与千伏x线治疗机相比,采用加速器高能光子线有下列主要优点:1.皮肤剂量低,最大剂量在表面下;2。由于高能光子的穿透力增强,深部剂量的衰减较慢;3.随着光子能量的增加,高能光子的平均散射角减小,与千伏x线相比,高能光子的侧向散射较少;4.由于康普顿过程(ComPton Process)占首位,减少了骨组织对射线剂量的吸收。 因为前三点性质表现出随着能量的增加而不断 Compared with the kV x-ray machine, the use of accelerator high-energy photonic lines has the following main advantages: 1. The skin dose is low, the maximum dose is below the surface; 2. Due to the enhanced penetrating power of high-energy photons, the attenuation of deep doses is slower; 3. As the photon energy increases, the average scattering angle of high-energy photons decreases, and lateral scatter of high-energy photons is less compared to kV x lines. ; 4. Because of the Compton process (the ComPton Process) takes the lead, it reduces the absorption of radiation doses by bone tissue. Because the first three properties show a constant increase in energy