Conway B J, McCrohan J L, Rueter F G, Suleiman O H
Food and Drug Administration, Center for Devices and Radiological Health, Rockville, MD 20857.
Radiology. 1990 Nov;177(2):335-9. doi: 10.1148/radiology.177.2.2217765.
Mammography has experienced the greatest change of any existing radiologic examination in recent years. In 1985, as a part of the Nationwide Evaluation of X-Ray Trends (NEXT) program, a national survey was conducted of a statistically selected sample (n = 232) of facilities performing mammography examinations in the United States. By 1988, the number of mammography facilities in the United States had increased to over 6,400, an increase of over 60% from the 1985 level. To assess the consequence of this expansion as well as the impact of recent technological and other significant developments on mammography, a NEXT survey of mammography facilities was repeated in 1988 (n = 226). Screen-film mammography accounted for 83% of the facilities surveyed in 1988, and dedicated equipment dominated screen-film systems (99%). There was a 26% increase in the overall mean phantom image score, over 45% increase in the use of grids, and 10% increase in mean glandular dose for systems using grids.
近年来，乳房X线摄影术是现有放射学检查中变化最大的。1985年，作为全国X射线趋势评估（NEXT）项目的一部分，对美国进行乳房X线摄影检查的机构进行了一次全国性调查，从统计学角度选取了一个样本（n = 232）。到1988年，美国乳房X线摄影检查机构的数量增加到了6400多家，比1985年的水平增长了60%以上。为了评估这种扩张的后果以及近期技术和其他重大发展对乳房X线摄影术的影响，1988年对乳房X线摄影检查机构再次进行了NEXT调查（n = 226）。1988年接受调查的机构中，屏-片乳房X线摄影术占83%，专用设备在屏-片系统中占主导地位（99%）。整体平均体模图像评分提高了26%，滤线栅的使用增加了45%以上，使用滤线栅的系统的平均腺体剂量增加了10%。
