DETERMINATION OF T(2)ASTERISK RELAXATION-TIME FOR CHARACTERIZING TRABECULAR BONE
DETERMINATION OF T(2)ASTERISK RELAXATION-TIME FOR CHARACTERIZING TRABECULAR BONE
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DOI：
10.1055/s-2008-1032492
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发表时间：
1994-07-01
期刊：
影响因子：
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通讯作者：
GRABBE, E
中科院分区：
文献类型：
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作者：
FUNKE, M;BRUHN, H;GRABBE, E
松质骨产生局部磁场不均匀性，导致骨髓横向弛豫时间缩短。这种增加的信号衰减影响T2弛豫时间。对48例正常人和20例骨质疏松症患者的第4腰椎T2 ~* 时间进行了测量。使用了一种特殊的多梯度回波技术，根据水和脂肪信号的相位相干性选择回波时间。T2* 时间显示与年龄相关的轻微增加。与正常对照组（13.4 +/- 1.9 ms）相比，骨质疏松症患者的T2* 时间（19.9 +/- 3.8 ms）显著增加。从这些发现可以判断小梁结构的质量。
Spongy bone produces local magnetic field inhomogeneities and leads to shortening of the transverse relaxation time from bone marrow. This increased signal decay affects the T2 relaxation time. Measurements of the T2* time from the 4th lumbar vertebra were carried out in 48 normals and 20 patients with osteoporosis. A special multigradient echo technique was used, the echo times selected in relation to phase coherence of the water and fat signals. T2* times showed slight increase in relation to age. Patients with osteoporosis showed significantly increased T2* times (19.9 +/- 3.8 ms) compared to the normal control group (13.4 +/- 1.9 ms). From these findings it is possible to judge the quality of the trabecular structure.