Question 1419
{"accessible":false,"alternatives":[{"id":7070,"text":"diffusion weighted imaging (DWI)"},{"id":7071,"text":"fluid attenuated inversion recovery (FLAIR)"},{"id":7072,"text":"susceptibility weighted imaging (SWI) "},{"id":7073,"text":"T1 weighted sequences"},{"id":7074,"text":"T2 weighted sequences"}],"archived":false,"correctAlternativeId":7072,"explanation":"\u003cp\u003eSusceptibility weighted imaging (SWI) is an MRI sequence that is particularly sensitive to compounds that distort the local magnetic field, and as such make it useful in detecting blood products, calcium, etc.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIn some situations (e.g. microhemorrhages) lesions that are apparent on SWI will be invisible on less sensitive sequences such as routine T1 and T2 weighted sequences.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIf SWI is not available, the b=0 images from diffusion-weighted imaging are better than nothing as they are (usually) T2* echoplanar images that are somewhat sensitive.\u0026nbsp;\u003c/p\u003e","id":1419,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2962","nextQuestionPath":"/articles/diffusion-weighted-imaging-2/questions/1077","relatedArticles":[{"id":5852,"title":"T1 weighted image","link":"/articles/t1-weighted-image?lang=us"},{"id":21760,"title":"Fluid attenuated inversion recovery","link":"/articles/fluid-attenuated-inversion-recovery?lang=us"},{"id":6345,"title":"T2 weighted image","link":"/articles/t2-weighted-image?lang=us"}],"alsoUsedIn":[{"id":510,"kind":"Course","title":"Neurodegenerative Learning Pathway - page 510","link":"https://radiopaedia.org/courses/neurodegenerative-learning-pathway/pages/510"},{"id":1070,"kind":"Course","title":"Neurodegenerative Learning Pathway - page 1070","link":"https://radiopaedia.org/courses/neurodegenerative-learning-pathway/pages/1070"}],"stem":"\u003cp\u003eWhen assessing for the presence of small hemorrhagic lesions (such as microhemorrhages or cavernomas) which of the following sequences is most sensitive?\u0026nbsp;\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/1419"}],"attemptsPercentages":[{"alternativeId":"7072","percentage":84},{"alternativeId":"7070","percentage":5},{"alternativeId":"7073","percentage":3},{"alternativeId":"7071","percentage":4},{"alternativeId":"7074","percentage":4}],"promptToLogin":false,"questionManager":false,"articleId":"diffusion-weighted-imaging"}