Effects of compression and recovery on bovine articular cartilage: Appearance on MR images
Effects of compression and recovery on bovine articular cartilage: Appearance on MR images
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DOI：
10.1148/radiology.201.3.8939241
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发表时间：
1996-12-01
期刊：
影响因子：
19.7
通讯作者：
Henkelman, RM
中科院分区：
文献类型：
--
作者：
Rubenstein, JD;Kim, JK;Henkelman, RM
目得：为了确定压缩和减压对牛关节软骨的影响，因为它出现在磁共振（MR）图像。材料和方法：连续自旋回波MR图像（重复时间毫秒/回波时间毫秒= 800/33）的正常牛软骨，获得了增加的压力增量，最大为4.14 MPa（600 psi）;释放压力后进行连续MR成像。结果：压缩前，软骨呈分层外观。在递增压力后，软骨厚度逐渐减小;短T2，低信号强度的板层在关节面变得更厚，更清晰;软骨深层的信号强度最初很高，然后逐渐降低;在最大压力下，软骨显示均匀的低信号强度。释放压力后，软骨中的信号强度变化依次从压缩观察到的信号强度变化逆转。图像分辨率和回波时间影响这些发现的外观，特别是低信号强度线在软骨interfaces.CONCLUSION：不同的外观和信号强度特性的压力下的软骨被假设为导致从一个组合的净水分流失和胶原蛋白取向结构的改变。
PURPOSE: To determine the influence of compression and decompression on bovine articular cartilage as it appears on magnetic resonance (MR) images.MATERIALS AND METHODS: Consecutive spin-echo MR images (repetition time msec/echo time msec = 800/33) of normal bovine cartilage were obtained with increasing increments of pressure, to a maximum of 4.14 MPa (600 psi); this was followed by consecutive MR imaging after release of the pressure.RESULTS: Before compression, cartilage showed a laminated appearance. After incremental pressure, cartilage thickness progressively decreased; a short T2, low-signal-intensity lamina became thicker and more distinct at the articular surface; signal intensity of the deep cartilage zone initially was high and then gradually decreased; and at maximum pressure, the cartilage showed uniform low signal intensity. After release of pressure, signal intensity changes in the cartilage were sequentially reversed from those observed with compression. Image resolution and echo time influenced the appearance of these findings, particularly the low-signal-intensity line at the cartilage interface.CONCLUSION: The varying appearance and signal intensity characteristics of cartilage under pressure are hypothesized to result from a combination of net water loss and alteration in collagen orientational structure.