Ověření výpočtu absorbované dávky pomocí TLD dozimetrie v nehomogenním prostředí

Abstract

The AAA and Acuros XB algorithms calculate dose distribution for radiotherapy planning on conventional linear accelerators. It is very important to have planned dose distribution for radiotherapy treatment calculated as accurate as possible. The aim of this thesis is to verify, by thermoluminescent dosimetry and anthropomorphic thoracic phantom, how much the planned dose distributions match with the real ones for the individual calculation algorithms in clinical VMAT plans. This problem is usually solved only by simple phantoms, which are irradiated with one open field from one angle. In this work I will use a non-homogeneous phantom corresponding to the human chest, which will be irradiated from many different angles and a dynamically changing field. TLDs will be placed in predefined locations within the phantom. This will create conditions for measurement of therapeutic irradiation close to human.