{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T17:20:47Z","timestamp":1780680047871,"version":"3.54.1"},"reference-count":34,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,7,31]],"date-time":"2023-07-31T00:00:00Z","timestamp":1690761600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>The pain pathomechanism of chronic low back pain (LBP) is complex and the available diagnostic methods are insufficient. Patients present morphological changes in volume and cross-sectional area (CSA) of lumbosacral region. The main objective of this study was to assess if CSA measurements of pelvic muscle will indicate muscle atrophy between asymptomatic and symptomatic sides in chronic LBP patients, as well as between right and left sides in healthy volunteers. In addition, inter-rater reliability for CSA measurements was examined. The study involved 71 chronic LBP patients and 29 healthy volunteers. The CSA of gluteus maximus, medius, minimus and piriformis were measured using the MRI manual segmentation method. Muscle atrophy was confirmed in gluteus maximus, gluteus minimus and piriformis muscle for over 50% of chronic LBP patients (p &lt; 0.05). Gluteus medius showed atrophy in patients with left side pain occurrence (p &lt; 0.001). Muscle atrophy occurred on the symptomatic side for all inspected muscles, except gluteus maximus in rater one assessment. The reliability of CSA measurements between raters calculated using CCC and ICC presented great inter-rater reproducibility for each muscle both in patients and healthy volunteers (p &lt; 0.95). Therefore, there is the possibility of using CSA assessment in the diagnosis of patients with symptoms of chronic LBP.<\/jats:p>","DOI":"10.3390\/jimaging9080155","type":"journal-article","created":{"date-parts":[[2023,7,31]],"date-time":"2023-07-31T02:13:32Z","timestamp":1690769612000},"page":"155","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The Cross-Sectional Area Assessment of Pelvic Muscles Using the MRI Manual Segmentation among Patients with Low Back Pain and Healthy Subjects"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5318-9343","authenticated-orcid":false,"given":"Wiktoria","family":"Fr\u0105cz","sequence":"first","affiliation":[{"name":"Faculty of Biomedical Sciences, Medical University of Lodz, Al. Kosciuszki 4, 90-419 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8710-1493","authenticated-orcid":false,"given":"Jakub","family":"Matuska","sequence":"additional","affiliation":[{"name":"Department of Physiotherapy, Poznan University of Medical Sciences, ul. 28 czerwca 1956r. nr 135\/147, 61-545 Poznan, Poland"},{"name":"Doctoral School, Poznan University of Medical Sciences, Bukowska 70, 60-812 Pozna\u0144, Poland"},{"name":"Doctoral School, Rovira I Virgili University, Carrer St. Lloren\u00e7 No. 21, 43201 Reus, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5293-8362","authenticated-orcid":false,"given":"Jaros\u0142aw","family":"Szyszka","sequence":"additional","affiliation":[{"name":"Opole Rehabilitation Centre in Korfant\u00f3w, Wyzwolenia 11, 48-317 Korfant\u00f3w, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6436-2487","authenticated-orcid":false,"given":"Pawe\u0142","family":"Dobrakowski","sequence":"additional","affiliation":[{"name":"Psychology Institute, Humanitas University in Sosnowiec, 41-200 Sosnowiec, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5105-1340","authenticated-orcid":false,"given":"Wiktoria","family":"Szopka","sequence":"additional","affiliation":[{"name":"Faculty of Veterinary Medicine and Animal Science, Poznan University of Life Sciences, 60-637 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9448-6720","authenticated-orcid":false,"given":"El\u017cbieta","family":"Skorupska","sequence":"additional","affiliation":[{"name":"Department of Physiotherapy, Poznan University of Medical Sciences, ul. 28 czerwca 1956r. nr 135\/147, 61-545 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1016\/j.math.2007.10.003","article-title":"Classification of Low Back-Related Leg Pain-A Proposed Patho-Mechanism-Based Approach","volume":"14","author":"Hall","year":"2009","journal-title":"Man. 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