Myocardial T2 Mapping with Respiratory Navigator & Non-Rigid Registration: Comparison of Motion Compensation Techniques

Shivraman Giri¹, Saurabh Shah², Hui Xue³, Jens Guehring³, Sven Zuehlsdorff², Yiu-Cho Chung², Subha V. Raman¹, Orlando P. Simonetti¹

In this work, we propose a myocardial T2 mapping sequence with two motion-compensation schemes: respiratory navigator and non-rigid registration. Their combined application provides complementary motion-compensation, with navigator providing reproducible positioning of the heart in all directions, and registration correcting for any residual in-plane motion. Results show a significant reduction in motion-induced T2 variability in myocardial T2 maps. The proposed sequence permits reliable T2 mapping without subject breath-hold and may enable 3D T2 maps of the myocardium in future.