关节软骨MR影像表现特点和各种影响因素

目的探讨关节软骨的ＭＲＩ表现特点以及各种因素对软骨层次、厚度和信号强度的影响。方法取１２只新鲜人膝关节标本，行各种位置和序列的ＭＲ成像。标本脱钙、切片、染色后用偏光显微镜观察。结果ＭＲＩ上关节软骨的厚度、层次和信号强度与软骨内纤维排列方向、软骨基质的含量、各区域宽度、容积效应、化学位移、各向异性和成像序列密切相关。结论ＭＲＩ检查判断关节软骨结构需兼顾年龄和其他诸多技术因素

MRI characteristics of articular cartilage and the infuencing factors

Objective To probe into MRI characteristics of articular cartilage and various influencing factors. Methods Twelve specimens of fresh human knee were examined by MRI with various orientation and sequences. The specimen was sliced, decalcified, stained with hematoxylin and eosin, and examined with polarized light microscopy. Results The thickness, laminar appearance and signal intensity of articular cartilage on MRI were correlated with orientation of the collagen structure, water content, age of patient, partial volume effect, chemical shift, anisotropy and imaging sequences. Conclusions In order to evaluate articular cartilage with MRI, attention must be given to age of patient and the various technical parameters.