{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T16:00:47Z","timestamp":1789920047975,"version":"4.0.1"},"reference-count":43,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T00:00:00Z","timestamp":1789862400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T00:00:00Z","timestamp":1789862400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["arthroscopyjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"abstract":"\n Purpose<\/jats:title>\n To quantify supraspinatus muscle volume (SPV) change after rotator cuff repair using deep\u2010learning\u2010based segmentation of full\u2010coverage magnetic resonance imaging and evaluate its associations with clinical, radiologic parameters, and retears.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n This retrospective study analyzed rotator cuff repair patients with a minimum 2\u2010year follow\u2010up, with preoperative and 1\u2010year postoperative magnetic resonance imaging both achieving full coverage of the supraspinatus to its medial origin. A deep\u2010learning model was used for automatic supraspinatus segmentation and SPV calculation. Intergroup analyses \u201cincrease\u201d versus \u201cdecrease,\u201d \u201chealed\u201d versus \u201cretear,\u201d and \u201cmale\u201d versus \u201cfemale\u201d were performed depending on SPV change, tendon healing, and sex, respectively. SPV change was further correlated with radiologic and clinical parameters.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n A total of 102 patients were analyzed. The mean follow\u2010up was 38.9\u2009\u00b1\u200913.4\u2009months (range, 24\u201077). In the SPV increased group (n\u2009=\u200970), a lower retear rate (14.3% vs 37.5%,\n P<\/jats:italic>\n \u2009=\u2009.008), a better postoperative Constant score (\n P<\/jats:italic>\n \u2009=\u2009.021), greater scapular plane abduction (\n P<\/jats:italic>\n \u2009=\u2009.011), and internal rotation (IR) strength (\n P<\/jats:italic>\n \u2009=\u2009.034) were shown compared with the SPV decreased (n\u2009=\u200932). Percentage increase in SPV was significantly correlated with the postoperative increase in the Constant score (r\u2009=\u20090.272,\n P<\/jats:italic>\n \u2009=\u2009.008), scapular plane abduction strength (r\u2009=\u20090.262,\n P<\/jats:italic>\n \u2009=\u2009.014), and IR strength (r\u2009=\u20090.304,\n P<\/jats:italic>\n \u2009=\u2009.004). Mean SPV increase was shown in the healed group (n\u2009=\u200980), contrary to the retear group (n\u2009=\u200922) (107.6\u2009\u00b1\u200914.7% vs 94.1\u2009\u00b1\u200919.8%,\n P<\/jats:italic>\n \u2009=\u2009.006), with significantly better clinical scores and strength, except in IR. Male patients showed significantly greater pre\u2010 and postoperative strength and SPV, while SPV change was similar between sexes. A greater postoperative SPV increase (per 10%) was independently associated with a higher postoperative Constant score (\n P<\/jats:italic>\n \u2009=\u2009.049), scapular plane abduction strength (\n P<\/jats:italic>\n \u2009=\u2009.018), IR strength (\n P<\/jats:italic>\n \u2009=\u2009.008), and a lower odds of retear (odds ratio, 0.49; 95% confidence interval, 0.30\u20100.80;\n P<\/jats:italic>\n \u2009=\u2009.004).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Postoperative volume increase in the supraspinatus muscle after rotator cuff repair was strongly associated with tendon healing and showed significant correlation with the increase in postoperative strength and the Constant score.<\/jats:p>\n <\/jats:sec>\n \n Level of Evidence<\/jats:title>\n Level III, retrospective comparative case series.<\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/arj.70531","type":"journal-article","created":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T15:09:56Z","timestamp":1789916996000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Postoperative Supraspinatus Muscle Volume Restoration Is Associated With Tendon Healing and Strength Recovery After Rotator Cuff Repair: Deep\u2010Learning\u2010Based Volumetric Analysis of the Entire Muscle With Clinical Correlation"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2996-9969","authenticated-orcid":false,"given":"Yong Tae","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery Hallym University Dongtan Sacred Heart Hospital Gyeonggi\u2010do Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hye Jin","family":"Yoo","sequence":"additional","affiliation":[{"name":"Department of Radiology Seoul National University Hospital Seoul Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sang Yun","family":"Oh","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Catholic Kwandong University International St. Mary's Hospital Incheon Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6848-350X","authenticated-orcid":false,"given":"Sae Hoon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Seoul National University Hospital Seoul Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,20]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1177\/0363546518810763","article-title":"The rotator cuff healing index: A new scoring system to predict rotator cuff healing after surgical repair","volume":"47","author":"Kwon J","year":"2019","journal-title":"Am J Sports Med."},{"key":"e_1_2_8_3_1","first-page":"301","article-title":"Fatty degeneration of the rotator cuff: Pathogenesis, clinical implications, and future treatment","volume":"1","author":"Bogdanov J","year":"2021","journal-title":"JSES Rev Rep Tech."},{"key":"e_1_2_8_4_1","doi-asserted-by":"crossref","first-page":"2477","DOI":"10.1016\/j.arthro.2016.04.032","article-title":"Changes of muscle atrophy according to the immediate postoperative time point in magnetic resonance imaging after arthroscopic rotator cuff repair","volume":"32","author":"Jo CH","year":"2016","journal-title":"Arthroscopy."},{"key":"e_1_2_8_5_1","doi-asserted-by":"crossref","first-page":"719","DOI":"10.1177\/0363546506297539","article-title":"Fatty infiltration and atrophy of the rotator cuff do not improve after rotator cuff repair and correlate with poor functional outcome","volume":"35","author":"Gladstone JN","year":"2007","journal-title":"Am J Sports Med."},{"key":"e_1_2_8_6_1","doi-asserted-by":"crossref","first-page":"967","DOI":"10.1016\/j.jse.2016.10.016","article-title":"Does successful rotator cuff repair improve muscle atrophy and fatty infiltration of the rotator cuff? 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