Focus Session 5: MR Techniques and Methods: Rapid Image Acquisition and Reconstruction (2019)-3D Cardiac Magnetic Resonance Fingerprinting

3D Cardiac Magnetic Resonance Fingerprinting

Video Transcription

Video Summary

The talk describes 3D cardiac MRI fingerprinting to measure T1 and T2 simultaneously with improved heart coverage. It uses variable flip angles, T1/T2 preparation pulses, and undersampled 3D spiral or stack-of-stars data reconstructed with low-rank MRF methods. Compared with 2D fingerprinting, 3D aims to reduce through-plane motion issues and improve SNR. Experiments in two healthy volunteers showed good breath-hold image quality, but free-breathing scans suffered from blurring and ghosting. A preliminary respiratory motion-correction approach using bellows-based translational correction improved sharpness, suggesting free-breathing 3D cardiac fingerprinting is feasible but still needs more advanced motion models.

Keywords

3D cardiac MRI fingerprinting

T1 and T2 mapping

low-rank MRF reconstruction

respiratory motion correction

heart coverage