{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,11]],"date-time":"2026-06-11T04:57:24Z","timestamp":1781153844590,"version":"3.54.1"},"reference-count":20,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T00:00:00Z","timestamp":1767916800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T00:00:00Z","timestamp":1767916800000},"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":["Magnetic Resonance Imaging"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Subamniotic or subchorionic hematoma (SAH\/SCH) is associated with diverse pregnancy outcomes. The clinical implications of accompanying oligohydramnios and hemorrhagic amniotic fluid on MRI remain unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To investigate the importance of oligohydramnios and hemorrhagic amniotic fluid on placental MRI for SAH\/SCH in risk stratification.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Type<\/jats:title>\n                    <jats:p>Retrospective.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Population<\/jats:title>\n                    <jats:p>Seventy\u2010one singleton pregnancies with SAH\/SCH identified on placental MRI performed during the second or third trimesters, from 2016 to 2023.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Field Strength\/Sequence<\/jats:title>\n                    <jats:p>1.5\u2009T, Fat\u2010saturated T1\u2010weighted gradient echo and half\u2010Fourier\u2010acquired single\u2010shot turbo spin echo sequences.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Assessment<\/jats:title>\n                    <jats:p>Cases were classified into three groups: Groups A (oligohydramnios and hemorrhagic amniotic fluid), B (either oligohydramnios or hemorrhagic amniotic fluid), and C (SAH or SCH only). Groups B and C were subclassified as B\u20101 (oligohydramnios), B\u20102 (hemorrhagic amniotic fluid), C\u20101 (detected hematoma on ultrasound before MRI), and C\u20102 (incidentally detected hematoma on MRI). Unfavorable obstetric outcome (abortion or birth before 34 gestational weeks) and neonatal outcome (duration of neonatal intensive care unit [NICU] stay) were compared.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Statistical Tests<\/jats:title>\n                    <jats:p>\n                      Fisher's exact test, Kruskal\u2013Wallis test, Mann\u2013Whitney U test, and Kaplan\u2013Meier analysis with Log\u2010rank test. Significance was determined at\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Unfavorable obstetric outcomes were significantly higher in Group A (11\/12, 91.7%) than groups B (6\/17, 35.3%) and C (9\/42, 21.4%). Significant differences were found among the five subclassified groups, most notably between B\u20101 and B\u20102. The median duration of NICU stay was 87, 30.5, 0, 25, and 8\u2009days in Groups A (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200912), B\u20101 (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20095), B\u20102 (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200912), C\u20101 (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200911), and C\u20102 (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200931), respectively. Group A showed the worst neonatal outcomes.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Data Conclusion<\/jats:title>\n                    <jats:p>MRI findings of oligohydramnios and\/or hemorrhagic amniotic fluid in pregnancies with SAH\/SCH are associated with adverse obstetric and neonatal outcomes, supporting risk stratification.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Evidence Level<\/jats:title>\n                    <jats:p>4.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Technical Efficacy<\/jats:title>\n                    <jats:p>Stage 5.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jmri.70227","type":"journal-article","created":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T06:56:52Z","timestamp":1768028212000},"page":"67-76","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Risk Stratification Based on Imaging Findings for Pregnancies With Subamniotic or Subchorionic Hematoma on Placental\n                    <scp>MRI<\/scp>"],"prefix":"10.1002","volume":"64","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-2462-4907","authenticated-orcid":false,"given":"Kumi","family":"Harada","sequence":"first","affiliation":[{"name":"Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8508-8221","authenticated-orcid":false,"given":"Yuki","family":"Himoto","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Radiology and Nuclear Medicine Kyoto University Hospital  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshitsugu","family":"Chigusa","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, Graduate School of Medicine Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seiichi","family":"Tomotaki","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Graduate School of Medicine Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2002-6836","authenticated-orcid":false,"given":"Yasuhisa","family":"Kurata","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Radiology and Nuclear Medicine Kyoto University Hospital  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsushi","family":"Yoshida","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuriko","family":"Muramatsu","sequence":"additional","affiliation":[{"name":"Department of Biomedical Statistics and Bioinformatics, Graduate School of Medicine Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Hidaka","sequence":"additional","affiliation":[{"name":"Department of Biomedical Statistics and Bioinformatics, Graduate School of Medicine Kyoto University  Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Morita","sequence":"additional","affiliation":[{"name":"Department of Biomedical Statistics and Bioinformatics, Graduate School of Medicine Kyoto 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