Kumagai H, Ito H, Kubo A
Department of Radiology, Tokyo Metropolitan Otsuka Hospital.
Nihon Igaku Hoshasen Gakkai Zasshi. 1995 Feb;55(3):133-7.
This study was performed to determine the merits of T2*-weighted images in diagnosing rotator cuff tear, compared with T2-weighted images. T2-and T2*-weighted images were obtained in 10 asymptomatic volunteers and 94 patients with symptoms referable to the rotator cuff. The increased signal with full thickness of the rotator cuff was not shown on either T2- or T2*-weighted images in the volunteers. These findings on T2-weighted images and on T2*-weighted images were observed in 33 and 58 of 94 patients with symptoms, respectively. Every patient who showed these abnormal findings on T2-weighted images had the abnormal findings on T2*-weighted images. These findings on T2*-weighted images were wider than those on T2-weighted images in 20 of 33 patients. Surgical findings were available in 21 of 94 patients. Rotator cuff tears were surgically confirmed in 20 patients whose MR images showed increased signal lesions on both T2- and T2*-weighted images. On the other hand, one patient who did not have rotator cuff tear showed increased signal lesion with full thickness on T2*-weighted images, but not on T2-weighted images. We think increased signal lesions on T2-weighted images may strongly suggest rotator cuff tear, whereas those on T2*-weighted images are not specific.
本研究旨在确定与T2加权图像相比，T2加权图像在诊断肩袖撕裂方面的优势。对10名无症状志愿者和94名有肩袖相关症状的患者进行了T2加权和T2加权成像。志愿者的肩袖全层在T2加权图像和T2加权图像上均未显示信号增强。94名有症状的患者中，分别有33名和58名在T2加权图像和T2加权图像上观察到这些表现。在T2加权图像上出现这些异常表现的每位患者，在T2加权图像上也有异常表现。在33名患者中的20名中，T2加权图像上的这些表现范围比T2加权图像上的更广泛。94名患者中有21名有手术结果。20名患者的肩袖撕裂经手术证实，其磁共振图像在T2加权图像和T2加权图像上均显示信号增强病变。另一方面，1名没有肩袖撕裂的患者在T2加权图像上显示全层信号增强病变，但在T2加权图像上未显示。我们认为，T2加权图像上的信号增强病变可能强烈提示肩袖撕裂，而T2*加权图像上的信号增强病变则不具有特异性。
