膝关节隐性骨折的MRI价值  

Value of MR Imaging in Detecting Occult Fractures of Knee

作　　者：田荣华[1] 马芬[1] 丁立军 章宏[1] 程平章[1] 孙世介[1] 

机构地区：[1]孝感市中心医院放射科,湖北432000 [2]孝感市孝南区三汊镇卫生院,湖北432126

出　　处：《放射学实践》2006年第8期817-819,共3页Radiologic Practice

摘　　要：目的:探讨膝部隐性骨折的MR表现及其价值。方法:42例急性外伤患者均行X线平片及MRI检查,6例同时行CT检查。MRI检查序列包括T1WI、脂肪抑制T1WI,T2WI与T2WI。结果:本组42例X线平片均未见骨折征象,6例CT亦未见骨折征象,部分见周围软组织肿胀。42例共55处膝部隐性骨折,31例T1WI可见不规则条状、紊乱低信号,21例在T2WI上对应于T1WI上低信号区仍表现为相应形状的低信号,10例表现为高信号,其周可见水肿信号,以T1脂肪抑制序列和T2WI序列显示明显。25例合并韧带或半月板损伤。结论:MRI能敏感显示膝部隐性骨折的水肿、骨折线和伴发表现,对于疑为膝部隐性骨折的病例应列为首选检查。Objective：To study MR imaging features and its value in detecting occult fracture of the knee. Methods：42 cases with acute trauma were performed radiography and MR imaging examination, 6 cases also underwent CT examinations. The MR sequences included SE T1WI, FSE T2 WI, FSE T2＊WI and T1 weighted fat saturated sequence. Results： All 42 cases had normal radiographic results,6 cases with CT scanning showed no fracture signs, but soft tissue swelling was displayed. 55 occult fractures in 42 patients were found by MRI,the upper part of tibia was most commonly affected. Irregular low signal in 31 cases on T1WI was seen,in the same place,irregular low signal in 21 cases and irregular high signal in 10 cases on T2 WI and with swelling changes around them were found. The signal features on T1 weighted fat saturated sequence and T2＊WI were more remarkable. Ligament injury and menisci tears were demonstrated by MRI in 25 cases. Conelusion：MRI is sensitive in detecting occult fractures of knee and associated injuries. For patients suspected for knee fracture, MRI should be the modality of first choice.

关 键 词：骨折 膝关节 磁共振成像 诊断 

分 类 号：R445.2[医药卫生—影像医学与核医学] R683[医药卫生—诊断学]