uniformity (with respect to CAX)? Are range compensators used to vary penetration of beam Yes/no across the field? acrylic If so, what material is used? wax apertures What kind of patient specific MLC beam collimation is used? none Is modulated scanning used for patients on NCI supported Yes/no clinical trials? If modulated scanning is used, how long does it take to irradiate a 10x10x10 cm³ target minutes volume that has a distal depth of 20 cm of water to 1 Gy? For spot scanning for the field above, what is the average and 16 mm ± 1 mm variation in spot size? Over all energies, what are the max 30 mm maximum and minimum spot sizes? min 10 mm *Note: Use these codes to describe methods of range modulation that might be used for protocol patients (may combine codes for accurate description, for example 1 & 2, or 3 & 4): 1. rotating stepped rangeshifter (modulator wheel or propeller) 2. beam current modulation 3. ridge filter 4. energy stacking 5. spot scanning 6. upstream rangeshifter 7. Other (describe) C4. How is dose uniformity over SOBP specified? (e.g. relative to nominal center of modulation, relative to measured center of modulation, relative to average dose within modulated region, etc.) C5. For each beam applicator (cone) available, please supply the shape, maximum field size supported, maximum range, and typical clinical dose rate at maximum field size and maximum range for 6.0 cm of range modulation. Beam Shape Max Field Size Max Range Dose Rate Applicator (circle, square, [cm] [cm water] [Gy/min] ID other)
uniformity (with respect to CAX)? Are range compensators used to vary penetration of beam across the field? Yes/no If so, what material is used? acrylic wax What kind of patient specific beam collimation is used? apertures MLC none Is modulated scanning used for patients on NCI supported clinical trials? Yes/no If modulated scanning is used, how long does it take to irradiate a 10x10x10 cm³ target volume that has a distal depth of 20 cm of water to 1 Gy? minutes For spot scanning for the field above, what is the average and variation in spot size? 16 mm ± 1 mm Over all energies, what are the maximum and minimum spot sizes? max 30 mm min 10 mm *Note: Use these codes to describe methods of range modulation that might be used for protocol patients (may combine codes for accurate description, for example 1 & 2, or 3 & 4): 1. rotating stepped rangeshifter (modulator wheel or propeller) 2. beam current modulation 3. ridge filter 4. energy stacking 5. spot scanning 6. upstream rangeshifter 7. Other (describe) C4. How is dose uniformity over SOBP specified? (e.g. relative to nominal center of modulation, relative to measured center of modulation, relative to average dose within modulated region, etc.) C5. For each beam applicator (cone) available, please supply the shape, maximum field size supported, maximum range, and typical clinical dose rate at maximum field size and maximum range for 6.0 cm of range modulation. Beam Applicator ID Shape (circle, square, other) Max Field Size [cm] Max Range [cm water] Dose Rate [Gy/min]
Proton%20Questionnaire%20-%202-2014.docx