Dual-photon Gd-153 absorptiometry of bone.
Dual-photon Gd-153 absorptiometry of bone.
复制标题
双光子 Gd-153 骨吸收测定法。
作者：
H. Wahner;W. Dunn;R. Mazess;M. Towsley;R. Lindsay;L. Markhard;D. Dempster
用钆153双光子吸收法测定了尸体腰椎、带髓离体椎骨和干燥无髓椎骨的矿物质含量。尸体周围软组织引入的误差为3%，在测定离体椎骨中的矿物质质量或密度时的误差约为5%。24例股骨颈Gd-153与校正的碘-125（单光子）吸收法测定结果的相关系数为0.99，预测误差为3.7%。双光子骨密度仪能准确显示骨量和骨密度，并且仅受周围组织或骨髓中脂肪变化的轻微影响。
Dual-photon absorptiometry with gadolinium 153 was used to measure the mineral content of lumbar vertebrae in cadavers, excised vertebrae with marrow, and dry, marrow-free vertebrae. The error introduced by the surrounding soft tissue of cadavers was 3%, and the error in determining mineral mass or density in excised vertebrae was about 5%. The correlation coefficient between the results of Gd-153 and corrected iodine 125 (single-photon) absorptiometry on 24 femoral necks was 0.99, and the predictive error was 3.7%. Dual-photon absorptiometry accurately indicates bone mass and bone density and is only slightly affected by either surrounding tissue or fat changes in bone marrow.