Surface and percentage depth doses for secondary blocking using a multileaf collimator and cerrobend-alloy blocks.

Dawson, J; Kahler, D; McDonald, B; Kopecky, W; Gu, J · Radiother Oncol · 1997

basic_science · Level V

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Abstract

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.

Medical subject headings