儿童和青少年CT扫描与DEXA扫描骨矿物质密度的比较
Kosei Nagata1,2, Steven D Glassman1,2, John R Dimar1,2
1Department of Orthopaedic Surgery, University of Louisville School of Medicine, Louisville, KY.
Spine
|November 16, 2023
概括
计算机断层扫描 (CT) 上的Hounsfield单位 (HU) 可以作为儿童骨矿物质密度 (BMD) 的代理. 患有低骨质量的儿科患者的较低HU值表明CT可以评估骨健康.
科学领域:
- 儿科放射学 儿科放射学
- 骨密度测试 骨密度测试 骨密度测试
- 医学成像分析 医学成像分析
背景情况:
- 儿童的骨矿物质密度 (BMD) 评估对骨健康至关重要.
- 在CT扫描上,霍恩斯菲尔德单位 (HU) 被用作成年人骨硬化指标的代理值.
- 在儿科患者群体中,CT衍生的HU对骨硬度评估的实用性仍未得到充分研究.
研究的目的:
- 在儿童和青少年中调查CT扫描和双能X射线吸收计 (DEXA) 测量中的Hounsfield单位 (HU) 之间的关联.
- 评估CT扫描作为一个潜在的工具来估计儿科患者的BMD.
主要方法:
- 涉及儿科患者 (<18岁) 的回顾性横截面研究,同时进行腰椎CT和DEXA扫描.
- 兴趣区域分析以测量CT上的腰椎体的HU.
- 在DEXA Z-score和CT-derived HU值之间进行相关性分析,并对年龄,性别和BMI进行匹配.
主要成果:
- 在平均DEXAZ分数和平均HU值之间观察到中等相关性 (r2=0.42,P<0.001).
- 与健康,匹配的对照人群相比,DEXA Z-score ≤-2.0 的患者表现出明显较低的平均HU (176.54 vs. 231.69).
结论:
- 腰部CT扫描上的Hounsfield单位显示,它有可能成为儿科患者骨矿物质密度的替代标记物.
- 脊椎的机会性CT扫描可能有助于识别患有低骨密度的儿童,需要进一步调查.
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