET does have the advantage of returning a relatively immediate dosimetric result after irradiation...
  22. ncbi request reprint Scanning orientation effects on Gafchromic EBT film dosimetry
    M J Butson
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 29:281-4. 2006
    ..As such, providing the same orientation of EBT film when scanning for dosimetric analysis becomes an essential part of EBT film dosimetry...
  23. ncbi request reprint Prostate dosimetry in an anthropomorphic phantom
    P K N Yu
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 27:60-2. 2004
    ....
  24. ncbi request reprint Radiochromic film for verification of superficial x-ray backscatter factors
    M J Butson
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 30:269-73. 2007
    ..3mm) of one film piece. GAFCHROMIC EBT, Radiochromic film provides a very simple and easy method for measurement and verification of BSF for x-ray energies commonly used for superficial x-ray therapy...
  25. ncbi request reprint Measurement of high energy x-ray beam penumbra with Gafchromic EBT radiochromic film
    Tsang Cheung
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Med Phys 33:2912-4. 2006
    ..Gafchromic EBT film provides an adequate measure of penumbral dose for high energy x-ray beams...
  26. ncbi request reprint Blood irradiation with accelerator produced electron beams
    M J Butson
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong
    Phys Med Biol 45:N139-42. 2000
    ..5 minutes for 30 Gy applied dose to complete as opposed to 12 minutes for a dual field x-ray field irradiation at our centre. Electron beams can be used to satisfactorily irradiate blood and blood products in a minimal amount of time...
  27. ncbi request reprint Evaluation of the magnitude of EBT Gafchromic film polarization effects
    M J Butson
    City University of Hong Kong, Dept of Physics and Materials Science, Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 32:21-5. 2009
    ....
  28. ncbi request reprint Energy dependence corrections to MOSFET dosimetric sensitivity
    T Cheung
    City University of Hong Kong, Dept of Physics and Materials Science Kowloon Tong, Hong Kong
    Australas Phys Eng Sci Med 32:16-20. 2009
    ....
  29. ncbi request reprint Radiochromic film dosimetry in water phantoms
    M J Butson
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong
    Phys Med Biol 46:N27-31. 2001
    ..Radiochromic film seems to be an adequate detector for dosimetry in a water phantom where high spatial resolution is needed and angle of beam incidence at the point of interest is important...
  30. ncbi request reprint Dosimetry of blood irradiation with radiochromic film
    M J Butson
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong
    Transfus Med 9:205-8. 1999
    ..95+/-2.6 Gy for two standard deviations. Like currently available 'irradiated' film labels, the radiochromic film also serves as a visible reminder that the blood products have been irradiated...
  31. ncbi request reprint Measurement of energy dependence for XRCT radiochromic film
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Med Phys 33:2923-5. 2006
    ..This matches well with beam qualities for diagnostic computed topography applications...
  32. ncbi request reprint Measurement of skin dose variations produced by a silicon-based protective dressing in radiotherapy
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, People s Republic of China
    Phys Med Biol 47:N145-51. 2002
    ..Results have shown that a large variation in skin dose is delivered under the dressing depending on the amount of material directly above it as defined by the silicon mesh outline...
  33. ncbi request reprint Use of a blood glucose meter for radiochromic film analysis in blood irradiation
    Tsang Cheung
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong
    Phys Med Biol 47:N259-63. 2002
    ..3%); however, results show that the blood glucose meter, which would be available in any haematology department, produces an adequate measure of gafchromic film optical density for blood irradiation dosimetry...
  34. ncbi request reprint Comparison of effective source-surface distances for electron beams derived from measurements made under different scatter conditions
    K Y Quach
    Illawarra Cancer Care Centre, Wollongong, NSW
    Australas Phys Eng Sci Med 22:99-102. 1999
    ..The results also show the difference is reduced for a larger applicator, probably because the applicator scatter component reaching the in-air measurement point is reduced...
  35. ncbi request reprint Measurement of radiotherapy x-ray skin dose on a chest wall phantom
    K Y Quach
    Illawarra Cancer Care Centre, The Wollongong Hospital, Department of Radiotherapy, NSW, Australia
    Med Phys 27:1676-80. 2000
    ..Beyond this angle it is assumed that beam attenuation through the phantom and inverse square fall-off is causing the surface dose to reduce...
  36. ncbi request reprint Megavoltage x-ray skin dose variation with an angle using grid carbon fibre couch tops
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong, People s Republic of China
    Phys Med Biol 52:N485-92. 2007
    ..As such, if the treatment type results in a more rigorously positioned patient on the treatment couch, the wave nature of skin dose delivery may need to be taken into account...
  37. ncbi request reprint Visible absorption spectra of radiation exposed SIRAD dosimeters
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 51:N417-21. 2006
    ..The film provides an adequate measurement and visually qualitative assessment of radiation exposure for levels in the range of 0 to 200 R...
  38. doi request reprint Measurement of dose reductions for superficial x-rays backscattered from bone interfaces
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 53:N329-36. 2008
    ....
  39. ncbi request reprint Source and detector polarization effects on radiographic film dosimetry
    Tsang Cheung
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong, People s Republic of China
    Phys Med Biol 48:N329-34. 2003
    ..We recommend that a polarization test be performed on a densitometry system to establish the extent of its polarization properties before accurate dosimetry is performed with radiographic film...
  40. ncbi request reprint Experimental energy response verification of XR type T radiochromic film
    Tsang Cheung
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Phys Med Biol 49:N371-6. 2004
    ..6-0.7 for the same effective energies. This type of film has been optimized for use in diagnostic energy ranges producing a relatively uniform dose response in the 30 keV to 70 keV range...
  41. ncbi request reprint Weak energy dependence of EBT gafchromic film dose response in the 50 kVp-10 MVp X-ray range
    Martin J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Appl Radiat Isot 64:60-2. 2006
    ..This weak dependence provides significantly higher accuracy of dose measurements under conditions of varying spectral quality of X-ray beams, which are common in radiation therapy...
  42. ncbi request reprint Independence of calibration curves for EBT Gafchromic films of the size of high-energy X-ray fields
    Tsang Cheung
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Appl Radiat Isot 64:1027-30. 2006
    ..With the help of this film, it was shown that the output factor for a 0.5 x 0.5 cm(2) field is 0.60+/-0.03 (2SD) relative to the 10 x 10 cm(2) field...
  43. ncbi request reprint Measurement of radiotherapy superficial X-ray dose under eye shields with radiochromic film
    Martin J Butson
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Phys Med 24:29-33. 2008
    ..Radiochromic film has been found to accurately measure dose under eye shield in phantom treatments...
  44. ncbi request reprint Spatial resolution of a stacked radiochromic film dosimeter
    M J Butson
    Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Radiother Oncol 61:211-3. 2001
    ..2 mm.Conclusion: The stack dosimeter can provide useful in vivo information such as the position of a diverging beam edge for treatments around critical structures such as eyes during the first fraction of treatment...
  45. ncbi request reprint Multilayer Gafchromic film detectors for breast skin dose determination in vivo
    Tsang Cheung
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong
    Phys Med Biol 47:N31-7. 2002
    ..The multilayer Gafchromic film detector provided adequate skin dose assessment within one fraction of treatment for in vivo results...
  46. ncbi request reprint Post-irradiation colouration of Gafchromic EBT radiochromic film
    Tsang Cheung
    Deptment of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong
    Phys Med Biol 50:N281-5. 2005
    ..Also, calibration films must be read out with the same post-irradiation time to further enhance the accuracy of dosimetry...
  47. ncbi request reprint X-Ray energy dependence of the dose response of SIRAD radiation dosimeters
    Tsang Cheung
    City University of Hong Kong, Department of Physics and Materials Science, Kowloon Tong, Hong Kong
    Appl Radiat Isot 65:814-7. 2007
    ....
  48. ncbi request reprint Radiochromic film: the new x-ray dosimetry and imaging tool
    Martin J Butson
    Australas Phys Eng Sci Med 27:230. 2004