{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T23:36:26Z","timestamp":1768520186446,"version":"3.49.0"},"reference-count":82,"publisher":"Elsevier BV","issue":"5","license":[{"start":{"date-parts":[[2018,5,1]],"date-time":"2018-05-01T00:00:00Z","timestamp":1525132800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"}],"content-domain":{"domain":["clinicalkey.jp","clinicalkey.com","clinicalkey.es","jacr.org","clinicalkey.fr","clinicalkey.com.au","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Journal of the American College of Radiology"],"published-print":{"date-parts":[[2018,5]]},"DOI":"10.1016\/j.jacr.2018.03.018","type":"journal-article","created":{"date-parts":[[2018,4,30]],"date-time":"2018-04-30T10:19:29Z","timestamp":1525083569000},"page":"S69-S77","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":21,"special_numbering":"S","title":["ACR Appropriateness Criteria \u00ae First Trimester Vaginal Bleeding"],"prefix":"10.1016","volume":"15","author":[{"given":"Douglas L.","family":"Brown","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ann","family":"Packard","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katherine E.","family":"Maturen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sandeep Prakash","family":"Deshmukh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kika M.","family":"Dudiak","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tara L.","family":"Henrichsen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Benjamin J.","family":"Meyer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liina","family":"Poder","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elizabeth A.","family":"Sadowski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas D.","family":"Shipp","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lynn","family":"Simpson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Therese M.","family":"Weber","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carolyn M.","family":"Zelop","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Phyllis","family":"Glanc","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/j.jacr.2018.03.018_bib1","doi-asserted-by":"crossref","first-page":"524","DOI":"10.1016\/j.annepidem.2010.02.006","article-title":"Patterns and predictors of vaginal bleeding in the first trimester of pregnancy","volume":"20","author":"Hasan","year":"2010","journal-title":"Ann Epidemiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib2","doi-asserted-by":"crossref","first-page":"1061","DOI":"10.1016\/j.fertnstert.2012.09.018","article-title":"Early pregnancy failure: beware of the pitfalls of modern management","volume":"98","author":"Barnhart","year":"2012","journal-title":"Fertil Steril"},{"key":"10.1016\/j.jacr.2018.03.018_bib3","doi-asserted-by":"crossref","first-page":"75","DOI":"10.2214\/ajr.153.1.75","article-title":"Transvaginal sonography in the evaluation of normal early pregnancy: correlation with HCG level","volume":"153","author":"Bree","year":"1989","journal-title":"AJR Am J Roentgenol"},{"key":"10.1016\/j.jacr.2018.03.018_bib4","doi-asserted-by":"crossref","first-page":"655","DOI":"10.1148\/radiology.204.3.9280240","article-title":"Intradecidual sign: is it effective in diagnosis of an early intrauterine pregnancy?","volume":"204","author":"Laing","year":"1997","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib5","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1148\/radiology.161.2.3532191","article-title":"Intradecidual sign: a US criterion of early intrauterine pregnancy","volume":"161","author":"Yeh","year":"1986","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib6","doi-asserted-by":"crossref","first-page":"725","DOI":"10.2214\/ajr.183.3.1830725","article-title":"The intradecidual sign: is it reliable for diagnosis of early intrauterine pregnancy?","volume":"183","author":"Chiang","year":"2004","journal-title":"AJR Am J Roentgenol"},{"key":"10.1016\/j.jacr.2018.03.018_bib7","doi-asserted-by":"crossref","first-page":"1207","DOI":"10.7863\/ultra.32.7.1207","article-title":"Double sac sign and intradecidual sign in early pregnancy: interobserver reliability and frequency of occurrence","volume":"32","author":"Doubilet","year":"2013","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib8","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1002\/uog.14725","article-title":"Accuracy of first-trimester ultrasound in diagnosis of intrauterine pregnancy prior to visualization of the yolk sac: a systematic review and meta-analysis","volume":"46","author":"Richardson","year":"2015","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib9","doi-asserted-by":"crossref","first-page":"643","DOI":"10.1002\/uog.15966","article-title":"Use of double decidual sac sign to confirm intrauterine pregnancy location prior to sonographic visualization of embryonic contents","volume":"49","author":"Richardson","year":"2017","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib10","doi-asserted-by":"crossref","first-page":"389","DOI":"10.7863\/jum.2013.32.3.389","article-title":"Intrauterine fluid with ectopic pregnancy: a reappraisal","volume":"32","author":"Benson","year":"2013","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib11","doi-asserted-by":"crossref","first-page":"727","DOI":"10.1148\/radiology.189.3.8234696","article-title":"Decidual cyst: endovaginal sonographic sign of ectopic pregnancy","volume":"189","author":"Ackerman","year":"1993","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib12","doi-asserted-by":"crossref","first-page":"569","DOI":"10.1148\/radiology.205.2.9356647","article-title":"Treatment of ectopic pregnancy: is a human chorionic gonadotropin level of 2,000 mIU\/mL a reasonable threshold?","volume":"205","author":"Mehta","year":"1997","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib13","doi-asserted-by":"crossref","first-page":"951","DOI":"10.2214\/ajr.144.5.951","article-title":"Early gestation: correlation of HCG levels and sonographic identification","volume":"144","author":"Nyberg","year":"1985","journal-title":"AJR Am J Roentgenol"},{"key":"10.1016\/j.jacr.2018.03.018_bib14","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1097\/AOG.0b013e318278f421","article-title":"Reevaluation of discriminatory and threshold levels for serum beta-hCG in early pregnancy","volume":"121","author":"Connolly","year":"2013","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib15","doi-asserted-by":"crossref","first-page":"1637","DOI":"10.7863\/jum.2011.30.12.1637","article-title":"Further evidence against the reliability of the human chorionic gonadotropin discriminatory level","volume":"30","author":"Doubilet","year":"2011","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib16","doi-asserted-by":"crossref","first-page":"465","DOI":"10.7863\/ultra.33.3.465","article-title":"Time to revisit the human chorionic gonadotropin discriminatory level in the management of pregnancy of unknown location","volume":"33","author":"Ko","year":"2014","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib17","doi-asserted-by":"crossref","first-page":"1443","DOI":"10.1056\/NEJMra1302417","article-title":"Diagnostic criteria for nonviable pregnancy early in the first trimester","volume":"369","author":"Doubilet","year":"2013","journal-title":"N\u00a0Engl J Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib18","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1148\/radiology.167.2.3282258","article-title":"Early diagnosis of nonviable pregnancy with endovaginal US","volume":"167","author":"Levi","year":"1988","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib19","doi-asserted-by":"crossref","first-page":"497","DOI":"10.1002\/uog.10109","article-title":"Limitations of current definitions of miscarriage using mean gestational sac diameter and crown-rump length measurements: a multicenter observational study","volume":"38","author":"Abdallah","year":"2011","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib20","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1148\/radiology.203.1.9122395","article-title":"First-trimester US parameters of failed pregnancy","volume":"203","author":"Rowling","year":"1997","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib21","doi-asserted-by":"crossref","first-page":"h4579","DOI":"10.1136\/bmj.h4579","article-title":"Defining safe criteria to diagnose miscarriage: prospective observational multicentre study","volume":"351","author":"Preisler","year":"2015","journal-title":"BMJ"},{"key":"10.1016\/j.jacr.2018.03.018_bib22","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1016\/j.ejogrb.2016.02.015","article-title":"Pregnancy loss: French clinical practice guidelines","volume":"201","author":"Huchon","year":"2016","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"10.1016\/j.jacr.2018.03.018_bib23","doi-asserted-by":"crossref","first-page":"343","DOI":"10.1148\/radiology.192.2.8029394","article-title":"Slow embryonic heart rate in early first trimester: indicator of poor pregnancy outcome","volume":"192","author":"Benson","year":"1994","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib24","doi-asserted-by":"crossref","first-page":"643","DOI":"10.1148\/radiol.2362040880","article-title":"Outcome of first-trimester pregnancies with slow embryonic heart rate at 6-7 weeks gestation and normal heart rate by 8 weeks at US","volume":"236","author":"Doubilet","year":"2005","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib25","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1148\/radiology.178.2.1987595","article-title":"Small sac size in the first trimester: a predictor of poor fetal outcome","volume":"178","author":"Bromley","year":"1991","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib26","doi-asserted-by":"crossref","first-page":"359","DOI":"10.2214\/ajr.158.2.1729798","article-title":"Enlarged amniotic cavity: a new sonographic sign of early embryonic death","volume":"158","author":"Horrow","year":"1992","journal-title":"AJR Am J Roentgenol"},{"key":"10.1016\/j.jacr.2018.03.018_bib27","doi-asserted-by":"crossref","first-page":"117","DOI":"10.7863\/jum.1995.14.2.117","article-title":"The empty amnion: a sign of early pregnancy failure","volume":"14","author":"McKenna","year":"1995","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib28","doi-asserted-by":"crossref","first-page":"1331","DOI":"10.7863\/jum.2009.28.10.1331","article-title":"The expanded amnion sign: evidence of early embryonic death","volume":"28","author":"Yegul","year":"2009","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib29","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1148\/radiology.183.1.1549656","article-title":"Yolk sac diameter and shape at endovaginal US: predictors of pregnancy outcome in the first trimester","volume":"183","author":"Lindsay","year":"1992","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib30","doi-asserted-by":"crossref","first-page":"803","DOI":"10.1148\/radiology.200.3.8756935","article-title":"Subchorionic hemorrhage in first-trimester pregnancies: prediction of pregnancy outcome with sonography","volume":"200","author":"Bennett","year":"1996","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib31","doi-asserted-by":"crossref","first-page":"385","DOI":"10.1148\/radiol.2452061031","article-title":"Ectopic pregnancy","volume":"245","author":"Levine","year":"2007","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib32","doi-asserted-by":"crossref","first-page":"1661","DOI":"10.1148\/rg.286085506","article-title":"Diagnostic clues to ectopic pregnancy","volume":"28","author":"Lin","year":"2008","journal-title":"Radiographics"},{"key":"10.1016\/j.jacr.2018.03.018_bib33","doi-asserted-by":"crossref","first-page":"227","DOI":"10.3109\/00016347509157766","article-title":"Site of ovulation and ectopic pregnancy","volume":"54","author":"Saito","year":"1975","journal-title":"Acta Obstet Gynecol Scand"},{"key":"10.1016\/j.jacr.2018.03.018_bib34","first-page":"823","article-title":"The contralateral corpus luteum and tubal pregnancy","volume":"70","author":"Walters","year":"1987","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib35","doi-asserted-by":"crossref","first-page":"2270","DOI":"10.1007\/s00261-016-0780-1","article-title":"Radiological appearances of corpus luteum cysts and their imaging mimics","volume":"41","author":"Bonde","year":"2016","journal-title":"Abdom Radiol (NY)"},{"key":"10.1016\/j.jacr.2018.03.018_bib36","doi-asserted-by":"crossref","first-page":"498","DOI":"10.1002\/uog.1891","article-title":"Form and function of the corpus luteum during the human menstrual cycle","volume":"25","author":"Baerwald","year":"2005","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib37","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1002\/(SICI)1097-0096(199902)27:2<55::AID-JCU1>3.0.CO;2-T","article-title":"Sonographic spectrum of the corpus luteum in early pregnancy: gray-scale, color, and pulsed Doppler appearance","volume":"27","author":"Durfee","year":"1999","journal-title":"J\u00a0Clin Ultrasound"},{"key":"10.1016\/j.jacr.2018.03.018_bib38","doi-asserted-by":"crossref","first-page":"821","DOI":"10.7863\/jum.2001.20.8.821","article-title":"Sonographic and Doppler characteristics of the corpus luteum: can they predict pregnancy outcome?","volume":"20","author":"Frates","year":"2001","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib39","doi-asserted-by":"crossref","first-page":"697","DOI":"10.7863\/ultra.33.4.697","article-title":"Adnexal sonographic findings in ectopic pregnancy and their correlation with tubal rupture and human chorionic gonadotropin levels","volume":"33","author":"Frates","year":"2014","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib40","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1046\/j.1469-0705.1991.01030197.x","article-title":"Classification of tubal gestations by transvaginal sonography","volume":"1","author":"Rottem","year":"1991","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib41","doi-asserted-by":"crossref","first-page":"259","DOI":"10.7863\/jum.1994.13.4.259","article-title":"Transvaginal sonography for diagnosing ectopic pregnancy: positivity criteria and performance characteristics","volume":"13","author":"Brown","year":"1994","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib42","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1053\/ajem.2002.30101","article-title":"Isolated fluid in the cul-de-sac: how well does it predict ectopic pregnancy?","volume":"20","author":"Dart","year":"2002","journal-title":"Am J Emerg Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib43","doi-asserted-by":"crossref","first-page":"823","DOI":"10.1148\/radiology.178.3.1994425","article-title":"Extrauterine findings of ectopic pregnancy of transvaginal US: importance of echogenic fluid","volume":"178","author":"Nyberg","year":"1991","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib44","doi-asserted-by":"crossref","first-page":"520","DOI":"10.1016\/S0009-9260(98)80173-6","article-title":"Echogenic peritoneal fluid as an isolated sonographic finding: significance in patients at risk of ectopic pregnancy","volume":"53","author":"Wachsberg","year":"1998","journal-title":"Clin Radiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib45","doi-asserted-by":"crossref","first-page":"2031","DOI":"10.7863\/ultra.33.11.2031","article-title":"Three-dimensional sonography in the differential diagnosis of interstitial, angular, and intrauterine pregnancies in a septate uterus","volume":"33","author":"Tanaka","year":"2014","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib46","doi-asserted-by":"crossref","first-page":"7","DOI":"10.3109\/01443615.2010.522749","article-title":"Heterotopic pregnancy","volume":"31","author":"Talbot","year":"2011","journal-title":"J\u00a0Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib47","doi-asserted-by":"crossref","first-page":"857","DOI":"10.1016\/j.fertnstert.2010.09.006","article-title":"Pregnancy of unknown location: a consensus statement of nomenclature, definitions, and outcome","volume":"95","author":"Barnhart","year":"2011","journal-title":"Fertil Steril"},{"key":"10.1016\/j.jacr.2018.03.018_bib48","first-page":"493","article-title":"Pregnancies of unknown location. Best practice & research","volume":"23","author":"Kirk","year":"2009","journal-title":"Clin Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib49","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1002\/jcu.20779","article-title":"Best predictors of grayscale ultrasound combined with color Doppler in the diagnosis of retained products of conception","volume":"39","author":"Atri","year":"2011","journal-title":"J\u00a0Clin Ultrasound"},{"key":"10.1016\/j.jacr.2018.03.018_bib50","doi-asserted-by":"crossref","first-page":"1031","DOI":"10.7863\/jum.2009.28.8.1031","article-title":"Retained products of conception: spectrum of color Doppler findings","volume":"28","author":"Kamaya","year":"2009","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib51","doi-asserted-by":"crossref","first-page":"1371","DOI":"10.1148\/radiographics.16.6.8946542","article-title":"Gestational trophoblastic disease: a spectrum of radiologic diagnosis","volume":"16","author":"Green","year":"1996","journal-title":"Radiographics"},{"key":"10.1016\/j.jacr.2018.03.018_bib52","doi-asserted-by":"crossref","first-page":"589","DOI":"10.7863\/jum.1999.18.9.589","article-title":"Sonographic appearance of early complete molar pregnancies","volume":"18","author":"Lazarus","year":"1999","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib53","doi-asserted-by":"crossref","first-page":"188","DOI":"10.1046\/j.1469-0705.2000.00201.x","article-title":"Sonographic appearance of first trimester complete hydatidiform moles","volume":"16","author":"Benson","year":"2000","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib54","doi-asserted-by":"crossref","first-page":"70","DOI":"10.1002\/uog.3875","article-title":"The accuracy of first trimester ultrasound in the diagnosis of hydatidiform mole","volume":"29","author":"Kirk","year":"2007","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib55","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1002\/jcu.22410","article-title":"Sonographic diagnosis of partial versus complete molar pregnancy: a reappraisal","volume":"45","author":"Savage","year":"2017","journal-title":"J\u00a0Clin Ultrasound"},{"key":"10.1016\/j.jacr.2018.03.018_bib56","doi-asserted-by":"crossref","first-page":"769","DOI":"10.1148\/radiology.191.3.8184061","article-title":"Tubal rupture in patients with ectopic pregnancy: diagnosis with transvaginal US","volume":"191","author":"Frates","year":"1994","journal-title":"Radiology"},{"key":"10.1016\/j.jacr.2018.03.018_bib57","unstructured":"World Federation for Ultrasound in Medicine and Biology. WFUMB\/ISUOG. Safety statements. Statement on the safe use of Doppler ultrasound during 11-14 week scans (or earlier in pregnancy). Available at: http:\/\/www.wfumb.org\/safety-statements\/. Accessed December 4,\u00a02017."},{"key":"10.1016\/j.jacr.2018.03.018_bib58","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1097\/GRF.0000000000000256","article-title":"Ultrasound in assisted reproductive technologies and the first trimester: is there a risk?","volume":"60","author":"Abramowicz","year":"2017","journal-title":"Clin Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib59","doi-asserted-by":"crossref","first-page":"572","DOI":"10.1016\/S1701-2163(16)30716-2","article-title":"Obstetric ultrasound biological effects and safety","volume":"27","author":"Bly","year":"2005","journal-title":"J\u00a0Obstet Gynaecol Can"},{"key":"10.1016\/j.jacr.2018.03.018_bib60","doi-asserted-by":"crossref","first-page":"15","DOI":"10.7863\/jum.2005.24.1.15","article-title":"Sonographic and Doppler imaging in the diagnosis and treatment of gestational trophoblastic disease: a 12-year experience","volume":"24","author":"Zhou","year":"2005","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib61","doi-asserted-by":"crossref","first-page":"810","DOI":"10.6061\/clinics\/2015(12)08","article-title":"Is Doppler ultrasound useful for evaluating gestational trophoblastic disease?","volume":"70","author":"Lin","year":"2015","journal-title":"Clinics (Sao Paulo)"},{"key":"10.1016\/j.jacr.2018.03.018_bib62","doi-asserted-by":"crossref","first-page":"731.e1","DOI":"10.1016\/j.ajog.2015.12.024","article-title":"Ultrasound diagnosis and management of acquired uterine enhanced myometrial vascularity\/arteriovenous malformations","volume":"214","author":"Timor-Tritsch","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib63","doi-asserted-by":"crossref","first-page":"343","DOI":"10.7863\/jum.2008.27.3.343","article-title":"Sonography of uterine abnormalities in postpartum and postabortion patients: a potential pitfall of interpretation","volume":"27","author":"Rufener","year":"2008","journal-title":"J\u00a0Ultrasound Med"},{"key":"10.1016\/j.jacr.2018.03.018_bib64","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1097\/RUQ.0b013e3181b5451e","article-title":"Imaging and diagnosis of postpartum complications: sonography and other imaging modalities","volume":"25","author":"Kamaya","year":"2009","journal-title":"Ultrasound Q"},{"key":"10.1016\/j.jacr.2018.03.018_bib65","doi-asserted-by":"crossref","first-page":"1145","DOI":"10.1177\/0284185113514222","article-title":"Ultrasonographic indications for conservative treatment in pregnancy-related uterine arteriovenous malformations","volume":"55","author":"Lee","year":"2014","journal-title":"Acta Radiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib66","doi-asserted-by":"crossref","first-page":"570","DOI":"10.1002\/uog.159","article-title":"Color Doppler imaging is a valuable tool for the diagnosis and management of uterine vascular malformations","volume":"21","author":"Timmerman","year":"2003","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jacr.2018.03.018_bib67","doi-asserted-by":"crossref","first-page":"325","DOI":"10.2214\/AJR.09.3723","article-title":"CT and MRI of early intrauterine pregnancy","volume":"196","author":"Shin","year":"2011","journal-title":"AJR Am J Roentgenol"},{"key":"10.1016\/j.jacr.2018.03.018_bib68","doi-asserted-by":"crossref","first-page":"904","DOI":"10.2214\/AJR.13.10644","article-title":"Beyond ultrasound: CT and MRI of ectopic pregnancy","volume":"202","author":"Kao","year":"2014","journal-title":"AJR Am J Roentgenol"},{"key":"10.1016\/j.jacr.2018.03.018_bib69","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1007\/s00330-004-2306-4","article-title":"Interstitial pregnancy: role of MRI","volume":"15","author":"Filhastre","year":"2005","journal-title":"Eur Radiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib70","doi-asserted-by":"crossref","first-page":"918","DOI":"10.1002\/jmri.1131","article-title":"Characteristic MR findings of cervical pregnancy","volume":"13","author":"Jung","year":"2001","journal-title":"J\u00a0Magn Reson Imaging"},{"key":"10.1016\/j.jacr.2018.03.018_bib71","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.crad.2013.07.021","article-title":"First trimester caesarean scar ectopic pregnancy evaluation using MRI","volume":"69","author":"Peng","year":"2014","journal-title":"Clin Radiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib72","unstructured":"ACR. Manual on Contrast Media. Available at: http:\/\/www.acr.org\/Quality-Safety\/Resources\/Contrast-Manual. Accessed December 4,\u00a02017."},{"key":"10.1016\/j.jacr.2018.03.018_bib73","doi-asserted-by":"crossref","first-page":"952","DOI":"10.1001\/jama.2016.12126","article-title":"Association between MRI exposure during pregnancy and fetal and childhood outcomes","volume":"316","author":"Ray","year":"2016","journal-title":"JAMA"},{"key":"10.1016\/j.jacr.2018.03.018_bib74","doi-asserted-by":"crossref","first-page":"781","DOI":"10.1148\/rg.333125177","article-title":"Physiologic, histologic, and imaging features of retained products of conception","volume":"33","author":"Sellmyer","year":"2013","journal-title":"Radiographics"},{"key":"10.1016\/j.jacr.2018.03.018_bib75","first-page":"842751","article-title":"Gestational trophoblastic disease: a multimodality imaging approach with impact on diagnosis and management","volume":"2014","author":"Dhanda","year":"2014","journal-title":"Radiol Res Pract"},{"key":"10.1016\/j.jacr.2018.03.018_bib76","doi-asserted-by":"crossref","first-page":"2485","DOI":"10.1016\/j.ejrad.2015.10.005","article-title":"Vascular uterine abnormalities: comparison of imaging findings and clinical outcomes","volume":"84","author":"Hugues","year":"2015","journal-title":"Eur J Radiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib77","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1007\/s10140-007-0666-1","article-title":"MDCT diagnosis of ruptured tubal pregnancy with massive hemoperitoneum","volume":"15","author":"Coulier","year":"2008","journal-title":"Emerg Radiol"},{"key":"10.1016\/j.jacr.2018.03.018_bib78","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1007\/s00261-006-9039-6","article-title":"Adnexal ring of ectopic pregnancy detected by contrast-enhanced CT","volume":"32","author":"Pham","year":"2007","journal-title":"Abdom Imaging"},{"key":"10.1016\/j.jacr.2018.03.018_bib79","unstructured":"ACR. ACR-SPR Practice parameter for imaging pregnant or potentially pregnant adolescents and women with ionizing radiation. Available at: http:\/\/www.acr.org\/\u223c\/media\/ACR\/Documents\/PGTS\/guidelines\/Pregnant_Patients.pdf. Accessed December 4,\u00a02017."},{"key":"10.1016\/j.jacr.2018.03.018_bib80","unstructured":"ACR. ACR-ACOG-AIUM-SRU practice parameter for the performance of obstetrical ultrasound. Available at: http:\/\/www.acr.org\/\u223c\/media\/ACR\/Documents\/PGTS\/guidelines\/US_Obstetrical.pdf. Accessed December 4,\u00a02017."},{"key":"10.1016\/j.jacr.2018.03.018_bib81","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1002\/jmri.24011","article-title":"ACR guidance document on MR safe practices: 2013","volume":"37","author":"Kanal","year":"2013","journal-title":"J\u00a0Magn Reson Imaging"},{"key":"10.1016\/j.jacr.2018.03.018_bib82","unstructured":"ACR. ACR Appropriateness Criteria\u00ae radiation dose assessment introduction. Available at: https:\/\/www.acr.org\/\u223c\/media\/ACR\/Documents\/AppCriteria\/RadiationDoseAssessmentIntro.pdf. Accessed December 4,\u00a02017."}],"container-title":["Journal of the American College of Radiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1546144018303466?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1546144018303466?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2018,8,22]],"date-time":"2018-08-22T04:52:51Z","timestamp":1534913571000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S1546144018303466"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,5]]},"references-count":82,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2018,5]]}},"alternative-id":["S1546144018303466"],"URL":"https:\/\/doi.org\/10.1016\/j.jacr.2018.03.018","relation":{},"ISSN":["1546-1440"],"issn-type":[{"value":"1546-1440","type":"print"}],"subject":[],"published":{"date-parts":[[2018,5]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"ACR Appropriateness Criteria\u00ae First Trimester Vaginal Bleeding","name":"articletitle","label":"Article Title"},{"value":"Journal of the American College of Radiology","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.jacr.2018.03.018","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2018 American College of Radiology","name":"copyright","label":"Copyright"}]}}