Question 1789
{"accessible":false,"alternatives":[{"id":8886,"text":"ADC pseudonormalisation"},{"id":8887,"text":"early DWI reversal"},{"id":8888,"text":"fogging phenomenon"},{"id":8889,"text":"pseudolaminar necrosis"},{"id":8890,"text":"T2 shine through"}],"archived":false,"correctAlternativeId":8887,"explanation":"\u003cp\u003e\u003cstrong\u003eEarly DWI reversal \u003c/strong\u003ein ischaemic stroke\u0026nbsp;(also referred to as\u0026nbsp;\u003cstrong\u003ediffusion lesion reversal\u003c/strong\u003e) is encountered early in the course of ischaemic infarction, most frequently in the setting of reperfusion within 3 to 6 hours of onset.\u003c/p\u003e\u003cp\u003eIt is defined as the interval disappearance of the initially visible increased DWI signal on a repeat MRI scan.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIn the vast majority of cases, however, it is transient and the abnormal DWI signal returns and\u0026nbsp;it does not represent true reversal (i.e. the region of the brain initially demonstrating reduced\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/apparent-diffusion-coefficient-1?lang=gb\"\u003eADC values\u003c/a\u003e\u0026nbsp;goes on to infarct regardless of whether early DWI reversal is demonstrated).\u003c/p\u003e","id":1789,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1790","nextQuestionPath":"/articles/fogging-phenomenon-cerebral-infarct/questions/1783","relatedArticles":[{"id":10716,"title":"T2 shine through","link":"/articles/t2-shine-through?lang=gb"},{"id":41739,"title":"Early DWI reversal in ischaemic stroke","link":"/articles/early-dwi-reversal-in-ischaemic-stroke?lang=gb"},{"id":41740,"title":"ADC pseudonormalisation","link":"/articles/adc-pseudonormalisation?lang=gb"}],"alsoUsedIn":[{"id":771,"kind":"Course","title":"Stroke Learning Pathway - page 771","link":"https://radiopaedia.org/courses/stroke-learning-pathway/pages/771"},{"id":2108,"kind":"Course","title":"Stroke Learning Pathway - peer review - page 2108","link":"https://radiopaedia.org/courses/stroke-learning-pathway-peer-review/pages/2108"}],"stem":"\u003cp\u003eIn the setting of ischaemic strokes, the return of DWI signal to normal after early reperfusion (i.e. within 3 to 6 hours of onset) is occasionally encountered and is known as...\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/1789"}],"attemptsPercentages":[{"alternativeId":"8888","percentage":17},{"alternativeId":"8887","percentage":60},{"alternativeId":"8886","percentage":18},{"alternativeId":"8890","percentage":4},{"alternativeId":"8889","percentage":1}],"promptToLogin":false,"questionManager":false,"articleId":"fogging-phenomenon-cerebral-infarct"}