Combination of Motion Adapted Gating with Non-Rigid Motion Correction for Free-Breathing MRI

Yuji Iwadate¹, Yoshihiro Tomoda², Yoshikazu Ikezaki², Tetsuji Tsukamoto¹

The motion adapted gating (MAG) approach accelerates respiratory gating but still requires considerably longer scan time compared to a single breath-hold scan. In this work, we combined the non-rigid motion correction technique with the MAG approach to reduce scan time to the level comparable to breath-hold. A volunteer study showed that the scan time was less than 1.1-fold longer than non-gating scan and motion artifacts remaining with the MAG were reduced by non-rigid motion correction. This technique can be applied to various abdominal applications such as free-breathing dynamic contrast enhanced imaging.