Question 197
{"accessible":false,"alternatives":[{"id":951,"text":"compressed by the false lumen and the smaller of the two"},{"id":952,"text":"compressing the false lumen and the larger of the two"},{"id":953,"text":"of lower contrast density due to delayed opacification"},{"id":954,"text":"of higher contrast density due to delayed opacification"}],"archived":false,"correctAlternativeId":951,"explanation":"\u003cp\u003eAn essential part of the assessment of aortic dissection is identifying the true lumen, as the placement of an endoluminal stent graft in the false lumen can have dire consequences.\u003c/p\u003e\u003cp\u003eThe false lumen is often larger in size due to higher false luminal pressures, and, will often be of a lower contrast density due to the time delay in contrast opacification and relative\u0026nbsp;size to the true lumen.\u003c/p\u003e\u003cp\u003e\u0026nbsp;\u003c/p\u003e","id":197,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2658","nextQuestionPath":"/articles/aortic-dissection/questions/196","relatedArticles":[],"alsoUsedIn":[{"id":629,"kind":"Course","title":"Radiopaedia 2020 - Lectures Only - page 629","link":"https://radiopaedia.org/courses/radiopaedia-2020-exclusive/pages/629"},{"id":629,"kind":"Course","title":"2020 Virtual Conference Private Use - page 629","link":"https://radiopaedia.org/courses/2020-virtual-conference-private-use/pages/629"},{"id":690,"kind":"Course","title":"Abdominal Emergency Radiology Course - page 690","link":"https://radiopaedia.org/courses/abdominal-emergency-radiology-course-online/pages/690"},{"id":690,"kind":"Course","title":"2020 Virtual Conference Private Use - page 690","link":"https://radiopaedia.org/courses/2020-virtual-conference-private-use/pages/690"},{"id":1411,"kind":"Course","title":"Emergency Radiology Course - page 1411","link":"https://radiopaedia.org/courses/emergency-radiology-course-online/pages/1411"},{"id":1411,"kind":"Course","title":"Emergency Radiology Course - Melbourne - page 1411","link":"https://radiopaedia.org/courses/emergency-radiology-course-melbourne-2022/pages/1411"},{"id":1411,"kind":"Course","title":"Emergency Radiology Course - Brisbane - page 1411","link":"https://radiopaedia.org/courses/emergency-radiology-course-brisbane-2022/pages/1411"}],"stem":"\u003cp\u003eThe true lumen of an aortic dissection is often...\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/197"}],"attemptsPercentages":[{"alternativeId":"951","percentage":86},{"alternativeId":"954","percentage":5},{"alternativeId":"953","percentage":4},{"alternativeId":"952","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"aortic-dissection"}