During superficial radiotherapy, and for cases where bony structures lie relatively close to the surface behind the tissue region being treated, perturbations to delivered dose are expected due to the change in tissue scattering conditions and the value of buildup factor near the tissue/bone interface. The absorbed dose distribution within bone, muscle, and muscle-bone-muscle interfaces was estimated for photons within the energy range 0.05 to 1.333 MeV. The energy absorption buildup factor is computed using the (GP) fitting method for a geometry of adjacent layers within a multilayer tissue matrix where a thick slab of solid bone is located in-between slabs of muscles of the same thickness. It was observed that dose enhancement was limited only to a few millimeters close to the interface. Also, variations in dose at the interface were found significant only for low photon energies and relatively insignificant at photon energies higher than 0.06 MeV.

在浅表放射治疗期间，对于骨结构相对靠近被治疗组织区域后面的表面的情况，由于组织散射条件的变化和组织/骨界面附近的累积因子值，预计会对递送剂量产生扰动。对于能量范围为 0.05 到 1.333 MeV 的光子，估计了骨骼、肌肉和肌肉-骨骼-肌肉界面内的吸收剂量分布。能量吸收累积因子是使用 (GP) 拟合方法计算的，用于多层组织基质中相邻层的几何形状，其中厚实骨板位于相同厚度的肌肉板之间。据观察，剂量增强仅限于靠近界面的几毫米。还，