{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T16:23:30Z","timestamp":1790699010243,"version":"4.1.0"},"reference-count":58,"publisher":"BMJ","issue":"14","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Br J Sports Med"],"accepted":{"date-parts":[[2016,11,28]]},"published-print":{"date-parts":[[2017,7]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>The optimal timing of MRI following acute hamstring injury is not known and is mainly based on expert opinions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Aims<\/jats:title><jats:p>To describe the day-to-day changes in the extent of oedema and investigate the optimal timing for detection of fibre disruption on MRI following acute hamstring injuries.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study design<\/jats:title><jats:p>Prospective, descriptive study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We performed standardised MRI (1.5T) \u22641\u2005day after injury in male athletes with acute hamstring injury. If initial MRI revealed positive signs of injury (increased signal intensity on fluid sensitive sequences), consecutive MRIs were obtained daily throughout the subsequent week (ie, 7 times). The MRI parameters (day 1\u20137) were scored by a single radiologist using a standardised scoring form. The day-to-day changes in the extent of oedema (distance from tuber, craniocaudal length, mediolateral width and anteroposterior depth) and the presence and extent of fibre disruption (tear) were assessed with descriptive statistics and repeated measures using analysis of variance of log-transformed data. The overall main effect for time was reported with a significance level set at p&lt;0.05.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>13 out of 132 male athletes assessed for eligibility between January 2014 and December 2015 were included. 1 dropped out, while 12 (31\u2005years, range 20\u201349) completed the study; 11 had 7 MRI scans each and one had 5 MRI scans performed. There were no significant day-to-day changes for any of the extent of oedema measures (p values ranging from 0.12 to 0.81). Fibre disruption (tear), present in 5 of the athletes, was detectable from day 1, with small and insignificant day-to-day changes (p values ranging from 0.45 to 0.95).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>We observed insignificant day-to-day changes in the extent of oedema throughout the first week following acute hamstring injury. Fibre disruption (tear) was detectable from the first day after injury. These findings indicate that MRI can be performed on any day during the first week following an acute (hamstring) muscle injury.<\/jats:p><\/jats:sec>","DOI":"10.1136\/bjsports-2016-096881","type":"journal-article","created":{"date-parts":[[2016,12,29]],"date-time":"2016-12-29T02:50:24Z","timestamp":1482979824000},"page":"1087-1092","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":21,"title":["MRI appearance does not change in the first 7 days after acute hamstring injury\u2014a prospective study"],"prefix":"10.1136","volume":"51","clinical-trial-number":[{"clinical-trial-number":"nct02104258","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"Arnlaug","family":"Wangensteen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roald","family":"Bahr","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robbart","family":"Van Linschoten","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emad","family":"Almusa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rodney","family":"Whiteley","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erik","family":"Witvrouw","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Johannes L","family":"Tol","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2016,12,28]]},"reference":[{"key":"2024051411385524000_51.14.1087.1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsams.2012.07.001"},{"key":"2024051411385524000_51.14.1087.2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510395879"},{"key":"2024051411385524000_51.14.1087.3","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0838.2009.00995.x"},{"key":"2024051411385524000_51.14.1087.4","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2004.014571"},{"key":"2024051411385524000_51.14.1087.5","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2008.056283"},{"key":"2024051411385524000_51.14.1087.6","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2013-093087"},{"key":"2024051411385524000_51.14.1087.7","doi-asserted-by":"publisher","DOI":"10.1177\/0363546513476270"},{"key":"2024051411385524000_51.14.1087.8","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510394647"},{"key":"2024051411385524000_51.14.1087.9","doi-asserted-by":"publisher","DOI":"10.1177\/0363546505286022"},{"key":"2024051411385524000_51.14.1087.10","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2015-095559"},{"key":"2024051411385524000_51.14.1087.11","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2009.060582"},{"key":"2024051411385524000_51.14.1087.12","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2015-095359"},{"key":"2024051411385524000_51.14.1087.13","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2011-090317"},{"key":"2024051411385524000_51.14.1087.14","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2011-090155"},{"key":"2024051411385524000_51.14.1087.15","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2014.905695"},{"key":"2024051411385524000_51.14.1087.16","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2014-093737"},{"key":"2024051411385524000_51.14.1087.17","doi-asserted-by":"publisher","DOI":"10.1007\/s12178-015-9260-4"},{"key":"2024051411385524000_51.14.1087.18","doi-asserted-by":"publisher","DOI":"10.1259\/bjr\/84622172"},{"key":"2024051411385524000_51.14.1087.19","doi-asserted-by":"publisher","DOI":"10.1007\/s00330-005-0075-3"},{"key":"2024051411385524000_51.14.1087.20","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-012-2055-x"},{"key":"2024051411385524000_51.14.1087.21","doi-asserted-by":"publisher","DOI":"10.1177\/036354658701500102"},{"key":"2024051411385524000_51.14.1087.22","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2016-095974"},{"key":"2024051411385524000_51.14.1087.23","doi-asserted-by":"publisher","DOI":"10.1177\/036354659302100116"},{"key":"2024051411385524000_51.14.1087.24","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.172.3.2772190"},{"key":"2024051411385524000_51.14.1087.25","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1097\/00002142-199109000-00006","article-title":"Exertional muscle injuries: magnetic resonance imaging evaluation","volume":"3","author":"Fleckenstein","year":"1991","journal-title":"Top Magn Reson Imaging"},{"key":"2024051411385524000_51.14.1087.26","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.179.6.1791621"},{"key":"2024051411385524000_51.14.1087.27","doi-asserted-by":"publisher","DOI":"10.1016\/S1440-2440(04)80016-1"},{"key":"2024051411385524000_51.14.1087.28","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.183.4.1830975"},{"key":"2024051411385524000_51.14.1087.29","doi-asserted-by":"publisher","DOI":"10.1177\/0363546512463679"},{"key":"2024051411385524000_51.14.1087.30","doi-asserted-by":"publisher","DOI":"10.1177\/1941738111403107"},{"key":"2024051411385524000_51.14.1087.31","doi-asserted-by":"publisher","DOI":"10.1177\/0363546505283835"},{"key":"2024051411385524000_51.14.1087.32","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2014-093860"},{"key":"2024051411385524000_51.14.1087.33","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2015-094892"},{"key":"2024051411385524000_51.14.1087.34","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2015-094657"},{"key":"2024051411385524000_51.14.1087.35","doi-asserted-by":"publisher","DOI":"10.1177\/0363546507303563"},{"key":"2024051411385524000_51.14.1087.36","doi-asserted-by":"publisher","DOI":"10.1177\/0363546506294679"},{"key":"2024051411385524000_51.14.1087.37","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2013-092165"},{"key":"2024051411385524000_51.14.1087.38","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2013-093214"},{"key":"2024051411385524000_51.14.1087.39","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1007\/s40279-014-0243-1","article-title":"Magnetic resonance imaging in acute hamstring injury: can we provide a return to play prognosis?","volume":"45","author":"Reurink","year":"2015","journal-title":"Sports Med Auckl NZ"},{"key":"2024051411385524000_51.14.1087.40","doi-asserted-by":"crossref","first-page":"66","DOI":"10.3348\/kjr.2011.12.1.66","article-title":"Serial MR imaging of intramuscular hematoma: experimental study in a rat model with the pathologic correlation","volume":"12","author":"Lee","year":"2011","journal-title":"Korean J Radiol"},{"key":"2024051411385524000_51.14.1087.41","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2015-094892"},{"key":"2024051411385524000_51.14.1087.42","doi-asserted-by":"publisher","DOI":"10.1007\/s00330-001-1164-6"},{"key":"2024051411385524000_51.14.1087.43","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2013-092564"},{"key":"2024051411385524000_51.14.1087.44","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsams.2015.04.005"},{"key":"2024051411385524000_51.14.1087.45","doi-asserted-by":"crossref","first-page":"2115","DOI":"10.1007\/s00167-013-2744-0","article-title":"The hamstring muscle complex","volume":"23","author":"van der Made","year":"2015","journal-title":"Knee Surg Sports Traumatol Arthrosc Off J ESSKA"},{"key":"2024051411385524000_51.14.1087.46","doi-asserted-by":"crossref","first-page":"801","DOI":"10.1249\/00005768-199107000-00006","article-title":"Healing of skeletal muscle injury: an ultrastructural and immunohistochemical study","volume":"23","author":"Hurme","year":"1991","journal-title":"Med Sci Sports Exerc"},{"key":"2024051411385524000_51.14.1087.47","doi-asserted-by":"crossref","first-page":"822","DOI":"10.2106\/00004623-200205000-00022","article-title":"Muscle injuries and repair: current trends in research","volume":"84-A","author":"Huard","year":"2002","journal-title":"J Bone Joint Surg Am"},{"key":"2024051411385524000_51.14.1087.48","doi-asserted-by":"publisher","DOI":"10.1002\/bdrc.21005"},{"key":"2024051411385524000_51.14.1087.49","doi-asserted-by":"crossref","first-page":"337","DOI":"10.32098\/mltj.04.2013.16","article-title":"Regeneration of injured skeletal muscle after the injury","volume":"3","author":"J\u00e4rvinen","year":"2013","journal-title":"Muscles Ligaments Tendons J"},{"key":"2024051411385524000_51.14.1087.50","doi-asserted-by":"publisher","DOI":"10.1177\/0363546505274714"},{"key":"2024051411385524000_51.14.1087.51","first-page":"571","article-title":"Hamstring muscle complex: an imaging review","volume":"25","author":"Koulouris","year":"2005","journal-title":"Radiogr Rev Publ Radiol Soc N Am Inc"},{"key":"2024051411385524000_51.14.1087.52","doi-asserted-by":"publisher","DOI":"10.1249\/MSS.0b013e3182776eff"},{"key":"2024051411385524000_51.14.1087.53","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2013.4452"},{"key":"2024051411385524000_51.14.1087.54","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2013-092450"},{"key":"2024051411385524000_51.14.1087.55","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.14140702"},{"key":"2024051411385524000_51.14.1087.56","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2011.3586"},{"key":"2024051411385524000_51.14.1087.57","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-007-0549-x"},{"key":"2024051411385524000_51.14.1087.58","doi-asserted-by":"publisher","DOI":"10.1519\/JSC.0b013e31825c2f38"}],"container-title":["British Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bjsports-2016-096881","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,5,14]],"date-time":"2024-05-14T19:02:20Z","timestamp":1715713340000},"score":1,"resource":{"primary":{"URL":"https:\/\/bjsm.bmj.com\/lookup\/doi\/10.1136\/bjsports-2016-096881"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,12,28]]},"references-count":58,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2017,6,28]]},"published-print":{"date-parts":[[2017,7]]}},"alternative-id":["10.1136\/bjsports-2016-096881"],"URL":"https:\/\/doi.org\/10.1136\/bjsports-2016-096881","relation":{},"ISSN":["0306-3674","1473-0480"],"issn-type":[{"value":"0306-3674","type":"print"},{"value":"1473-0480","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,12,28]]}}}