健常者の肩関節MRI所見 : T2^*を中心とした判定

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[Purpose] The purpose of this study was to evaluated the findings of MR imaging (MRI) of asymptomatic shoulder.[Materials and methods] MR images of 60 shoulders of 60 healthy subjects (6 males and 6 females in every decade between twenty and sixty) were used as materials. MR imaging was taken with SIEMENS 0.2T open MRI using a shoulder joint surface coil. Oblique coronal plane and axial plane images by T1-Weighted spin echo images (TR/TE:920/26) and T2*-gradient echo images (TR/TE/flip angle:742/17/60) were analyzed.[Result] High signal intensities of the supraspinatus tendon that looked like rotator cuff tear on the oblique coronal plane by T2*-images were found in 30 shoulders. In each decade, these findings were found in 2 shoulders in their twenties, 5 shoulders in their thirties, 5 shoulders in their forties, 8 shoulders in their fifties and 9 shoulders in their sixties. There was a significant difference between the appearance of this finding and aging (P<0.05). A high signal intensity area was located in 8 Bursal sides, 5 intratendinous, 5 articular sides and 11 full thicknesses. Cystic changes in the posterior greater tuberosity were noted in 25 shoulders, in 17 males (the mean size of the cystic change was 4.2±2.2mm) and in 8 females (the mean size of the cystic change was 2.3±0.7mm). There was a significant difference between the appearance of cystic change and the distinction of sex (P<0.05).[Conclusions] It is recognized that MR imagings show high signal intensities of the supraspinatus tendon that seem to be rotator cuff tear in some cases. We presumed this result is related to the degeneration of the rotator cuff, little effusion of the subacromial bursa and magic angle phenomenon. A cystic change in the posterior part of the greater tuberosity was observed more frequently in males.
日本肩関節学会の論文
2002-01-01

健常者の肩関節MRI所見 : T2^*を中心とした判定

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