{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T19:13:47Z","timestamp":1790363627153,"version":"4.1.0"},"reference-count":51,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2017,1,3]],"date-time":"2017-01-03T00:00:00Z","timestamp":1483401600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J cachexia sarcopenia muscle"],"published-print":{"date-parts":[[2017,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>The strong link between reduced muscle mass and morbidity and mortality highlights the urgent need for simple techniques that can monitor change in skeletal muscle cross\u2010sectional area (CSA). Our objective was to examine the validity of panoramic ultrasound to detect change in quadriceps and gastrocnemius size in comparison with magnetic resonance imaging (MRI) in subjects randomized to 70\u2009days of bed rest (BR) with or without exercise.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Panoramic ultrasound and MRI images of the quadriceps and gastrocnemius muscles were acquired on the right leg of 27 subjects (26 male, 1 female; age: 34.6\u2009\u00b1\u20097.8\u2009years; body mass: 77.5\u2009\u00b1\u200910.0\u2009kg; body mass index: 24.2\u2009\u00b1\u20092.8\u2009kg\/m<jats:sup>2<\/jats:sup>; height: 179.1\u2009\u00b1\u20096.9\u2009cm) before (BR\u20106), during (BR3, 7, 11, 15, 22, 29, 36, 53, 69), and after (BR+3, +6, +10) BR. Validity of panoramic ultrasound to detect change in muscle CSA was assessed by Bland\u2013Altman plots, Lin's concordance correlation coefficient (CCC), sensitivity, specificity, positive predictive value, and negative predictive value.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Six hundred ninety\u2010eight panoramic ultrasound CSA and 698 MRI CSA measurements were assessed. Concordance between ultrasound and MRI was excellent in the quadriceps (CCC: 0.78; <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.0001), whereas there was poor concordance in the gastrocnemius (CCC: 0.37; <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.0006). Compared with MRI, panoramic ultrasound demonstrated high accuracy in detecting quadriceps atrophy and hypertrophy (sensitivity: 73.7%; specificity: 74.2%) and gastrocnemius atrophy (sensitivity: 83.1%) and low accuracy in detecting gastrocnemius hypertrophy (specificity: 33.0%).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Panoramic ultrasound imaging is a valid tool for monitoring quadriceps muscle atrophy and hypertrophy and for detecting gastrocnemius atrophy.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jcsm.12172","type":"journal-article","created":{"date-parts":[[2017,1,4]],"date-time":"2017-01-04T03:52:41Z","timestamp":1483501961000},"page":"475-481","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":80,"title":["Panoramic ultrasound: a novel and valid tool for monitoring change in muscle mass"],"prefix":"10.1002","volume":"8","author":[{"given":"Jessica 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