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首页> 外文期刊>Radiology >Distal radius: in vivo assessment with quantitative MR imaging, peripheral quantitative CT, and dual X-ray absorptiometry.
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Distal radius: in vivo assessment with quantitative MR imaging, peripheral quantitative CT, and dual X-ray absorptiometry.

机译：远端半径：体内定量MR成像，外周定量CT和双X线吸收法评估。

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摘要

PURPOSE: To evaluate in vivo the relationship between magnetic resonance (MR) imaging relaxation time and bone mineral density (BMD) at the distal radius. MATERIALS AND METHODS: The 1/T2* MR imaging relaxation rates and dual X-ray absorptiometry (DXA) measurements were evaluated in the trabecular bone of the distal 5 cm of the radius in 14 healthy premenopausal women and 11 healthy postmenopausal women and in 11 women with osteoporosis. Trabecular and total BMD were measured with peripheral quantitative computed tomography (CT). RESULTS: In healthy women, 1/T2* values and trabecular BMD at peripheral quantitative CT were significantly correlated but 1/T2* and total BMD were not. Statistically significant (P = .03) correlations between 1/T2* and DXA were found only in the most distal area covered with DXA. The 1/T2* values were more closely correlated with age and showed higher relative annual decreases (0.47%-0.81%) than peripheral quantitative CT (0.20%-0.59%) or DXA (0.10%-0.39%). Pre- and postmenopausal healthy subjects could be distinguished only with MR imaging, and postmenopausal healthy and osteoporotic subjects only with CT and DXA. CONCLUSION: MR imaging relaxation rates correlate well with trabecular BMD in vivo.
机译：目的：在体内评估磁共振成像（MR）的弛豫时间与远端radius骨的骨矿物质密度（BMD）之间的关系。材料与方法：在14例健康的绝经前妇女和11例健康的绝经后妇女中，对the骨远端5 cm的骨小梁中的1 / T2 * MR成像弛豫率和双X线吸收法（DXA）进行了评估骨质疏松症的女性。用外周定量计算机断层扫描（CT）测量骨小梁和总骨密度。结果：在健康女性中，1 / T2 *值与小梁BMD在外周定量CT上显着相关，而1 / T2 *与总BMD则不相关。仅在被DXA覆盖的最远端区域发现了1 / T2 *和DXA之间的统计显着性（P = .03）相关性。 1 / T2 *值与年龄的相关性更高，并且相对年均下降幅度（0.47％-0.81％）比外围定量CT（0.20％-0.59％）或DXA（0.10％-0.39％）高。绝经前和绝经后的健康受试者只能通过MR成像加以区分，绝经后的健康和骨质疏松症的受试者只能通过CT和DXA进行区分。结论：磁共振成像的弛豫率与体内小梁骨密度密切相关。

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