The Role of Improved Motion-Sensitized Driven Equilibrium Blood Suppression and Fat Saturation on T Relaxation Time, Using GraSE Sequence in Cardiac Magnetic Resonance Imaging.

Background: T mapping is a valuable technique in cardiac MR imaging that offers insights into the microstructural characteristics of myocardial tissue. However, it was shown that myocardial T relaxation times (T) measured vary significantly depending on sequence, sequence parameters, and field strength.

Purpose: To assess T variability and image quality in cardiac T maps using four variants of the gradient-spin echo (GraSE) sequence, having different methods of blood signal suppression (double inversion recovery (DIR) and improved motion-sensitized driven equilibrium (iMSDE) and with and without the addition of fat saturation (FS).