Susceptibility Weighted Imaging (SWI) - Video Lesson

Hey everybody. Welcome to today's lesson on MRI contrast. This lesson focuses on a specialized weighting called Susceptibility Weighted Imaging or SWI. This lesson discusses SWI's mechanisms, its contrast mechanisms, and its practical applications in clinical settings. Let's dive in. Magnetic susceptibility refers to how much certain materials become magnetized when placed in a magnetic field. This has to do with the material's composition and structure. Bones primarily contain calcium compounds and other minerals that do not have free electrons to align with the magnetic field easily. But muscle and fat have higher magnetic susceptibilities because they contain a lot of hydrogen atoms. Susceptibility weighted imaging, SWI, uses the magnetic susceptibility differences between various tissues and