Question 2263
{"accessible":true,"alternatives":[{"id":11210,"text":"chemical shift artefact"},{"id":11211,"text":"flow-related artefact"},{"id":11212,"text":"india ink artefact"},{"id":11213,"text":"phase mismapping artefact"},{"id":11214,"text":"zipper artefact"}],"archived":false,"correctAlternativeId":11210,"explanation":"\u003cp\u003eThis is a nice example of a \u003ca href=\"/articles/chemical-shift-artifact-1\" title=\"Chemical shift artefact\"\u003echemical shift artefact\u003c/a\u003e with frequency encoding in the AP direction. It occurs as a result of\u0026nbsp;fat of the orbit interfacing with enhancing blood within an orbital cavernous hemangioma.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIndia-ink artefact is also a chemical shift phenomenon but occurs on gradient-echo sequences.\u0026nbsp;\u003c/p\u003e","id":2263,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/469/Untitled.key7abry_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":5347},"imageAttributionCaseInfo":{"title":"Orbital cavernous hemangioma - extra conal","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":5347,"case_param":"orbital-cavernous-haemangioma-extra-conal"},"firstQuestionPath":"/questions/2263","nextQuestionPath":null,"relatedArticles":[{"id":16558,"title":"Zipper artifact","link":"/articles/zipper-artifact?lang=us"},{"id":1868,"title":"Phase-encoded motion artifact","link":"/articles/phase-encoded-motion-artifact-3?lang=us"},{"id":1103,"title":"Chemical shift artifact","link":"/articles/chemical-shift-artifact-1?lang=us"}],"alsoUsedIn":[{"id":1173,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1173","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1173"},{"id":1173,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1173","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1173"}],"stem":"\u003cp\u003eWhat MRI artefact is demonstrated in the accompanying post-contrast T1-weighted fast spin echo image?\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/2263"}],"attemptsPercentages":[{"alternativeId":"11212","percentage":8},{"alternativeId":"11211","percentage":4},{"alternativeId":"11213","percentage":9},{"alternativeId":"11210","percentage":77},{"alternativeId":"11214","percentage":2}],"promptToLogin":false,"questionManager":false,"articleId":"black-boundary-artifact"}