Question 2340
{"accessible":false,"alternatives":[{"id":11558,"text":"diffusion weighted"},{"id":11559,"text":"proton density weighted"},{"id":11560,"text":"T1 weighted"},{"id":11561,"text":"T2 weighted"}],"archived":false,"correctAlternativeId":11560,"explanation":"\u003cp\u003eA short echo time after the initial 90 degree pulse ensures that a minimal amount of transverse (T2) relaxation has occurred. The use of a short TR ensures that the magnetisation M is not fully recovered towards M\u003csub\u003e0\u003c/sub\u003e, highlighting different rates of T1 relaxation.\u003c/p\u003e","id":2340,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2962","nextQuestionPath":"/articles/spin-echo-sequences/questions/542","relatedArticles":[{"id":22558,"title":"MRI physics","link":"/articles/mri-physics?lang=gb"}],"alsoUsedIn":[{"id":1342,"kind":"Course","title":"2022 Virtual Conference Private Use - page 1342","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/1342"},{"id":1200,"kind":"Course","title":"2022 Virtual Conference Private Use - page 1200","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/1200"},{"id":248,"kind":"LiveSchedule","title":"248","link":"https://radiopaedia.org/admin/live_schedules/248"},{"id":152,"kind":"LiveSchedule","title":"152","link":"https://radiopaedia.org/admin/live_schedules/152"},{"id":1267,"kind":"Course","title":"2022 Virtual Conference Private Use - page 1267","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/1267"},{"id":1267,"kind":"Course","title":"Imaging Physics Lectures - page 1267","link":"https://radiopaedia.org/courses/imaging-physics-lectures/pages/1267"}],"stem":"\u003cp\u003eA spin echo pulse sequence which has a short TR and short TE will appear 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/2340"}],"attemptsPercentages":[{"alternativeId":"11559","percentage":22},{"alternativeId":"11558","percentage":7},{"alternativeId":"11560","percentage":61},{"alternativeId":"11561","percentage":11}],"promptToLogin":false,"questionManager":false,"articleId":"spin-echo-sequences"}