{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T22:56:47Z","timestamp":1777503407695,"version":"3.51.4"},"reference-count":37,"publisher":"SAGE Publications","issue":"8","license":[{"start":{"date-parts":[[2017,12,7]],"date-time":"2017-12-07T00:00:00Z","timestamp":1512604800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Acta Radiol"],"published-print":{"date-parts":[[2018,8]]},"abstract":"<jats:p>The shoulder is the most frequently dislocated joint in the body due to a larger range of motion and a small area of articulation between the humeral and glenoid surfaces. Traumatic shoulder dislocations, especially those associated with injury to the labroligamentous or bony stabilizers of the joint, lead to further reduction of articular surface contact with resultant glenohumeral instability and recurrent shoulder dislocations. Imaging plays an increasingly important role in the preoperative evaluation of patients with traumatic shoulder instability by evaluating glenohumeral bone loss (uni- or bipolar), assessing soft tissue injuries and identifying patients at risk of postoperative recurrence. Quantification of bone loss is key to differentiate engaging vs. non-engaging Hill\u2013Sachs lesions, while newer concepts of \u201con-track\u201d vs. \u201coff-track\u201d lesions are being discussed that can determine the required surgical approaches. In this article, we review the preoperative imaging approaches, traditional treatments, outline the bone loss measurement strategies and review these new tracking concepts with relevant case examples.<\/jats:p>","DOI":"10.1177\/0284185117745573","type":"journal-article","created":{"date-parts":[[2017,12,7]],"date-time":"2017-12-07T23:47:49Z","timestamp":1512690469000},"page":"966-972","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":14,"title":["New concepts of radiologic preoperative evaluation of anterior shoulder instability: on-track and off-track lesions"],"prefix":"10.1177","volume":"59","author":[{"given":"Aishwarya","family":"Gulati","sequence":"first","affiliation":[{"name":"Maulana Azad Medical College, New Delhi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Riham","family":"Dessouky","sequence":"additional","affiliation":[{"name":"Department of Radiology, UT Southwestern Medical 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