Physics Just the Basics Series #05 - Movies of the beating heart with CINE-MRI-Physics Just the Basics - Movies of the beating heart with CINE-MRI

Video Transcription

Video Summary

This webinar from the SCMR’s “MRI Physics Just the Basics” series explains cine cardiac MRI, focusing on how to create motion “movies” of the beating heart. Dr. Anthony Alatros describes cine MRI as a reference standard for measuring cardiac function, including ejection fraction, volumes, and myocardial mass. He compares MRI image acquisition to video recording, emphasizing the need for adequate temporal resolution, breath-holding, and avoidance of blurring.<br /><br />The talk reviews gradient echo imaging and balanced SSFP, explaining why balanced SSFP is the routine clinical choice at 1.5T because it provides better signal and blood-myocardium contrast through magnetization “recycling.” The lecture then covers ECG gating and the three main triggering strategies: prospective gating, retrospective sorting, and fully retrospective methods. It also explains view sharing, segmented acquisition, CAPTR (sorting data by cardiac phase relative to the RR interval), and arrhythmia rejection.<br /><br />Clinical challenges such as poor breath-holding, tachycardia, pediatric imaging, and atrial fibrillation are addressed, with real-time accelerated imaging presented as a promising solution. The session concludes with practical advice on using proper shimming and frequency adjustment, especially for flow studies and SSFP imaging.

Keywords

cine cardiac MRI

balanced SSFP

ECG gating

cardiac function

ejection fraction

temporal resolution

breath-holding

arrhythmia rejection

real-time imaging