电子线全身照射中剂量分布

Dose distributions for total body electron irradiation

The paper describes the dose distributions for total body electron irradiation by Varian Clinac-20 linear accelerator and provides for clinical radiotherapy plan with more complete and useful dosimetric data and experiences. A scatter screen can be used to reduce the primary electron energy, control treatment depth and enhance the skin dose. While radiotherapy is restricted in a room with limited space, dual angled gantry multiple irradiation field technique is a (?) method to create a homogeneous dose distribution on patient's surface. For those sites located in the electron beam shadows, boosting irradiation and dose monitoring are necessary. The preliminary clinical trials indicate these dosimetric data and experiences are valid and feasible.