MEDizzy
MEDizzy
MRI Technologist
MRI Technologistover 8 years ago
Pre- and Postcontrast SWI

Pre- and Postcontrast SWI

Hemorrhages can be easily distinguished from veins if SWI is performed both before and after administration of contrast agent. Blood vessels will change their signal intensity due to the contrast agent, but signal intensity from hemorrhage will not change. Fig (left) Precontrast SWI shows a small hemorrhage inside the tumor (arrow). (right) In postcontrast SWI, a new hypointense signal intensity appears after contrast agent injection, which indicates the presence of intratumoral vessels; the signal intensity from the hemorrhage inside the tumor remains unchanged (arrow). Mittal et al. 2009

0
Other commentsSign in to post comments. You don't have an account? Sign up now!

Recent MCQs















Show more MCQs

Recent flashcard sets















Show more flashcards