Journal of the Korean Society for Therapeutic Radiology  1989;7(1):133-140

A Study of Three-dimension Tissue Equivalent Compensator for 6MV X-Rays.

Ok Bae KIM 1 ; Tae Jin CHOI ; Soo Jhi SUH

Affiliations

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Keywords

3-D compensator; tissue deficit; TL Dosimetry

Country

Republic of Korea

Language

Korean

Abstract

Three-dimension paraffin compensator was designed to construct the tissue equivalent compensator for irregular body contours and obiliques beam incidence. The ratio of compensator thickness to tissue deficit was depended on field size, depth and air gap because the scattered dose loss. The ratio of compensator-tissue was optimized 0.79, 0.73, 0.61 and 0.50 in 6MV x-rays as function of field size 4x4, 10x10, 20x20 and 30x30 cm2 respectively in our study. Using this tissue equivalent compensator, it can be got 2% difference of dose at same mid-plane in phantom study.