Question 2133
{"accessible":true,"alternatives":[{"id":10593,"text":"calcification"},{"id":10594,"text":"deoxyhemoglobin"},{"id":10595,"text":"fat"},{"id":10596,"text":"flowing blood"},{"id":10597,"text":"methemoglobin"}],"archived":false,"correctAlternativeId":10597,"explanation":"\u003cp\u003eT1 weighted fat saturated\u0026nbsp;sequences can show a high-crescent around the lumen of a dissected vessel. Early T1W signal is usually hypointense, with T1W hyperintensity corresponding with methemoglobin. This can be difficult to detect on normal T1W sequences so fat-saturated sequences are particularly useful.\u003c/p\u003e","id":2133,"imageUrl":"https://prod-images-static.radiopaedia.org/images/8187228/ce66c625774072cf8e9aa875ccce50_big_gallery.jpg","imageAttribution":{"kind":"case","rID":30889},"imageAttributionCaseInfo":{"title":"Internal carotid artery dissection","contributor_name":"Devanshi Dharaiya","contributor_param":"devanshi","case_rid":30889,"case_param":"internal-carotid-artery-dissection-2"},"firstQuestionPath":"/questions/2133","nextQuestionPath":"/articles/haemorrhage-on-mri/questions/2043","relatedArticles":[{"id":6695,"title":"Crescent sign of arterial dissection","link":"/articles/crescent-sign-of-arterial-dissection?lang=us"},{"id":6692,"title":"Internal carotid artery dissection","link":"/articles/internal-carotid-artery-dissection-1?lang=us"}],"alsoUsedIn":[{"id":985,"kind":"Course","title":"2021 Virtual Conference Private Use - page 985","link":"https://radiopaedia.org/courses/2021-virtual-conference-private-use/pages/985"},{"id":985,"kind":"Course","title":"2022 Virtual Conference Private Use - page 985","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/985"},{"id":970,"kind":"RestrictedPage","title":"Page 970 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/970"},{"id":955,"kind":"RestrictedPage","title":"Page 955 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/955"},{"id":1,"kind":"LiveSchedule","title":"1","link":"https://radiopaedia.org/admin/live_schedules/1"},{"id":21,"kind":"LiveSchedule","title":"21","link":"https://radiopaedia.org/admin/live_schedules/21"},{"id":933,"kind":"Course","title":"2021 Virtual Conference Private Use - page 933","link":"https://radiopaedia.org/courses/2021-virtual-conference-private-use/pages/933"},{"id":933,"kind":"Course","title":"CT \u0026 MRI Lectures - page 933","link":"https://radiopaedia.org/courses/ct-mri-lectures/pages/933"}],"stem":"\u003cp\u003eThis 50-year-old man experienced neck pain, with left pupillary abnormality and swallowing difficulty. An MRI is performed a few days later, with the T1W fat saturated sequence confirming the left internal carotid artery dissection. What is the hyperintensity on the T1FS sequence?\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/2133"}],"attemptsPercentages":[{"alternativeId":"10597","percentage":64},{"alternativeId":"10593","percentage":4},{"alternativeId":"10594","percentage":21},{"alternativeId":"10595","percentage":3},{"alternativeId":"10596","percentage":7}],"promptToLogin":false,"questionManager":false,"articleId":"hemorrhage-on-mri"}