| 涂宁,文之,朱凌,刘博,冯晓波,汪长银,吴光耀.双能CT评估骨密度[J].中国医学影像技术,2014,30(9):1391~1394 |
| 双能CT评估骨密度 |
| Dual-energy CT in assessment of bone mineral density |
| 投稿时间：2014-03-05 修订日期：2014-06-25 |
| DOI： |
| 中文关键词: 放射摄影术 体层摄影术,X线计算机 骨密度 |
| 英文关键词:Radiography Tomography, X-ray computed Bone density |
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| 中文摘要: |
| 目的 评价利用双能CT（DECT）测量容积CT值评估骨密度（BMD）的可行性。方法 对11名志愿者采用双能X线吸收法（DXA）测量腰椎（L1~L4）及股骨（股骨颈）BMD值；并对所有研究对象进行DECT检查，获得钙值图，测量容积CT值，分析容积CT值与BMD值的相关性。结果 腰椎容积CT值与BMD值呈显著正相关（r=0.82，P<0.001；相关函数为Y=0.004X-0.879，其中Y为BMD值，X为容积CT值）；股骨容积CT值与DXA所测BMD值无明显相关性（P>0.05）。结论 DECT所测腰椎容积CT值与DXA所测BMD值密切相关，可定量反映腰椎BMD变化。 |
| 英文摘要: |
| Objective To evaluate the feasibility of dual-energy CT (DECT) based measurement of volume CT value in assessing bone mineral density (BMD). Methods Totally 11 volunteers were enrolled and underwent dual X-ray absorptiometry (DXA) to obtain BMD and DECT to obtain calcium value map for measurement of volume CT value in lumbar spines (L1-L4) and femoral necks. The correlation of volume CT value and BMD was analyzed. Results The volume CT value was positively correlated with BMD (r=0.82, P<0.001) in lumbar spines, with correlation function of Y=0.004X-0.8791 (Y: DXA BMD value, X: volume value). The volume CT value was not significantly correlated with BMD (P>0.05) in femoral necks. Conclusion Volume CT values measured by DECT is closely correlated with BMD value measured by DXA in lumbar spines, which can indicate quantitatively BMD. |
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