{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T14:09:09Z","timestamp":1790690949460,"version":"4.1.0"},"reference-count":34,"publisher":"ASME International","issue":"11","license":[{"start":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:00Z","timestamp":1790640000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.asme.org\/publications-submissions\/publishing-information\/legal-policies"}],"funder":[{"DOI":"10.13039\/100006108","name":"National Center for Advancing Translational Sciences","doi-asserted-by":"publisher","award":["UL1-TR001857"],"award-info":[{"award-number":["UL1-TR001857"]}],"id":[{"id":"10.13039\/100006108","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["asmedigitalcollection.asme.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Despite highly constrained motion, the sacroiliac joint (SIJ) is implicated in 15\u201330% of clinical low back pain syndromes. SIJ motion has been estimated in vivo by comparing two or more noncontiguous static positions. However, no literature exists to characterize dynamic in vivo SIJ kinematics during physiologic activity. This study aimed to quantify dynamic multiplanar SIJ motion in healthy individuals during gait using dynamic biplane radiography. Young, healthy participants performed treadmill walking while synchronized biplane radiographs were collected at 50 images\/sec for three 1\u2009s trials per side. CT scans of the pelvis and sacrum were used to create 3D bone models via segmentation. Digitally reconstructed radiographs were created from the 3D bone models and matched to the biplane radiographs using a volumetric tracking technique to determine six-degree-of-freedom kinematics for the SIJ through the stance phase of gait. Twenty-three left- and nineteen right-sided trials in ten individuals were analyzed. The average SIJ range of motion was 2.0\u2009mm, 2.6\u2009mm, and 1.3\u2009mm in anterior-posterior, superior-inferior, and medial-lateral translation, respectively, and 2.0\u2009deg, 2.0\u2009deg, and 1.5\u2009deg in flexion\/extension, internal\/external, and ab\/adduction rotation, respectively. Kinematics were highly repeatable within an SIJ; the within-subject intertrial variability was on average less than 1.3\u2009mm in translation and 0.7\u2009deg in rotation. These healthy dynamic SIJ kinematics can be compared to pathologic SIJ kinematics in future studies to identify abnormalities and guide treatment strategies.<\/jats:p>","DOI":"10.1115\/1.4072708","type":"journal-article","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T10:33:51Z","timestamp":1789641231000},"update-policy":"https:\/\/doi.org\/10.1115\/crossmarkpolicy-asme","source":"Crossref","is-referenced-by-count":0,"title":["Characterizing Healthy Sacroiliac Joint Kinematics During Gait Using Biplane Radiography"],"prefix":"10.1115","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6107-7683","authenticated-orcid":false,"given":"M. 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