计算机乳腺摄影影像处理参数的探讨

目的　探讨通过对计算机乳腺摄影影像处理参数的合理的选择和运用 ,以提高乳腺摄影的图像质量及降低X线剂量。方法　对 3 0 0例不同乳腺类型患者进行常规乳腺摄影和计算机乳腺摄影 ,对二者摄影参数进行比较 ;对计算机乳腺摄影影像处理参数修改前后的乳腺照片进行对比分析 ,确定最佳的乳腺影像处理参数。结果　计算机乳腺摄影能显著降低受检者的辐射量 ,不同乳腺类型的X线剂量是常规乳腺摄影的 1/3～ 1/2 ;最适宜的计算机乳腺摄影影像处理参数为 :GA =1.2 ;GT =G ;GC =0 .6;GS =0 .3 ;RN =5 ;RT =P ;RE =1.0。结论　计算机乳腺摄影因其具有大的曝光宽容度和高的检测敏感性 ,通过合理的选择影像处理参数可获得高质量的图像 ,降低辐射量。

The Discussion of Image Processing Parameters in Computed Mammography

Objective To investigate the optimum of image processing parameters in computed mammography for improving image quality and reducing X ray dose. Methods Three hundred cases of different breast type were studied with conventional mammography and computed mammography, the exposure parameters of the two techniques were compared. To determine the best image processing parameters, 300 mammogram were evaluated both before and after modification of image processing parameters. Results Compared with conventional mammography, the dose of computed mammography can be reduce to 1/3 and 1/2.The best image processing parameters are GA=1.2; GT=G; GC=0.6; GS=0.3; RN=5; RT=P; RE=1.0. Conclusion Because the computed mammography system has very wide range of X ray intensities and tremendous latitude , hence, optimal selection and application of image processing parameters in computed mammography can improve image quality and reduce patient dose.