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ag网址双能X线骨密度仪及定量CT测量骨密度的比

时间:ag网址双能X线骨密度仪及定量CT测量骨密度的比

  双能X线骨密度仪及定量CT测量骨密度的比较研究_临床医学_医药卫生_专业资料。中文摘要 琵戆:跑较爻重两种不嗣豹臂密度测羹方法(OCT和泓)测定值 与获重密度的相关性以及磁琴孛不固的骨密度测量方法(蕊T和DXA) 测得体积骨密度的偏离度,进一步证实QCT测量骨密度的重要临

  中文摘要 琵戆:跑较爻重两种不嗣豹臂密度测羹方法(OCT和泓)测定值 与获重密度的相关性以及磁琴孛不固的骨密度测量方法(蕊T和DXA) 测得体积骨密度的偏离度,进一步证实QCT测量骨密度的重要临床应 用价值,胬在为临床上合理应用各种骨密度测量仪。 材料与方法:取15个猪腰稚稚体,去除周围软组织及附件,分 别耀Qcr及DXA嚣秘方法测量骨密痰,菇将各去附件椎体灰纯,将各 自测得的总骨矿含量及骨密度与灰化后得到的椎体的灰燕以及灰重 密度比较。计算出DXA测量的体积骨密度,进一步计算OCT测得的皮 质嚣密度、松质骨密度以及DXA测量得到盼体积骨密度分别相对灰重 密度盼偏离菠。 结果:OCT测褥松质骨密度、皮质骨密度分别与灰重、灰重密度 的相关性(松质骨密度与灰重相关系数r=O。9761,p<O.001:松质骨 密度与灰重密度相关系数r=O.9307,p<O.001:皮质骨密度与灰重相 关系数r=O.9436,p<O.001:皮质骨密度与灰重密度稆关系数 r=O。9397,p<O。001)。DXA测褥BMC与椎钵憋灰重相关系数 r=O.9995。p<O.001,DXA测得骨密度与灰重、灰重密度的相关性(DXA 测得骨密度与灰重相关系数r=O,9193,0.002<p<O.005,DXA测得骨密 度与获重密度褶关系数r=O.9174,p<O.001:DXA测得总骨矿含量与灰 重密度相关系数r=O。ag网址,8595,p<O。001)。 棚对灰重密度,对QCT测得松质骨密度偏离度及皮质骨密度偏 离度两者分别与DXA测量得到的体积骨密度的偏离度进行比较,均采 用计量资料的成组t检验,得到p<O.05,可以认为OCT测得体积密 度麴偏离度与转)【轰测量得到褥体积臂密度的偏离度不弱。QCT测褥松 质骨爨度的偏离度(平均值为0。1489)低于DXA测褥的体积骨密度 (用DXA测彳导BMC除以椎体体积)的偏离度(其平均值为0.2708)。 结论:本实验双能x线骨密度仪与定量CT测量骨密度的比较研 究实验表确:懿T耪DXA两稀方法都是翔断曾矿含量_和诊断骨质疏松 瘟比较好麴方法;QCT测量松厦骨密度更接_l凌予真实寮度;QCT测基 松质骨密度比DXA测量骨密度能更好、更准确地反映骨质疏松的骨代 谢变化。 关键词: 双能X线,臂密度,定量eT ABSTRACT Objective:To appreciate use ofdifferent bone densitometry in clinic. we compared the relationship of values measured by two difierent bone density measure methods(QCT and DXA)with bone ash density,the skewness of the volume BⅣ∞measured by two different bone density measuer methods(QCT and DXA)and further confirmed that QCT is accurate and worth applying in elinic. Materials and Methods:Fifteen pig lumbar vertebral bodies were recruited.After removal of surrounding parenchyma and adjunct.BMD was measured by both QCT and DxA.The adjunct-removed vertebrae were incinerated.ne gross BMC and BMD respectively measured by volume BⅧ QCT and DXA were compared with the bone ash weight and bone ash density of incinerated vertebrae.After calculated the skewness measured by DXA,we further calculated the of cortical BMD、 volume trabetical BMD measured by OCT and the BMD measured bv DXA compared with bone ash density. Results:the correlation oftrabetical BⅣD、 cortical B~∞ measured by QcT and bone ash weight、 bone ash density(the correlation toefficient oftrabetical BMD and bone ash weight r=0.9761. p<0.001):the correlation coe伍cient oftraberical BMD and bone ash density r=0.9307,p<0.001:the correlation coefficient ofcortical BMD and bone ash weight r=0.9436,P<O.001;the correlation coefficient of cortical BMD and bone ash density r=0.9397.p<O.001).the correlation coefficient ofBMC measured by DXA with vertebrae’S bone ash weight r=0.9995,p<0.001,the correlation o

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