Imaging performance of a prototype scanned-slot digital mammography system
Imaging performance of a prototype scanned-slot digital mammography system
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原型扫描槽数字乳腺X线摄影系统的成像性能
DOI：
10.1117/12.154579
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
B. Starkoski
中科院分区：
文献类型：
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作者：
Andrew D. A. Maidment;M. Yaffe;D. Plewes;G. Mawdsley;I. Soutar;B. Starkoski
一种临床扫描槽式数字乳房x线摄影成像系统的原型已经开发出来，它比目前最先进的胶片屏幕乳房x线摄影系统具有更好的对比灵敏度和纬度。该探测器由一个Gd2O2S:Tb荧光粉屏与两个延迟集成（TDI）电荷耦合器件（CCD）图像阵列通过2比1的衰减光纤锥度耦合组成。用21厘米长的探测器在图像场上扫描4.0毫米宽的图像获得图像。一张18厘米× 21厘米的图像包含2900 × 4032像素，探测器的尺寸为62微米× 52微米。目前，使用40 kV钨靶光谱，总热负荷为50 kJ，在7.8秒内产生图像，对于5厘米厚的50%腺体，50%脂肪的乳房，平均腺体剂量为0.85 mGy （85 mrad）。该探测器的极限分辨率为9.5 lp/mm。该原型的临床版本正在构建中，其中包含了几项改进。
A prototype of a clinical scanned-slot digital mammography imaging system has been developed, which demonstrates better contrast sensitivity and latitude than current state-of-the- art film-screen mammography systems. The detector consists of a Gd2O2S:Tb phosphor screen coupled via a 2-to-1 demagnifying fiber-optic taper to two time-delay integration (TDI) charge-coupled device (CCD) image arrays. Images are obtained by scanning the 4.0 mm wide by 21 cm long detector across the image field. An 18 cm by 21 cm image contains 2900 by 4032 pixels, of dimension 62 micrometers X 52 micrometers at the detector. Currently, images are produced in 7.8 seconds using a 40 kV tungsten-target spectrum with a total heat load of 50 kJ, giving a mean glandular dose of 0.85 mGy (85 mrad) to a 5 cm thick 50% glandular, 50% adipose breast. The detector has a limiting resolution of 9.5 lp/mm. A clinical version of this prototype, which incorporates several improvements, is being constructed.