Surface and percentage depth doses for secondary blocking using a multileaf collimator and cerrobend-alloy blocks.
Percentage depth doses from the surface to a depth of 30 cm have been measured for a number of square fields using 6 MV and 15 MV X-rays as part of the commissioning procedure for a commercially available MLC. Factors such as changing SSD, presence of a secondary blocking tray in the beam, and radiation transmission between the MLC leaves were investigated.
Dawson
J
J
Radiation Oncology Department, Saint Louis University Health Sciences Center, MO 63110-0250, USA.
Kahler
D
D
McDonald
B
B
Kopecky
W
W
Gu
J
J
D006801:Humans; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*; D011880:Radiotherapy Planning, Computer-Assisted