Chua S L
Department of Radiology, Mount Elizabeth Hospital, Singapore.
Ann Acad Med Singap. 1993 Nov;22(6):921-6.
Magnetic resonance imaging (MRI) of the knee is fast assuming a major role in evaluating disorders of the knee. The major advantage of MRI is that it is a totally non-invasive procedure with superior soft tissue contrast resolution and multi-planar capabilities. In contrast to arthrography, intra-articular as well as extra-articular structures in the knee can be evaluated by MRI. Indications include studying abnormalities of the menisci, ligament, patella and quadriceps mechanisms, articular cartilage, bone, bursa and other soft tissue. A review of the literature comparing MRI to arthrography and arthroscopy of the knee, especially in relation to meniscal injuries and anterior cruciate ligament tears, shows wide ranges in the accuracy rates of MRI. There are pitfalls in the interpretation of meniscal tears on MRI like normal variants, tears at the free edge and healed or previously repaired tears. Arthrography remains a useful diagnostic modality in some of these settings.
膝关节的磁共振成像（MRI）发展迅速，在评估膝关节疾病中发挥着重要作用。MRI的主要优势在于它是一种完全非侵入性的检查方法，具有卓越的软组织对比分辨率和多平面成像能力。与关节造影不同，MRI可以评估膝关节的关节内和关节外结构。其适应证包括研究半月板、韧带、髌骨和股四头肌机制、关节软骨、骨骼、滑囊及其他软组织的异常情况。一篇比较MRI与膝关节造影及关节镜检查的文献综述，特别是关于半月板损伤和前交叉韧带撕裂的研究，显示MRI的准确率范围较广。MRI对半月板撕裂的解读存在一些陷阱，如正常变异、游离缘撕裂以及愈合或先前修复的撕裂。在某些情况下，关节造影仍然是一种有用的诊断方法。
