THE ERROR DUE TO FAT INHOMOGENEITY IN LUMBAR SPINE BONE-MINERAL MEASUREMENTS
THE ERROR DUE TO FAT INHOMOGENEITY IN LUMBAR SPINE BONE-MINERAL MEASUREMENTS
复制标题
DOI：
10.1088/0143-0815/10/1/006
复制
发表时间：
1989-02-01
期刊：
影响因子：
--
通讯作者：
WEBBER, CE
中科院分区：
文献类型：
--
作者：
FARRELL, TJ;WEBBER, CE
使用双光子吸收法测量骨矿物质质量依赖于这样的假设，即在光子束扫描的区域内脂肪厚度是恒定的。已使用存档CT扫描的单个和多个切片对该假设进行了测试。在26名患者中，发现骨骼和基线测量部位之间的脂肪含量差异（脂肪偏差）为-2.7%至18.7%。中位脂肪偏差为4.4%，这可能导致腰椎骨矿物质测量误差为6%至11%。大约三分之一的患者的错误率超过10%。
Bone mineral mass measurements using dual photon absorptiometry rely on the assumption that fat thickness is constant within the region scanned by the photon beam. This assumption has been tested using both single and multiple slices from archived CT scans. In 26 patients, the difference in fat content between the bone and baseline measurement sites, the fat deviation, was found to vary from-2.7 to 18.7%. The median fat deviation was 4.4% which can lead to errors in measured lumbar spine bone mineral of 6 to 11%. Approximately one third of patients have errors greater than 10%.