Improved Method for Retrograde Gating for Cardiac Magnetic Resonance Imaging

Sohae Chung¹, Pippa Storey¹, Leon Axel¹

In the conventional retrospective gating method, the acquired data are typically interpolated onto equivalent equally spaced intervals by linearly scaling the data to fit into the average cycle. However, in the presence of R-R variation which largely reflects differences in the duration of diastasis, the usual linear time scaling used in conventional retrospective gating method will result in some temporal blurring and degradation of the image quality. In this work, we proposed a 'retrograde gating' method, which allows for retrospectively including the late diastolic events preceding each QRS detection in a fixed relation with the interval following it.