| 高冰,张源,黄世豪,崔旋,赵越,郁万江.低剂量定量CT测量不同体质量指数人群腰椎骨密度的准确性[J].中国医学影像技术,2021,37(9):1401~1404 |
| 低剂量定量CT测量不同体质量指数人群腰椎骨密度的准确性 |
| Accuracy of low-dose quantitative CT for measuring lumbar bone mineral density in people with different body mass index |
| 投稿时间：2020-10-15 修订日期：2021-07-05 |
| DOI：10.13929/j.issn.1003-3289.2021.09.030 |
| 中文关键词: 骨密度 体质量指数 体层摄影术,X线计算机 低剂量 |
| 英文关键词:bone density body mass index tomography, X-ray computed low-dose |
| 基金项目: |
| 作者 | 单位 | E-mail | | 高冰 | 青岛大学附属青岛市市立医院放射科, 山东 青岛 266011
大连医科大学研究生院, 辽宁 大连 116044 | | | 张源 | 青岛大学附属青岛市市立医院放射科, 山东 青岛 266011
大连医科大学研究生院, 辽宁 大连 116044 | | | 黄世豪 | 青岛大学附属青岛市市立医院放射科, 山东 青岛 266011
大连医科大学研究生院, 辽宁 大连 116044 | | | 崔旋 | 青岛大学附属青岛市市立医院放射科, 山东 青岛 266011
潍坊医学院研究生院, 山东 潍坊 261053 | | | 赵越 | 青岛大学附属青岛市市立医院放射科, 山东 青岛 266011 | | | 郁万江 | 青岛大学附属青岛市市立医院放射科, 山东 青岛 266011 | yuwj169@sina.com |
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| 中文摘要: |
| 目的 评估低剂量定量CT（QCT）测量不同体质量指数（BMI）人群腰椎体积骨密度（vBMD）的准确性。方法 对80例临床疑诊骨质疏松症患者行腰椎L1~L3常规QCT扫描及低剂量QCT扫描，根据BMI将其分为体质量正常组（BMI<24 kg/m2，n=29）、超重组（24 kg/m2≤BMI<28 kg/m2，n=27）和肥胖组（BMI≥28 kg/m2，n=24）；记录2种扫描的容积CT剂量指数（CTDIvol）和剂量长度乘积（DLP），比较其所示椎体整体vBMD、各椎体vBMD以及各组椎体vBMD的差异及2种测量结果的相关性。结果 QCT与低剂量QCT扫描所示整体vBMD、各椎体vBMD及3组整体vBMD差异均无统计学意义（P均>0.05）；所测vBMD均呈正相关，r值0.96~0.99（P均<0.05）。QCT扫描的CTDIvol为（26.32±3.42）mGy，DLP为（387.39±16.41）mGy·cm；低剂量QCT扫描的CTDIvol为2.18 mGy，DLP为（33.04±4.95）mGy·cm。结论 低剂量QCT测量腰椎vBMD对于不同BMI人群的准确性均较好。 |
| 英文摘要: |
| Objective To investigate the accuracy of low-dose quantitative CT (QCT)for measurement of lumbar volumetric bone mineral density (vBMD) in people with different level of body mass index (BMI). Methods Totally 80 patients with clinically suspected osteoporosis underwent lumbar L1-L3 routine QCT and low-dose QCT scanning. According to BMI, the patients were divided into normal weight group (BMI<24 kg/m2,n=29), overweight group (24 kg/m2≤BMI<28 kg/m2, n=27) and obesity group (BMI≥28 kg/m2,n=24). The volume CT dose index (CTDIvol) and dose length product (DLP) were recorded. The vBMD of the whole vertebral bodies, of each vertebral body and of 3 groups under different CT scanning were compared, respectively, the correlations of results of QCT and low-dose QCT scanning were analyzed. Results Under QCT and low-dose QCT scanning, there was no significant difference of lumbar vBMD of the whole vertebral bodies, vBMD of each vertebral body nor vBMD amomg 3 group (all P>0.05).Positive correlations were found among vBMD of QCT and low-dose QCT scanning, with r values of 0.96-0.99 (all P<0.05). Under QCT scanning, patients' CTDIvol and DLP were (26.32±3.42) mGy and (387.39±16.41) mGy·cm, respectively, while under low dose QCT scanning were 2.18 mGy and (33.04±4.95) mGy·cm, respectively. Conclusion The accuracy of low-dose QCT for measuring lumbar vBMD in people with different level BMI were all satisfied. |
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