Contrast Timing Methods - Video Lesson

Hey, everyone. Welcome to today's lesson on contrast timing methods used in MRI. In this lesson, we will discuss the test bolus technique, manual fluoroscopic triggering, automatic fluoroscopic triggering, and the time resolved method. Let's get started. Gadolinium based contrast agents shorten T1 relaxation time, making arterial blood appear bright on T1 weighted gradient echo sequences. For optimal arterial phase imaging, the center of K space must be filled when arterial gadolinium concentration is at its peak. A timing error of just three to six seconds can result in venous contamination or other artifacts, and render the study non diagnostic. There are four main strategies that can be used for contrast timing: a test bolus technique, manual fluoro triggering, automatic fluoro triggering, or