论文部分内容阅读
根据摄影部位,选择缩光圈,对提高影像的对比度与清晰度有很大的意义,缩光圈的大小,决定了它的照射野的范围,缩小光圈更可发挥它特有的作用。可使组织结构显示更为清晰。近年来,国内外常用高千伏摄片这样将使续发射线相应增多,如用缩小光圈,可大大减少续发身线,用缩小光圈可以减少对病员的X线照射量,对病员的健康大有好处。
According to the photography site, select the shrink ring, to improve the contrast and clarity of the image has great significance, shrink the size of the circle, determines the scope of its exposure to the field, reduce the aperture can play its unique role. Organizational structure can be displayed more clearly. In recent years, at home and abroad commonly used high-kv radios will make a corresponding increase in the renewal of radiation, such as the use of narrowing the aperture, can greatly reduce the recurrence of line, with reduced aperture can reduce the patient’s X-ray exposure, the patient’s health Great benefits.