{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T14:11:31Z","timestamp":1790172691734,"version":"4.1.0"},"reference-count":22,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,4,19]],"date-time":"2026-04-19T00:00:00Z","timestamp":1776556800000},"content-version":"vor","delay-in-days":18,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T00:00:00Z","timestamp":1775001600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["DEN Open"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>Patency capsule (PC) testing is widely used to assess small\u2010bowel patency before small\u2010bowel capsule endoscopy (SBCE). Although abdominal computed tomography (CT) reliably identifies PC location, routine use is limited by radiation exposure and cost. Abdominal ultrasonography (AUS) is a noninvasive, radiation\u2010free alternative; however, its diagnostic accuracy for PC localization remains unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a prospective, exploratory, single\u2010center study in patients in whom PC excretion could not be confirmed within the predefined observation period. All patients underwent AUS followed by CT on the same day. The primary endpoint was the sensitivity of AUS for detecting small\u2010bowel PC retention using CT as the reference standard. Secondary endpoints included the PC visualization rate, diagnostic accuracy for small bowel versus colon classification, six\u2010segment agreement between AUS and CT, and SBCE retention after AUS\u2010based assessment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Thirty\u2010four patients were included. AUS visualized the PC in 28 patients (82.4%). All six patients with small\u2010bowel retention on CT were correctly identified as \u201csmall bowel\u201d by AUS (sensitivity 100%; 95% confidence interval [CI], 61.0\u2013100). Among 28 patients with colonic PC on CT, AUS classified 22 as \u201ccolon,\u201d yielding a sensitivity of 78.6% (95% CI, 60.5\u201389.9). Six\u2010segment agreement between AUS and CT was 82.4% overall and 100% among visualized cases. No SBCE retention occurred after AUS\u2010based colonic classification.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>AUS accurately detected small\u2010bowel PC retention and showed good agreement with CT when visualization was achieved. Although non\u2010visualized findings require cautious interpretation, AUS may serve as a useful first\u2010line imaging modality for evaluating PC location prior to SBCE.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trial Registration<\/jats:title>\n                    <jats:p>N\/A.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/deo2.70331","type":"journal-article","created":{"date-parts":[[2026,4,20]],"date-time":"2026-04-20T04:42:29Z","timestamp":1776660149000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Prospective Study Comparing the Diagnostic Ability of Abdominal Ultrasonography with Computed Tomography in Cases Suspected of Retaining the Patency Capsule"],"prefix":"10.1002","volume":"6","author":[{"given":"Tomoharu","family":"Matsuura","sequence":"first","affiliation":[{"name":"Department of Laboratory Medicine Hamamatsu 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