INCREASED RADIATION-DOSE AT MAMMOGRAPHY DUE TO PROLONGED EXPOSURE, DELAYED PROCESSING, AND INCREASED FILM DARKENING

被引:26
作者
KIMMESMITH, C
BASSETT, LW
GOLD, RH
CHOW, S
机构
[1] Iris Cantor Ctr. for Breast Imaging, Department of Radiological Sciences, UCLA Medical Center, Los Angeles, CA 90024-6916
关键词
BREAST RADIOGRAPHY; QUALITY ASSURANCE; RADIATION DOSE; TECHNOLOGY;
D O I
10.1148/radiology.178.2.1987598
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Four single-emulsion films introduced over the past 2 years-Du Pont Microvision, Fuji MiMa, Konica CM, and Eastman Kodak OM-were compared with Eastman Kodak OM SO-177 (Min-RE) film to evaluate their varying effects on mean glandular dose of reciprocity law failure due to prolonged exposure, delayed processing, and increased film darkening as a result of increased radiation exposure to improve penetration of glandular tissue. Exposures over 1.3 seconds led to increased radiation doses of 20%-30%. Delays in processing of 6 hours decreased processing speed by 11%-32% for all films except Du Pont Microvision. Optical density increases of 0.40 required 20%-30% more skin exposure for all five films. Optimal viewing densities were also evaluated and found to be different for each of the five films. Mammographers need to be aware of these differences in mammographic films to achieve maximum contrast at mammography.
引用
收藏
页码:387 / 391
页数:5
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