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本文应用2°星形X线测试卡,对日本Circlex8个球管的10个不同尺寸焦点进行了散焦值测试。本文讨论了以下几个问题:1、焦点散焦值与焦点成像的关系,2、焦点成像性能的评价手段,3、焦点散焦值测试对临床X线摄影的指导意义,4、焦点散焦值测试的作用。我们认为,焦点散焦值测试是了解焦点性能的重要参数之一,它对选择最佳摄影参数,提高X线摄片质量有重要的指导意义。
In this paper, a 2 ° star X-ray test card was used to test the defocus value of 10 different-size focal points of 8 spherical tubes in Circlex Japan. This paper discusses the following issues: 1, the relationship between focus defocus value and focus imaging, 2, the focus of imaging performance evaluation means, 3, the focus of defocus value test for clinical X-ray photography, 4, the focus of defocus The role of value testing. In our opinion, the focus defocus value test is one of the important parameters for understanding the focus performance. It is of great guiding significance for selecting the best photographic parameters and improving the radiographic quality.