Genant H K, Cann C E, Ettinger B, Gordan G S, Kolb F O, Reiser U, Arnaud C D
Department of Radiology, University of California at San Francisco 94143, USA.
J Comput Assist Tomogr. 1985 May-Jun;9(3):602-4. doi: 10.1097/00004728-198505000-00042.
Quantitative CT (QCT) is an established method for the noninvasive assessment of bone mineral content in the vertebral spongiosum and other anatomic locations. The potential strengths of QCT relative to dual photon absorptiometry (DPA) are its capability for precise three-dimensional anatomic localization providing a direct density measurement and its capability for spatial separation of highly responsive cancellous bone from less responsive cortical bone. The extraction of this quantitative information from the CT image, however, requires sophisticated calibration and positioning techniques and careful technical monitoring.
定量CT（QCT）是一种用于非侵入性评估椎体松质骨和其他解剖部位骨矿物质含量的既定方法。与双能光子吸收法（DPA）相比，QCT的潜在优势在于其能够进行精确的三维解剖定位，提供直接的密度测量，以及能够将高反应性的松质骨与低反应性的皮质骨在空间上分离。然而，从CT图像中提取这种定量信息需要复杂的校准和定位技术以及仔细的技术监测。
