Question 2255
{"accessible":false,"alternatives":[{"id":11173,"text":"capillary permeability"},{"id":11174,"text":"capillary pH"},{"id":11175,"text":"local neuronal activity"},{"id":11176,"text":"local oxygen extraction"}],"archived":false,"correctAlternativeId":11173,"explanation":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eKtrans\u003c/strong\u003e\u003c/em\u003e\u0026nbsp;is a measure of capillary permeability obtained using\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/dynamic-contrast-enhanced-dce-mr-perfusion-1\"\u003edynamic contrast-enhanced (DCE) MR perfusion\u003c/a\u003e. It is calculated by measuring the accumulation of\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/gadolinium-contrast-agents\"\u003egadolinium\u003c/a\u003e-based contrast agent in the extravascular-extracellular space.\u0026nbsp;\u003c/p\u003e","id":2255,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2255","nextQuestionPath":null,"relatedArticles":[{"id":31014,"title":"MR perfusion weighted imaging","link":"/articles/mr-perfusion-weighted-imaging-1?lang=us"}],"alsoUsedIn":[{"id":1183,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1183","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1183"},{"id":1183,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1183","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1183"}],"stem":"\u003cp\u003ek-trans in MRI perfusion is a measure of...\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/2255"}],"attemptsPercentages":[{"alternativeId":"11173","percentage":83},{"alternativeId":"11176","percentage":11},{"alternativeId":"11174","percentage":2},{"alternativeId":"11175","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"k-trans-mr-perfusion"}