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The method was evaluated in 15 healthy volunteers and one patient with liver cirrhosis on a 5\u2009T system, and further validated in 5 healthy volunteers on a 3\u2009T system. Ungated liver 4D flow reconstructed with AMOCO was compared with 2D flow and navigator\u2010gated 4D flow references. Image quality was assessed using gradient entropy, and flow measurements in the portal vein and its left and right branches were analyzed. Statistical group differences, correlations, and measurement consistency were evaluated. The feasibility of the AMOCO method applied across 5T and 3T scanning platforms was preliminarily validated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Ungated 4D flow MRI achieved clinically acceptable scan times (5:30\u2009min), with AMOCO providing image quality comparable to navigator\u2010gated acquisitions. For flow measurements, AMOCO results showed insignificant net flow differences and improved consistency with 2D flow (ICC: 0.96 for AMOCO vs. 0.90 for uncorrected reconstructions). The proposed method is feasible for 4D flow motion correction across scanning platforms.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>AMOCO effectively suppresses motion artifacts, improves small\u2010vessel visualization and accuracy of flow measurements while maintaining clinically acceptable scan times. Its potential for applications across different field strengths was preliminarily validated.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/mrm.70404","type":"journal-article","created":{"date-parts":[[2026,4,27]],"date-time":"2026-04-27T04:15:37Z","timestamp":1777263337000},"page":"1148-1161","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Adaptive Respiratory Motion Correction Framework for Ungated Hepatic\n                    <scp>4D<\/scp>\n                    Flow\n                    <scp>MRI<\/scp>"],"prefix":"10.1002","volume":"96","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-7879-2868","authenticated-orcid":false,"given":"Ruiyu","family":"Cao","sequence":"first","affiliation":[{"name":"Institute of Science and Technology for Brain\u2010Inspired Intelligence Fudan University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shaohang","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Science and Technology for Brain\u2010Inspired Intelligence Fudan University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2050-3479","authenticated-orcid":false,"given":"Aiqi","family":"Sun","sequence":"additional","affiliation":[{"name":"Department of Radiology Stanford University  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-4145-1553","authenticated-orcid":false,"given":"Bingyi","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Science and Technology for Brain\u2010Inspired Intelligence Fudan University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuhui","family":"Nie","sequence":"additional","affiliation":[{"name":"Institute of Science and Technology for Brain\u2010Inspired Intelligence Fudan University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1591-7674","authenticated-orcid":false,"given":"Hongwei","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Science and Technology for Brain\u2010Inspired Intelligence Fudan University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junpu","family":"Hu","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center  Dallas Texas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ne","family":"Yang","sequence":"additional","affiliation":[{"name":"United Imaging Research Institute of Intelligent Imaging  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiayu","family":"Zhu","sequence":"additional","affiliation":[{"name":"Central Research Institute, United Imaging Healthcare Group  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying\u2010Hua","family":"Chu","sequence":"additional","affiliation":[{"name":"MR Research Collaboration Team, Siemens Healthineers Ltd  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ning","family":"Jin","sequence":"additional","affiliation":[{"name":"Siemens Medical Solutions USA, Inc.  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