DUAL-ENERGY MAMMOGRAPHY - A DETECTOR ANALYSIS
DUAL-ENERGY MAMMOGRAPHY - A DETECTOR ANALYSIS
复制标题
DOI：
10.1118/1.596548
复制
发表时间：
1990-07-01
期刊：
影响因子：
3.8
通讯作者：
TECOTZKY, M
中科院分区：
文献类型：
--
作者：
BOONE, JM;SHABER, GS;TECOTZKY, M
使用计算机模拟检查采用单次技术的双能乳腺 X 线摄影采集场景。由于其与暴露无关，因此选择信噪比除以腺剂量平方的品质因数用于优化任务。使用蒙特卡罗技术评估剂量。研究了千伏电压、患者前过滤、前检测器厚度、中检测器过滤厚度和成分的影响。在研究的六个探测器对（Y2O2S/Gd2O2S、SrFBr/BaFBr、Y2O2S/LaOBr、Y2O2S/CaWO4、Y2O2S/YTao4 和 Y2O2S/LuTaO4）中，Y2O2S/Gd2O2S 和 SrFBr/BaFBr 被发现是最佳组合。还检查了散射和信号量化的影响。引入了另一种显示技术，通过该技术将组织扣除（即钙）图像着色并覆盖到传统的乳房X光照片上。
Dual-energy mammography acquisition scenarios employing single-shot techniques are examined using computer simulation. A figure of merit of the signal-to-noise ratio squared over the glandular dose was chosen for the optimization task due to its exposure independence. Doses were evaluated using Monte Carlo techniques. The effects of kilovoltage, prepatient filtration, front detector thickness, mid-detector filtration thickness and composition were studied. Of the six detector pairs studied (Y2O2S/Gd2O2S, SrFBr/BaFBr, Y2O2S/LaOBr, Y2O2S/CaWO4, Y2O2S/YTao4, and Y2O2S/LuTaO4), Y2O2S/Gd2O2S and SrFBr/BaFBr were found to be the best combinations. The effects of scatter and signal quantization were also examined. An alternative display technique whereby the tissue-subtracted (i.e., calcium) image is colorized and overlaid onto the conventional mammogram is introduced.