This presentation will demonstrate the technical and clinical applications of contrast enhanced and non-contrast magnetic resonance angiography (MRA). MRA is routinely used to evaluate the vasculature in a non–invasive fashion. Contrast enhanced MRA can be implemented as a conventional timed flow arrest protocol or as time resolved dynamic imaging. The technical aspects of both of these approaches will be described in detail. Several different Gadolinium based contrast agents are routinely used for CEMRA including both extracellular and blood pool agents. Methods for optimal utilization of contrast agents for MRA will be described. Because of the risk of NSF with gadolinium use in patients with renal failure, there has been renewed interest in non contrast MRA techniques. Several of these NCMRA approaches will be discussed. Through a series of case presentations, this talk will attempt to illustrate the optimal use of all of these techniques in clinical practice. At the end of this lecture, attendees should understand the basic technical principles for CEMRA and NCMRA and will also be more familiar with the appropriate clinical indications for using these techniques.