肩腱板断裂およびインピンジメント症候群におけるMRIの診断的有用性

抄録

Eighteen patients with known tears of the rotator cuff and three patients with suspected impingement syndrome of the rotator cuff which were diagnosed by arthrography underwent MR imaging. The results of the imaging studies were then compared with arthographic and operative findings.
MR imaging was performed with a 1.5T superconductive system with shoulder surface coil. T1-weighted images and MPGR T2*-weighted images were performed in the coronal oblique plane and the sagittal oblique plane.
Out of twenty-one patients, the operative findings confirmed complete tear in fifteen patients, partial tear in three patients and tendinitis in three patients. Arthrography showed complete tear in fifteen patients, partial tear in two patients and no abnormality in four patients. MR imaging showed complete tear in thirteen patients, partial tear in three patients and tendinitis in five patients.
In the thirteen complete tears diagnosed by MR imaging, no false results were found. But of the three cases diagnosed as having a partial tear, one had a key hole tear. Out of five tendinitis cases, one had a pin hole tear and another had a small partial tear.
We conclude that MR imaging is accurate for the diagnosis of impingement syndrome and rotator cuff tear except for very small defects such as pin hole tears.