García-Vicente F, Delgado J M, Rodríguez C
Hospital Universitario La Princesa, Servicio de Oncología Radioterápica, Departamento de Radiofisica, Madrid, Spain. fgarcia/
Phys Med Biol. 2000 Mar;45(3):645-50. doi: 10.1088/0031-9155/45/3/306.
One of the most important aspects in the metrology of radiation fields is the problem of the measurement of dose profiles in regions where the dose gradient is large. In such zones, the 'detector size effect' may produce experimental measurements that do not correspond to reality. Mathematically it can be proved, under some general assumptions of spatial linearity, that the disturbance induced in the measurement by the effect of the finite size of the detector is equal to the convolution of the real profile with a representative kernel of the detector. In this work the exact relation between the measured profile and the real profile is shown, through the analytical resolution of the integral equation for a general type of profile fitting function using Gaussian convolution kernels.
辐射场计量学中最重要的方面之一是在剂量梯度较大的区域测量剂量分布的问题。在这些区域，“探测器尺寸效应”可能会产生与实际情况不符的实验测量结果。在空间线性的一些一般假设下，可以从数学上证明，探测器有限尺寸效应在测量中引起的干扰等于真实分布与探测器代表性核的卷积。在这项工作中，通过使用高斯卷积核对一般类型的分布拟合函数的积分方程进行解析求解，展示了测量分布与真实分布之间的精确关系。
