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以羊腰椎体骨煅烧后的灰重密度为标准，比较能谱CT与双能X线骨密度仪（DXA）测量椎体骨密度（BMD）的准确性，探讨能谱CT对BMD的测量价值。 方法：选取36节新鲜市售羊腰椎椎体作为研究对象，清除椎体周围软组织及其附件后，分别采用能谱CT与DXA测量BMD，然后煅烧椎体得到灰重密度。将两种方法测量所得BMD值与灰重密度值进行比较，同时分析两种方法测量所得BMD值与灰重密度值的相关性；最后将能谱CT...
Segmental Musculoskeletal Examinations using Dual-Energy X-Ray Absorptiometry (DXA):Positioning and Analysis Considerations
Segmentation muscle bone standardisation composition regional method
2016/1/9
Musculoskeletal examinations provide informative and valuable quantitative insight into muscle and bone health. DXA is one mainstream tool used to accurately and reliably determine body composition co...
Quantitative Computerized Tomography (QCT) versus Dual X-Ray Absorptiometry (DXA) in the Assessment of Bone Mineral Density of HIV-1 Infected Children
Bone Mineral Density HIV-Infected Children CT DXA
2013/2/19
Bone studies of HIV-infected children using dual X-ray absorptiometry (DXA) suggest bone mineral density (BMD) abnormalities. Pediatric studies are often performed using DXA instead of computed tomogr...
外源性脂肪对DXA测量健康女性骨密度结果的正性与负性作用
骨密度 脂肪 双能X线测量
2012/12/12
观察外源性脂肪对Hologic QDR4500A型双能Ｘ线吸收测量法(dual energy X-ray absorptiometer，DXA)测量健康成年女性不同部位骨密度结果的影响。方法：准备5与10 cm厚的猪腹部脂肪垫各1块。测量37名健康成年女性（A组）腹部依次放置两种厚度脂肪垫前后的腰椎骨密度、18名女性（B组）髋部放置此两种厚度脂肪垫前后的髋部骨密度，以及8位女性(C组)腹部放置5 ...
外源性脂肪对DXA测量骨密度结果的影响
外源性脂肪 DXA测量骨密度
2009/6/25
目的：观察外源性脂肪对DXA(Hologic QDR4500A型)测量腰椎模型骨密度(bone mineral density,BMD)结果的影响。方法：准备不同厚度的猪脂肪（猪油和炼油各2块，5 cm和10 cm厚），放置在腰椎模型上，测量放置前后的BMD。结果：放置不同厚度猪油后只有L1的BMD下降有统计学意义(P＜0.05)；放置5 cm厚炼油时BMD，骨量（BMC），骨面积（BA）大都显著...
Correlation between QUS of Phalanx and DXA in Assessment of Bone Structure of Postmenopausal Women
QUS of phalanx DXA BMD Osteoporosis
2010/2/1
This study planned for finding the agreement DXA and quantitative ultrasound (QUS) of phalanx in osteoporosis diagnosis and cut off point of QUS for osteoporosis diagnosis in postmenopausal women. In ...
DXL of calcaneus is a portable method for BMD. This study determined a cut off point for DXL in osteoporosis diagnosis. In 510 healthy postmenopausal women, BMD of axial regions with DXA (DPX-MD, GE,L...