Question 2677
{"accessible":false,"alternatives":[{"id":13097,"text":"12-18 weeks gestation"},{"id":13098,"text":"20-24 weeks gestation"},{"id":13099,"text":"28-32 weeks gestation"},{"id":13100,"text":"36-40 weeks gestation"}],"archived":false,"correctAlternativeId":13099,"explanation":"\u003cp\u003eThe optimal time for scanning is between 28-32 weeks gestation as recommended by the joint Society of Abdominal Radiology (SAR) and European Society of Urogenital Radiology (ESUR) established guidelines to standardize MRI use in the diagnosis of placenta accreta spectrum disorders that was published in 2020.\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003eBefore 24 weeks: \u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eimmature placenta and vessel proliferation cannot be differentiated from signs of PASD\u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003eunreliable prediction of abnormal placentation\u003c/p\u003e\u003c/li\u003e\n\u003c/ul\u003e\u003cp\u003eAfter 32 weeks: \u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003einternal placental signal becomes more heterogenous\u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003emyometrial thinning can lead to false +ve diagnosis\u003c/p\u003e\u003c/li\u003e\n\u003c/ul\u003e","id":2677,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2678","nextQuestionPath":"/articles/placenta-increta/questions/2676","relatedArticles":[{"id":13176,"title":"Placenta accreta","link":"/articles/placenta-accreta?lang=us"},{"id":13496,"title":"Placenta percreta","link":"/articles/placenta-percreta?lang=us"},{"id":7781,"title":"Placenta accreta spectrum disorders","link":"/articles/placenta-accreta-spectrum-disorders?lang=us"}],"alsoUsedIn":[{"id":1491,"kind":"Course","title":"2023 Virtual Conference Private Use - page 1491","link":"https://radiopaedia.org/courses/2023-virtual-conference-private-use/pages/1491"},{"id":1491,"kind":"Course","title":"Obstetrics \u0026 Gynaecology Lectures - page 1491","link":"https://radiopaedia.org/courses/obgyn-lectures/pages/1491"}],"stem":"\u003cp\u003eIn placenta accreta spectrum disorder, when is the optimal time for MRI scanning?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2677"}],"attemptsPercentages":[{"alternativeId":"13097","percentage":1},{"alternativeId":"13100","percentage":2},{"alternativeId":"13098","percentage":7},{"alternativeId":"13099","percentage":90}],"promptToLogin":false,"questionManager":false,"articleId":"placenta-increta"}