Focal-spot measurement technique of diagnostic x-ray tube using imaging plate

比较了直接曝光X射线胶片和成像板(IP)对狭缝和星分辨率模式相机技术的焦斑尺寸测量结果。因此，与直接曝光X射线胶片法相比，激电法对大小焦点的测量略大，但由于采样的原因，高估了微焦点尺寸的测量，扩大了容差范围。对于星形相机技术，两种探测器的测量结果差别不大。因此，如果将这种方法应用于医疗机构的质量控制，那么用激电法测量焦斑大小对大小焦点都是可行的。

Comparisons of focal-spot size measurements with a direct-exposure X-ray film and an imaging plate (IP) were carried out for the slit and star resolution pattern camera techniques. As a result, compared with the direct-exposure X-ray film method, the measurements with IP were slightly large for large and small focal spots although the measurement of the micro focal-spot size was overestimated extending the tolerance level due to the sampling. For the star pattern camera technique, the differences by two kinds of detectors were little. Therefore, it was thought that the measurement of the focal-spot size with IP would become practical for the large and small focal spots if this method were aimed at the quality control in medical facilities.