McParland B J, Boyd M M, al Yousef K
Department of Medical Imaging, King Fahad National Guard Hospital, Riyadh, Saudi Arabia.
Br J Radiol. 1998 Sep;71(849):950-3. doi: 10.1259/bjr.71.849.10195010.
The optimization of optical density in film-screen mammography is crucial in attaining good image quality. While a target range for film optical density of 1.4-1.8 has been recommended for centres participating in the National Health Service Breast Screening Programme (NHSBSP), past investigations have shown that combinations of mammography film and screen and processor conditions can have various optimum densities, some of which are outside this recommended range. The optimum optical density of the film/screen/processor conditions combination used at our institution (the Kodak MIN-RM/MIN-R combination designed for standard-cycle processing) was evaluated using a breast detail phantom study. It was found that the optimum optical density was 1.25 OD. We recommend that an individual institution determines the optimum optical density for the film-screen combination it uses and the processing conditions specific to it.
在乳腺钼靶摄影中，优化胶片-增感屏的光学密度对于获得良好的图像质量至关重要。虽然对于参与国家医疗服务体系乳腺筛查计划（NHSBSP）的中心，已推荐胶片光学密度的目标范围为1.4 - 1.8，但过去的研究表明，乳腺钼靶摄影胶片与增感屏的组合以及冲洗条件可能有不同的最佳密度，其中一些超出了该推荐范围。我们机构使用的胶片/增感屏/冲洗条件组合（专为标准周期冲洗设计的柯达MIN - RM/MIN - R组合）的最佳光学密度通过乳腺细节模体研究进行了评估。结果发现最佳光学密度为1.25 OD。我们建议各个机构确定其使用的胶片-增感屏组合及其特定冲洗条件的最佳光学密度。
