Dose Evaluation In The Movement Couch Of The Total Body Irradiation Technique Using Semiconducting Diodes And Thermo luminescence Detectors

Abstract

Aim of the present study is devoted to evaluate the dose at different points defined on the patient using semiconducting diodes and thermoluminescence detectors to execute verification of the dose at these relevant points calculated by means of movement couch and (Beam - Zones method) of the Total Body Irradiation Technique.

In this technique; 11 patients using 6MV X-ray in (non-standard) conditions lying on the couch (supine and prone positions) were treated. Barry translation couch positioned in the extended SSD on the floor of the treatment room of distance (200 cm) was used. The couch was moving (280 cm) with fixed machine dose rate (50 cGy/min), and constant velocity which is been calculated from the (beam- zone method) depending on the length, different separation in different organs, thorax wall separation, and the lung density of each patient individually.

Comparison between calculated