Greco A, McNamara M T, Escher R M, Trifilio G, Parienti J
Department of Magnetic Resonance Imaging, Centre Hospitalier Princesse Grace, Principality of Monaco.
J Comput Assist Tomogr. 1991 Nov-Dec;15(6):994-9. doi: 10.1097/00004728-199111000-00017.
Seventy patients with clinically diagnosed athletic muscle injuries of varying severity were studied with MR imaging at 1.5 T. Twenty underwent follow-up MR studies. In all cases, SE T1-weighted and double-echo T2-weighted pulse sequences were used. These were supplemented by short T1 inversion recovery (STIR) sequence in 36 cases. Muscle injuries were more readily seen with STIR images than with SE T2-weighted images. In both initial assessment and follow-up of tears, the use of the STIR technique allowed the greatest lesion/muscle contrast. Short TR, short TE SE images provided anatomic detail and were an adjunct to T2-dependent SE images in the evaluation of organized hematomas (11 cases). Follow-up MR studies in 20 patients at variable time intervals allowed demonstration of regression of the tear in 11 cases, fibrous scar formation in 5 cases, and recurrence of the tear in 4 cases. Evolution of hematomas into scar and into cyst was demonstrated in three and two cases, respectively. Owing to the additive effect of T1 and T2 mechanisms, the STIR sequence is well suited for initial evaluation and can replace T2-weighted images in the follow-up of muscle trauma.
对70例临床诊断为不同严重程度运动性肌肉损伤的患者进行了1.5T磁共振成像研究。其中20例进行了随访磁共振检查。所有病例均采用自旋回波（SE）T1加权和双回波T2加权脉冲序列。36例补充了短T1反转恢复（STIR）序列。与SE T2加权图像相比，STIR图像更容易显示肌肉损伤。在撕裂伤的初始评估和随访中，使用STIR技术能获得最大的病变/肌肉对比度。短TR、短TE的SE图像提供了解剖细节，在评估机化血肿（11例）时是依赖T2的SE图像的辅助手段。对20例患者在不同时间间隔进行的随访磁共振研究显示，11例撕裂伤有所消退，5例形成纤维瘢痕，4例撕裂伤复发。分别有3例和2例显示血肿演变为瘢痕和囊肿。由于T1和T2机制的叠加效应，STIR序列非常适合初始评估，并且在肌肉创伤的随访中可以替代T2加权图像。
