Kato Hideki
S.S. Techno-Engineering Corporation.
Nihon Hoshasen Gijutsu Gakkai Zasshi. 2003 Aug;59(8):965-75. doi: 10.6009/jjrt.kj00000921842.
When computing the amount of leakage from a diagnostic X-ray room, the transmission data of X-ray beams through the shielding material, which are used in the computation, must agree with the conditions of use of the X-ray equipment. Even if the tube potential is the same, the energy spectrum of generated X-rays depends on conditions such as high voltage rectification and total filtration, and transmission through the shielding material, too, is subject to change. In this paper, we propose a new method of calculation, which uses transmission data of mono-energetic photon beams computed by means of a Monte Carlo simulation, for obtaining effective dose transmission data through the shielding material of an X-ray beam with spectral distribution. We also present effective dose transmission data of primary X-ray beams and 90 degrees scattered X-ray beams through concrete and lead shields as determined by this method. This method, which can calculate the transmission data of X-ray beams with any spectral distribution, is useful in evaluating the leakage dose of diagnostic X-ray facilities.
在计算诊断用X射线室的泄漏量时，用于计算的X射线束通过屏蔽材料的传输数据必须与X射线设备的使用条件一致。即使管电压相同，所产生X射线的能谱也取决于诸如高压整流和总过滤等条件，并且通过屏蔽材料的传输也会发生变化。在本文中，我们提出了一种新的计算方法，该方法使用通过蒙特卡罗模拟计算得到的单能光子束的传输数据，以获取具有光谱分布的X射线束通过屏蔽材料的有效剂量传输数据。我们还给出了通过该方法确定的初级X射线束和90度散射X射线束通过混凝土和铅屏蔽的有效剂量传输数据。这种能够计算任何光谱分布的X射线束传输数据的方法，对于评估诊断用X射线设备的泄漏剂量很有用。
