He calculated backward to figure out how big an X-raydose would be needed to get the kind of images the machines produce.
于是他反向推算了一下扫描仪生成符合机场安检要求的图像所需的X射线剂量。
2
Objective:To investigate CT simulation scan in recurrent nasopharyngeal carcinoma to control x-raydose in visual nervous.
目的：探讨CT模拟在鼻咽癌局部复发适形放疗中控制视神经剂量中的应用价值。
3
Methods Using CT performance phantom, dose phantom and X-raydose survey meter to test all specifications of CT performance that were demanded by the state regulations.