The Use of Biofeedback with MCLAWS to Guide Respiration and Provide Inspiratory and Expiratory Images from a Single Navigator-Gated 3D Coronary MRA Acquisition.

Permi Jhooti¹, Jennifer Keegan², Klaus Scheffler¹, David Firmin²

The mCLAWS technique produces whole heart images in the fastest possible time for a given respiratory pattern and gating window, as well as image datasets at end expiration and end inspiration. The end inspiratory images are generally poorer quality than the end expiratory images because the end inspiratory position is usually more variable and the end inspiratory pause shorter. We have implemented a respiratory biofeedback game with a multi-navigator mCLAWS technique to regularise the subjects breathing patterns and to enable the acquisition of high quality end inspiratory and end expiratory images from a single whole heart acquisition.