Mri Of Rat’s Heart And T1 Quantification

Abstract

This paper is focused on developing a retrospective gating algorithm for rat heart MRI andT1 quantification. The first goal is to develop an algorithm binning acquired echo signals accordingto the corresponding phases of the cardiac and respiratory cycles. The echo signals are acquired usingan inversion-recovery 2D gradient-echo sequence with radial encoding and golden-angle incrementof the k-space trajectory in the read-phase directions. The next goal is compressed-sensing reconstructionof images. The third goal is fitting a T1-relaxation model to the reconstructed images toobtain quantitative T1 maps.