MRI for Cardiac Physics (Procedures) - Video Lesson

Hey, everybody. Welcome to this lesson on MRI cardiac physics. In this lesson, we will discuss characteristics of the cardiac cycle, perspective gating, retrospective gating, acquisition window, trigger delay, and trigger window. Let's get started. The heart presents a unique challenge in magnetic resonance imaging due to the rapid periodic motion throughout both the cardiac and respiratory cycles. To produce diagnostic images, data acquisition must be precisely synchronized with the cardiac phase while the patient is holding their breath to reduce respiratory motion. These are some of the reasons cardiac MRI techniques are so complex. ECG gating is one method to reduce motion, which integrates with the scanner via MR compatible leads, typically three or four electrodes connected to pads placed on the patient's chest.