{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T09:01:56Z","timestamp":1784797316486,"version":"3.55.0"},"reference-count":27,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2014,4,15]],"date-time":"2014-04-15T00:00:00Z","timestamp":1397520000000},"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":["Am J Sports Med"],"published-print":{"date-parts":[[2014,6]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>In the diagnosis and surgical treatment of cam-type femoroacetabular impingement (FAI), 3-dimensional (3D) imaging is the gold standard for detecting femoral head-neck junction malformations preoperatively. Intraoperative fluoroscopy is used by many surgeons to evaluate and verify adequate correction of the deformity.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>(1) To compare radial reformatted computed tomography (CT) scans with 6 defined intraoperative fluoroscopic views before surgical correction to determine whether fluoroscopy could adequately depict cam deformity, and (2) to define the influence of femoral version on the clock-face location of the maximum cam deformity on these views.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort study (diagnosis); Level of evidence, 2.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>A consecutive series of 50 hips (48 patients) that underwent arthroscopic treatment for symptomatic FAI by a single surgeon were analyzed. Each patient underwent a CT scan and 6 consistent intraoperative fluoroscopy views: 3 views in hip extension and 3 views in hip flexion of 50\u00b0. The alpha angles of each of the fluoroscopic images were compared with the radial reformatted CT using a 3D software program. Femoral version was also defined on CT studies. Statistical analysis was performed using the Student t test, with P &lt; .05 defined as significant.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Fifty-two percent of patients were male, average age 28 years (range, 15-56 years). The maximum mean alpha angle on fluoroscopy was 65\u00b0 (range, 37\u00b0-93\u00b0) and was located on the anteroposterior (AP) 30\u00b0 external rotation (ER) fluoroscopy view. In comparison, the mean CT-derived maximum alpha angle was 67\u00b0 and was located at 1:15 ( P = .57). The mean clock-face positions of each of the fluoroscopy views (standardized to the right hip) were AP 30\u00b0 internal rotation, 11:45; AP 0\u00b0 (neutral) rotation, 12:30; AP 30\u00b0 ER, 1:00; flexion\/0\u00b0 (neutral) rotation, 1:45; flexion\/40\u00b0 ER, 2:15; and flexion\/60\u00b0 ER, 2:45. Increased femoral anteversion (&gt;20\u00b0) was associated with a significant change in the location of the maximum alpha angle (1:45 vs 1:15; P = .002).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>The described 6 fluoroscopic views are very helpful in localization and visualization of the typical cam deformity from 11:45 to 2:45 and can be used to reliably confirm a complete intraoperative resection of cam-type deformity in most patients. These views correlate with preoperative 3D imaging and may be of even greater importance in the absence of preoperative 3D imaging.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0363546514529515","type":"journal-article","created":{"date-parts":[[2014,4,16]],"date-time":"2014-04-16T02:56:15Z","timestamp":1397616975000},"page":"1370-1376","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":97,"title":["Intraoperative Fluoroscopic Imaging to Treat Cam Deformities"],"prefix":"10.1177","volume":"42","author":[{"given":"James R.","family":"Ross","sequence":"first","affiliation":[{"name":"Sports Medicine and Shoulder Service, University of Michigan, Ann Arbor, Michigan, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asheesh","family":"Bedi","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Service, University of Michigan, Ann Arbor, Michigan, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rebecca M.","family":"Stone","sequence":"additional","affiliation":[{"name":"Minnesota Orthopedic Sports Medicine Institute at Twin Cities Orthopedics, Edina, Minnesota, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth","family":"Sibilsky Enselman","sequence":"additional","affiliation":[{"name":"Sports Medicine and Shoulder Service, University of Michigan, Ann Arbor, Michigan, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Leunig","sequence":"additional","affiliation":[{"name":"Schulthess Klinik, Bern, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bryan T.","family":"Kelly","sequence":"additional","affiliation":[{"name":"Hospital for Special Surgery, New York, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher M.","family":"Larson","sequence":"additional","affiliation":[{"name":"Minnesota Orthopedic Sports Medicine Institute at Twin Cities Orthopedics, Edina, Minnesota, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2014,4,15]]},"reference":[{"key":"bibr1-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-010-1624-x"},{"key":"bibr2-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.87B7.15203"},{"key":"bibr3-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200401000-00012"},{"key":"bibr4-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1177\/0363546511414635"},{"key":"bibr5-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-013-3015-6"},{"key":"bibr6-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-012-1557-y"},{"key":"bibr7-0363546514529515","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-008-0659-8"},{"key":"bibr8-0363546514529515","first-page":"52","volume":"31","author":"Carlisle JC","year":"2011","journal-title":"Iowa Orthop 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