Flow-Dependent (Non-Contrast Enhanced) Angiography - Video Lesson

Hey, everybody. Welcome to today's lesson on MRI imaging techniques. This lesson focuses on flow dependent angiography, in particular, inflow magnetic resonance angiography or inflow MRA. We will discuss the mechanisms behind inflow MRA, two d versus three d angiograms, and the advantages and disadvantages of these techniques. It is important to understand these concepts so you can best optimize your imaging protocols. Let's get started. Flow dependent angiography is a non contrast enhanced MRI imaging technique. In flow dependent angiography, we use the flow phenomena of blood to enhance the diagnostic image. This allows us to provide a non invasive imaging option to patients, particularly those with contraindications to gadolinium based contrasts. When conducting flow dependent angiography, we may use either bright blood imaging techniques where blood has high signal intensity or black.