{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T14:26:46Z","timestamp":1740148006658,"version":"3.37.3"},"reference-count":25,"publisher":"Georg Thieme Verlag KG","issue":"01","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Vet Comp Orthop Traumatol"],"published-print":{"date-parts":[[2024,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>\n          Objective\u2003Canine hip dysplasia is a common orthopaedic disease in dogs. The Norberg angle value is a measure of hip joint laxity. The aim of this study was to quantify the degree of rotation necessary to consider the radiograph as inadequately positioned and to determine the influence of rotation on the Norberg angle.<\/jats:p><jats:p>\n          Study Design\u2003Three sets of radiographs with different positioning and projections were acquired using 10 canine cadavers. Rotation of the pelvis was simulated by rotating the X-ray tube without changing the position of the patient.<\/jats:p><jats:p>\n          Results\u2003In dorsoventral projections, the Norberg angle value is increased by 3.2 to 5.8%. Due to rotation along the long axis, the Norberg angle increases on one side and decreases on the contralateral side by approximately the same value. Rotation of greater than 2\u2009degrees in a lateral direction is visually perceived by the observer as tilted. Rotation of the projection in the caudoventral to craniodorsal direction causes mild increase of the Norberg angle (\u22641%), while rotation of the projection in a cranioventral to caudodorsal direction causes moderate (\u22642%) decrease of the Norberg angle. Rotation of less than \u201310\u2009degrees (caudoventral to craniodorsal) or greater than 10\u2009degrees (cranioventral to caudodorsal) is visually perceived as tilted.<\/jats:p><jats:p>\n          Conclusion\u2003Tilted images that are subjectively perceived evaluable have only little effect on the Norberg angle and are therefore probably acceptable. Dorsoventral projections can be recognized based on the proximal position of the patella and should be excluded from evaluation, as the Norberg angle value can be falsely increased.<\/jats:p>","DOI":"10.1055\/s-0043-1772696","type":"journal-article","created":{"date-parts":[[2023,8,25]],"date-time":"2023-08-25T23:13:51Z","timestamp":1693005231000},"page":"030-036","source":"Crossref","is-referenced-by-count":0,"title":["Influence of Femoral Position and Pelvic Projection on Norberg Angle Measurements"],"prefix":"10.1055","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6401-4853","authenticated-orcid":false,"given":"Julius","family":"Klever","sequence":"additional","affiliation":[{"name":"Clinic of Small Animal Surgery and Reproduction, Centre of Veterinary Clinical Medicine, LMU Munich, Germany"},{"name":"Queen Mother Hospital for Animals, The Royal Veterinary College, University of London, London, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andreas","family":"Br\u00fchschwein","sequence":"additional","affiliation":[{"name":"Clinic of Small Animal Surgery and Reproduction, Centre of Veterinary Clinical Medicine, LMU Munich, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sarah","family":"Hauser","sequence":"additional","affiliation":[{"name":"Clinic of Small Animal Surgery and Reproduction, Centre of Veterinary Clinical Medicine, LMU Munich, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne-Sophie","family":"Hoffmann","sequence":"additional","affiliation":[{"name":"Clinic of Small Animal Surgery and Reproduction, Centre of Veterinary Clinical Medicine, LMU Munich, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrea","family":"Meyer-Lindenberg","sequence":"additional","affiliation":[{"name":"Clinic of Small Animal Surgery and Reproduction, Centre of Veterinary Clinical Medicine, LMU Munich, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2023,8,25]]},"reference":[{"key":"ref1","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1055\/s-0038-1633097","article-title":"Incidence of canine appendicular musculoskeletal disorders in 16 veterinary teaching hospitals from 1980 through 1989","volume":"7","author":"J A Johnson","year":"1994","journal-title":"Vet Comp Orthop Traumatol"},{"issue":"02","key":"ref2","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1016\/S0167-5877(99)00059-8","article-title":"Controlling canine hip dysplasia in Finland","volume":"42","author":"M Lepp\u00e4nen","year":"1999","journal-title":"Prev Vet Med"},{"issue":"08","key":"ref3","doi-asserted-by":"crossref","first-page":"1880","DOI":"10.2527\/jas.2007-0166","article-title":"Comparison of estimates of hip dysplasia genetic parameters in Estrela Mountain Dog using linear and threshold models","volume":"85","author":"A M Silvestre","year":"2007","journal-title":"J Anim Sci"},{"issue":"03","key":"ref4","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1136\/vr.101152","article-title":"Canine hip dysplasia in Irish water spaniels: two decades of gradual improvement","volume":"173","author":"B Freeman","year":"2013","journal-title":"Vet Rec"},{"key":"ref5","first-page":"135","article-title":"Scoring radiographs for canine hip dysplasia: the big three organisations in the world","volume":"17","author":"M Fl\u00fcckiger","year":"2007","journal-title":"Eur J Companion Anim Pract"},{"volume-title":"Zum Problem der \u201cLockeren H\u00fcfte\u201d beim Hund. 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