Hermann K P, Obenauer S, Marten K, Kehbel S, Fischer U, Grabbe E
Department of Diagnostic Radiology, Georg-August-University of Göttingen, Germany.
Rofo. 2002 Jun;174(6):696-9. doi: 10.1055/s-2002-32221.
Determination of average glandular dose with a full-field digital mammography system using a flat-panel X-ray detector based on amorphous silicon technology for a large group of patients.
The patient group includes women who were examined in a 4-month period with the digital mammographic system Senographe 2000D. The number of women was 591 and the number of exposures was 1116; only cranio-caudal projections were considered. Various quantities, including entrance surface air kerma, tube loading, and compressed breast thickness, were determined during actual mammography. Average glandular dose was determined using conversion factors g for standard breast composition.
The mean average glandular dose was 1.51 mGy (0.66 - 4.05 mGy) for a single view. The mean compressed breast thickness was 55.7 mm. The mean age of patients was 55 years (34 - 81 years).
The results demonstrate that full-field digital mammography with a flat-panel detector based on amorphous silicon needs about 25 % less dose in comparison with conventional screen-film mammography.
使用基于非晶硅技术的平板X射线探测器的全场数字化乳腺摄影系统，测定一大组患者的平均腺体剂量。
患者组包括在4个月内使用数字化乳腺摄影系统Senographe 2000D进行检查的女性。女性人数为591人，曝光次数为1116次；仅考虑头尾位投照。在实际乳腺摄影过程中测定了包括入射表面空气比释动能、管负载和压缩乳腺厚度等各种量。使用标准乳腺组成的转换因子g确定平均腺体剂量。
单视图的平均腺体剂量为1.51 mGy（0.66 - 4.05 mGy）。平均压缩乳腺厚度为55.7 mm。患者的平均年龄为55岁（34 - 81岁）。
结果表明，与传统屏-片乳腺摄影相比，基于非晶硅的平板探测器全场数字化乳腺摄影所需剂量约少25%。
