[移动射线摄影中带反散射栅格的光学瞄准器的发明]
[Invention of Optical Sight in Mobile Radiography with Anti-scatter Grid].
作者信息
Nakano Tsutomu
机构信息
Department of Radiology, Kitakyusyu Tsuyazaki Hospital (Current address: Department of Radiology, Kitakyusyu Munakata Cyuuou Hospital).
出版信息
Nihon Hoshasen Gijutsu Gakkai Zasshi. 2019;75(12):1420-1425. doi: 10.6009/jjrt.2019_JSRT_75.12.1420.
In radiography with anti-scatter grid, it is important to make sure that the X-ray beam direct exactly perpendicular to the grid plane. However, it is so difficult to ensure in mobile radiography. An optical sight to ensure X-ray alignment in mobile radiography with anti-scatter grid was devised. The device measures the X-ray beam angle respect to the grid plane by utilizing collimator-lamp. Computed radiography of water phantom on inclined bedding with anti-scatter grid (6 : 1) were done by aid of devised optical sight 20 times. The result showed that the average alignment error of the radiographies by aid of devised optical sight was within 1°, and the maximum error was<2°.
在使用防散射格栅的射线照相术中，确保X射线束直接精确垂直于格栅平面非常重要。然而，在移动射线照相术中很难做到这一点。为此设计了一种用于在使用防散射格栅的移动射线照相术中确保X射线对准的光学瞄准器。该装置利用准直器灯测量X射线束相对于格栅平面的角度。借助设计的光学瞄准器，对带有防散射格栅（6:1）的倾斜床上的水模体进行了20次计算机射线照相。结果表明，借助设计的光学瞄准器进行的射线照相的平均对准误差在1°以内，最大误差<2°。
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