对比细节可探测性分析：数字乳腺摄影系统与模拟屏-片乳腺摄影系统的比较

Contrast-detail detectability analysis: comparison of a digital spot mammography system and an analog screen-film mammography system.

作者信息

Liu H, Fajardo L L, Barrett J R, Baxter R A

机构信息

Department of Radiology, University of Virginia School of Medicine, Charlottesville, VA, USA.

出版信息

Acad Radiol. 1997 Mar;4(3):197-203. doi: 10.1016/s1076-6332(05)80291-0.

DOI:10.1016/s1076-6332(05)80291-0

PMID:9084777

Abstract

RATIONALE AND OBJECTIVES

The authors compared the contrast-detail detectability properties of an optically coupled charge-coupled device (CCD) digital mammography system with those of a conventional analog screen-film mammography system.

METHODS

A proprietary contrast-detail phantom was imaged with both systems. Twelve observers viewed analog and digital images obtained at seven different mean glandular doses. Contrast-detail-dose curves were generated on the basis of the readers' visual perceptions. Interobserver errors were also calculated. In addition, the authors applied a theoretical model for lesion detectability to calculate and compare the digital and analog mammography systems.

RESULTS

The readers' contrast-detail detectability was significantly superior with the digital system in the detail and contrast ranges evaluated (P < .001).

CONCLUSION

The performance of the readers paralleled the performance predicted by the theoretical model for the two imaging systems. The following features account for the superior performance of the digital mammography system: (a) higher quantum efficiency of the phosphor, (b) wider dynamic range, (c) better contrast transfer characteristics, and, most important, (d) greater photon flux at the phosphor entrance.

摘要