Purpose To optimize the scan protocol for accurate quantitative computed tomography(QCT) bone mineral density(BMD) measurements with low radiation dose.Material and Methods European Spine Phantom(ESP) and QCT calibration Phantom(Image Analysis,Inc,US,G2208) were scanned with a Toshiba 16-sclice CT scanner.Tube voltage and tube current were 120KV and 50mA to 350mA.Slice thickness was 1 x 16mm with table height of 73cm.Scan range was 10cm.FOV was 40cm.Reconstruction matrix was 512×512 and reconstruction inter...
【基金】
北京市卫生系统高层次卫生技术人才培养项目(编号:2009-02-03)
【更新日期】
2012-01-04
【分类号】
R580
【正文快照】
定量CT(quantitative CT,QCT)是通过CT扫描将穿过人体的CT衰减系数经校准体模转换成以mg/cm3为单位的一种骨密度(bone mineral density,BMD)测量技术,这种技术可用于任何普通CT扫描机[1]。本研究旨在探讨CT扫描技术参数与骨密度、辐射剂量之间的相关性,并研究QCT不同重建参数对