4D Flow CMR Hands-On Course-Breakout Rooms

Video Transcription

Video Summary

The discussion focused on practical 4D flow MRI use. Speakers agreed contrast is helpful for signal-to-noise and faster scans, but not required for accurate flow quantification; non-contrast 4D flow was described as feasible and reliable. Gadolinium-based agents were said to work similarly across sites, while ferumoxytol can improve angiographic visualization, vessel segmentation, and venous/portal imaging, especially in complex congenital cases and small children. They clarified that flow measurements come from the true velocity field, while streamlines are only a snapshot visualization. Phase unwrapping is typically handled in post-processing software, not on the scanner. The group also discussed software capabilities, retrospective gating availability, and clinical workflow, including sharing cases and using 4D flow routinely in congenital heart disease and some abdominal shunt cases.

Keywords

4D flow MRI

non-contrast flow quantification

gadolinium contrast

ferumoxytol angiography

phase unwrapping

congenital heart disease