Question 308
{"accessible":false,"alternatives":[{"id":1500,"text":"double lumen with a gradient of contrast between the two on post-contrast CT"},{"id":1501,"text":"high-attenuating cresenteric regions of eccentrically thickened aortic wall on non-contrast CT"},{"id":1502,"text":"hyperdense intramural material compared to the aortic lumen on post-contrast CT"},{"id":1503,"text":"irregular low-attenuating intimal flap directed along the axis of blood flow on post-contrast CT"},{"id":1504,"text":"mural calcification displaced peripherally on non-contrast CT"}],"archived":false,"correctAlternativeId":1501,"explanation":"\u003cp\u003eAcute intramural hematomas appear as focal, crescentic, high-attenuating (60-70 HU) regions of eccentrically thickened aortic wall on non-contrast CT. Narrow window width is essential for identifying subtle lesions. Intimal calcification may be displaced inwards, best appreciated on non contrast phase.\u003c/p\u003e\u003cp\u003eThe lesions exhibit low attenuation in relation to the aortic lumen on post-contrast CT and can be far more subtle, hence a non contrast phase before CTA is often used in an acute aortic syndrome protocol. Unlike aortic dissection, no intimal flap is present on the CTA.\u003c/p\u003e","id":308,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2016","nextQuestionPath":"/articles/aortic-intramural-haematoma/questions/289","relatedArticles":[{"id":12392,"title":"Acute aortic syndrome","link":"/articles/acute-aortic-syndrome?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich finding on CT is typical of aortic intramural hematoma?\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/308"}],"attemptsPercentages":[{"alternativeId":"1501","percentage":71},{"alternativeId":"1503","percentage":5},{"alternativeId":"1504","percentage":6},{"alternativeId":"1500","percentage":9},{"alternativeId":"1502","percentage":10}],"promptToLogin":false,"questionManager":false,"articleId":"aortic-intramural-hematoma"}