Abstract
Advanced 3-Tesla MRI can visualize normal anatomy and pathology more precisely and provides new insights. The chasing interpretation method is introduced to identify precise anatomy on high-quality MR images. The three-dimensional recognition of the shoulder MRI gives a new concept: the supra-/infraspinatus (SISP) muscle with two origins and one insertion. A paradigm shift from tear to avulsion in rotator cuff injury is required in the advanced MRI. Complete detachment of the SISP insertion causes muscular contraction: the pull-in phenomenon. The pull-in phenomenon causes overestimation of muscular atrophy on an oblique sagittal image at the glenoid level. The advanced MRI can detect inflammatory fibrosis of the joint capsule in the rotator interval fat tissue and/or axillary pouch as visible organic changes even in early or mild frozen shoulder. The information from oblique coronal, sagittal, and axial images is explained with an example of subacromial impingement.
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References
Sashi R (2012) Concept of the supra/infra-spinatus muscle (SISP) with two origins and one insertion. J Joint Surg 767:43–44
Sashi R (2011) Rotator cuff tear. In: Sashi R, Itoi E, Akita K (eds) MRI of the shoulder: all about reading skills, 2nd edn. Medical View, Tokyo, pp 58–87
Sashi R (2011) Pull-in phenomenon after complete tear of the supra/infara-spinatus tendon and evaluation of the muscular atrophy. In: Sashi R, Itoi E, Akita K (eds) MRI of the shoulder: all about reading skills, 2nd edn. Medical View, Tokyo, pp 66–67
Sashi R (2011) Axillary and rotator interval contractures. In: Sashi R, Itoi E, Akita K (eds) MRI of the shoulder: all about reading skills, 2nd edn. Medical View, Tokyo, pp 148–153
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© 2016 Springer Japan
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Sashi, R. (2016). Advanced MR Imaging of the Shoulder. In: Tamai, K., Itoi, E., Takagishi, K. (eds) Advances in Shoulder Surgery. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55988-7_4
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DOI: https://doi.org/10.1007/978-4-431-55988-7_4
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