A clinical comparison between conventional and digital mammography utilizing computed radiography.
A clinical comparison between conventional and digital mammography utilizing computed radiography.
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利用计算机放射线照相技术进行传统乳房X线照相术和数字乳房X线照相术之间的临床比较。
DOI：
10.1259/0007-1285-67-797-464
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
H J Sumsion
中科院分区：
文献类型：
--
作者：
D. Brettle;S C Ward;G. Parkin;A. Cowen;H J Sumsion
以前使用专门设计的乳房X光照相测试对象的工作已经表明，计算机射线照相(CR)的图像质量接近于同等照相速度的传统胶片屏幕技术。为了将这些结果与临床情况相关联，对噪声、清晰度和对比度等主要物理参数进行了主观评级研究。使用随机观察序列，要求两名在乳房X光检查方面经验丰富的放射科医生利用5分制对这些参数进行评分。总共使用了138张图像，其中62%没有异常，38%包含微钙化、肿块或两者兼而有之。此外，观察者对正确分类的置信度进行了评分，然后将这些结果用于构建接收器操作特征(ROC)曲线。物理参数结果的主观评级产生了与使用测试对象获得的结果相似的结果，CR图像提供了比胶片更大的对比度。然而，CR的分辨率低于胶片。总体而言，两种模式的噪音水平相似，但数字图像偶尔包含高水平的灰尘伪影。在一个病例中，这些伪影被误认为是一簇微钙化。测试对象结果和参数评级结果表明，CR接近电影屏幕图像的性能。从统计上看，产生的ROC曲线表明CR图像可与胶片-屏幕组合相媲美。这可能是因为增加的对比度补偿了分辨率的限制，这些发现与我们的临床经验相关。
Previous work utilizing a specially designed mammographic test object has indicated that the image quality of computed radiography (CR) approaches that of a conventional film-screen technique of equivalent radiographic speed. In an attempt to correlate these results with the clinical situation a subjective rating study of the primary physical parameters of noise, sharpness, and contrast has been conducted. Using a randomized viewing sequence two radiologists experienced in mammography were asked to score these parameters utilizing a 5 point scale. A total of 138 images was used, 62% containing no abnormalities and 38% containing either microcalcifications, masses or both. Additionally, the observers scored their confidence of correct classification, and these results were then used to construct receiver operating characteristic (ROC) curves. The subjective rating of the physical parameters results produced similar results to those obtained using the test object, with CR images providing greater contrast than film. The resolution of CR, however, was lower than for film. Overall the noise levels were similar for both modalities, but the digital images occasionally contained high levels of dust artefacts. In one case these artefacts were mistaken for a cluster of microcalcifications. The test object results and the parameter rating results indicate that CR approaches the performance of film-screen images. Statistically the ROC curves produced indicate CR images to be comparable to the film-screen combination. This may be because the increased contrast compensates for resolution limitations and these findings correlate with our clinical experience.
影响因子：
6.7
作者：
Getty,DJ;Pickett,RM;D'Orsi,CJ;Swets,JA
通讯作者：
Swets,JA