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| 定量CT测量腹部脂肪面积及分布的重复性研究 |
| The reproducibility of abdominal fat area and distribution measured by QCT |
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| DOI： |
| 中文关键词: 体层摄影术 载线计算机 腹部脂肪 重复性 测量 |
| 英文关键词:Tomography X -ray computed, Abdominai adipose Reproducibility MeasuremeiU |
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| 中文摘要: |
| 目的研究采用定量悦栽骨密度（QCT)方法测量腹部脂肪面积及分布的重复性。方法以到 北京积水潭医院进行腰椎QCT骨密度检查的30例（女15例，男15例）患者为测量对象，采用QCT分 析软件中的“七泽怎藻composiLion”功能定量测量L2、L3、蕴源、L5椎体中心层面的腹部脂肪面积（TAA )及 腹内脂肪面积（VAA)，两者相减得皮下脂肪面积（SAA)。由3名经过严格培训的放射医生独立进行 测量，并记录每次TAA及VAA测量用时。用重复测量方差分析及组内相关系数（ICC )评价3名不同 观察者测量间及同一观察者不同时间两次测量的重复性。结果3名不同测量者及同一测量者前后 两次测量L2、L3、蕴4、L5椎体中心层面TAA及VAA的均值无统计学显著差异（孕>0. 05 )；名测量者 及同一测量者两次不同时间测量L2、L3、蕴4、L5椎体中心层面TAA及VAA测量值之间高度一致（ICC >0. 900 )。L2、L3、蕴4、L5 椎体中心层面平均 SAA/VAA 比分别为 1. 14 土 0. 58、1. 46 土 0. 81、2. 00 土 1.08、. 23依1.04。使用该方法测量单层面TAA及VAA所需时间为3耀6 min，平均约5 min。结论 定量CT测量腹部脂肪具有准确、可重复及快速等特点。该方法在测量椎体骨密度的同时，可区域 性、简单、直观的评价皮下及腹内脂肪分布 |
| 英文摘要: |
| Objective To assess the reproducibility of QCT in measuring ahdominal adipose area and distribution. Methods The total adipose area( TAA )and the visceral adipose area( VAA )in the middle level of L2-L5 vertebra of 30 patients were measured by 3 radiologists independently, and one radiologist measured Lwice. The tissue composiLion moduie of Mindways QCT software was used. . The Lime spent for every TAA and VAA was recorded. The inter-observer and the intra-observer reproducibility were analyzed using intraclass correlation coeilicient ( ICC ) and repealed-measures AN OVA. Results There was no significant difference among the results of the inter-observer or the intra-observea(孕 > 0. 05 ). The inter-observer and the intra-observer reproducibility was excellen( ICC >0.900 ). The mean SAA/VAA ratio of L2, L3 , L4, L5 level were 1. 14 ±0. 58 ,1.46 ±0. 81 ,2. 00 ± 1. 08 ,2. 23 ±1. 04 individually. The mean tmie spent was ^ minutes( 3 耀 6 minuLes ). Conclusions QCT is accurate，reproducible，and fast in the analysis of abdominal adiposity. It is a regional and easy technique for evaluation of subcutaneous and visceral fat compartments |
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