摘要
目的评价MRI对膝关节V型骨挫伤的诊断价值及临床意义。方法从1672例急性膝关节外伤的MRI资料中筛选出具有V型骨挫伤的患者，分析其膝关节MRI表现。结果V型骨挫伤发生率2．6％（43／1672），表现为同时累及髌骨内下缘及股骨外髁前外缘的异常信号，在T1WI上表现为低信号，在T2WI上表现为等或稍高信号，在压脂PDWI上为高信号，在矢状面、冠状面及横断面上均可以敏感发现。MRI上显示骨折9例，软骨损伤29例，髌骨向外半脱位或脱位27例。髌骨内侧支持带损伤37例，在横断面上显示最佳并能进行分级。结论MRI能准确显示膝关节V型骨挫伤，对髌骨一过性脱位的诊断和治疗有重要意义。在MR检查中发现V型骨挫伤时应加作髌骨横断面检查，以评估髌骨内侧支持带的损伤情况。
Objective To explore the MRI appearances of type V bone contusion of knee, and explore the diagnostic value and clinical significance of MRI. Methods A retrospective review of 1672 consecutive MRI examinations of acutely injured knees was performed to screen patients with type V bone contusion. The MRI findings of them were analyzed by two musculoskeletal radiologists. Results The type V bone contusion of knee was found in 43 （2. 6% ）patients, involving both the inferomedial patella and the anterolateral femoral condyle. Bone contusion was defined as low signal on T1W], intermediate or slight hypointense signal on T2WI, and high signal intensity on fat saturation PDWI, which could be easily detected on axial, sagittal or coronal MR images. Other concomitant specific MR findings included fracture in 9 patients, chondral injury in 29 patients, and lateral patellar subluxation or complete dislocation in 27 patients. Injury of the medial retinaculum was diagnosed and classified in 37 cases, which could be observed best on axial images. Conclusions MRI was accurate in detecting the type V bone contusion and that is very helpful for diagnosis and treatment of transient lateral patellar dislocation, and should be used as a routine examination for knee trauma. Axial MR examination should be performed to evaluated the medial patellar retinaculum injury when type V bone contusion was found.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2010年第2期172-175,共4页
Chinese Journal of Radiology
关键词
膝关节
创伤和损伤
磁共振成像
Knee joint
Wounds and injuries
Magnetic resonance imaging
