Abstract
Total body irradiation (TBI) is performed before bone marrow transplantation (BMT) in case of leukemia. Uniform doses along the center of patients are essential in TBI. Differences of body thickness are compensated. In our facility, lead sheets of different thickness is used for compensator filters. Purpose of this paper are to evaluate the accuracy of our compensator system by means of checking doses along the center of the body during TBI. Eight semiconductor surface dosimeters (DPD-510 dosimeter) were used. A special holder was made of wood. An adsorbed dose in eight points along and over body was able to be measured. Compensator filters at various parts of patients’ body were able to be checked before TBI. Repeated evaluation made the compensator filters perfect. A dose monitor was able to check in real time during TBI. An adsorbed dose coincided to a prescription dose. Our method is useful for improvement of accurate and homogenous dose distribution in TBI.
