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Spectral-detector based x-ray absorptiometry (SDXA): in-vivo bone mineral density measurements in patients with and without osteoporotic fractures
Biomedical Physics & Engineering Express ( IF 1.3 ) Pub Date : 2020-09-08 , DOI: 10.1088/2057-1976/abab6b
Alexis Laugerette 1, 2 , Thomas Baum 3 , Alexandra S Gersing 1 , Benedikt J Schwaiger 4 , Kevin Brown 5 , Lena C Frerking 6 , Nadav Shapira 7 , Daniela Pfeiffer 1 , Ernst J Rummeny 1 , Roland Proksa 6 , Franz Pfeiffer 1, 2, 8 , Peter B Noël 1, 7
Affiliation  

OBJECTIVES To study whether a dual-layer spectral CT scout scan-based areal BMD estimation method, called Spectral-detector based x-ray absorptiometry (SDXA), can differentiate patients with versus without osteoporotic fractures. METHODS The ability of the method to differentiate patients with osteoporosis was evaluated by assessing the areal BMD at the spine (L1 to L4) in a group of 19 patients presenting at least one fracture and comparing these results to the areal BMD of age- and gender-matched controls (57 patients). Finally, the reproducibility of SDXA was evaluated in-vivo through the calculation of coefficients of variation (CV), using three repeated analyses performed on each patient. RESULTS The average areal BMD of patients presenting fractures, measured with the scout scan-based method (0.86 ± 0.17 g cm-2), was found to be significantly lower than the average BMD of the control group (1.00 ± 0.17 g cm-2, p = 0.043). The reproducibility of the method in-vivo was found to be reasonable, with CVs ranging between 3.1 and 6.9%. CONCLUSIONS The results illustrate that the SDXA method for DXA-equivalent areal BMD estimation -delivers the ability to distinguish patients presenting osteoporotic fractures. Considering the total number of CT examinations worldwide, SDXA could develop to be a useful tool for truly opportunistic osteoporosis screening for a future clinical day-to-day routine.

中文翻译:

基于光谱检测器的 X 射线吸收测定法 (SDXA):在有和没有骨质疏松性骨折的患者中进行体内骨矿物质密度测量

目的 研究基于双层光谱 CT 侦察扫描的区域 BMD 估计方法,称为基于光谱检测器的 X 射线吸收测定法 (SDXA),是否可以区分患有与未患有骨质疏松性骨折的患者。方法 通过评估一组 19 名出现至少一次骨折的患者的脊柱(L1 至 L4)面积 BMD,并将这些结果与年龄和性别的面积 BMD 进行比较,评估该方法区分骨质疏松症患者的能力-匹配的对照(57 名患者)。最后,使用对每位患者进行的三次重复分析,通过计算变异系数 (CV) 在体内评估 SDXA 的重现性。结果 骨折患者的平均面积 BMD,采用基于侦察扫描的方法测量 (0.86 ± 0.17 g cm-2),发现显着低于对照组的平均 BMD (1.00 ± 0.17 g cm-2, p = 0.043)。发现该方法的体内重现性是合理的,CV 范围在 3.1% 和 6.9% 之间。结论 结果表明,用于 DXA 等效面积 BMD 估计的 SDXA 方法能够区分出现骨质疏松性骨折的患者。考虑到全球 CT 检查的总数,SDXA 可以发展成为一种有用的工具,用于真正的机会性骨质疏松症筛查,用于未来的临床日常工作。结论 结果表明,用于 DXA 等效面积 BMD 估计的 SDXA 方法能够区分出现骨质疏松性骨折的患者。考虑到全球 CT 检查的总数,SDXA 可以发展成为一种有用的工具,用于真正的机会性骨质疏松症筛查,用于未来的临床日常工作。结论 结果表明,用于 DXA 等效面积 BMD 估计的 SDXA 方法能够区分出现骨质疏松性骨折的患者。考虑到全球 CT 检查的总数,SDXA 可以发展成为一种有用的工具,用于真正的机会性骨质疏松症筛查,用于未来的临床日常工作。
更新日期:2020-09-08
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