OPTIMIZED MAMMOGRAPHY INSTRUMENT

乳房X光检查在乳腺癌的早期发现中起着至关重要的作用。 不幸的是，今天使用的乳房X光检查装置从来没有 从系统的角度进行分析。多参数优化 Muntz等人已经报道了乳房X光照相系统的研究。(地中海 PYS 12、5、1985)，其中患者剂量已降至最低，同时 保持令人满意的图像质量。最重要的新功能 该设计的特点是存在一组排列在 在乳房和胶片之间围绕x射线源形成的弧线。这个 叶片吸收散射辐射，从而提高了叶片的质量 图像。为了使叶片不会出现在胶片上，网格必须 在曝光过程中以精确控制的轮廓移动。

Mammography plays a vital part in the early detection of breast cancer. Unfortunately, mammography units being used today have never been analyzed from a systems point of view. Multiparameter optimization studies of a mammography system have been reported by Muntz et al. (Med Phys 12, 5, 1985) in which the patient dose has been minimized while maintaining satisfactory image quality. The most important new feature of the design is the presence of an array of thin metal vanes arranged in an arc about the x-ray source, between the breast and the film. The vanes absorb scattered radiation, and thus improve the quality of the image. In order for the vanes not to image on the film, the grid must move in a precisely controlled profile during the exposure.