Abstract

Info

Author(s):: WANG Wu1; LI Xuhao2; JIN Xiance2; 1. Department of Medical Engineering, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China; 2. Department of Radiotherapy and Chemotherapy, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China

Keywords:: ; Keywords: linear accelerator treatment room design; radiation protection; maze; irradiation dose calculation

Abstract:: Abstract: The purpose of this study is to improve the design of a linear accelerator treatment room maze based on NCRP151 report, so as to change the thickness of shielding door, decreasing the radiation dose at the gate and eliminating the public panic on radiation. The calculations after improvements reveal that the radiation dose at the gate is 20.00 ?Sv/week when the direct extension length of maze reaches 24.4 m; that the radiation dose at the gate is 19.60 ?Sv/week for a maze with an extension length of 4.42 m and a 90° bend; and that the radiation dose at the gate is 18.53 ?Sv/week for a maze with an extension length of 2.7 m and a 180° bend. The mazes with 90° and 180° bends not only decrease the necessary extension length, but also reduce the cost for gate and maze construction. In a conclusion, a linear accelerator treatment room maze with an extension of 180° bends can minimize the effective dose and achieve a high cost-effectiveness.