Improving cardiac cine MRI on 3T using 2D k-t accelerated auto-calibrating parallel imaging

Peng Lai,Anja Brau

doi:10.1186/1532-429x-16-s1-w3

Abstract

Background Recently, 3D cine has gained attention due to its capability for single breath-hold volumetric measurement [1]. Nonetheless, conventional 2D cine maintains two intrinsic advantages, namely, its superior blood-myocardium contrast owing to blood in-flow effects and reduced SSFP banding artifacts with more localized slice-by-slice shimming. These advantages are more prominent at high field. This work intends to optimize a k-t acceleration method, kat ARC [2], for 2D cine and preliminarily investigate its performance vs. 3D cine at 3T.

Highlights

3D cine has gained attention due to its capability for single breath-hold volumetric measurement [1]
Variable-Density k-t Sampling (VDkt): As shown in Figure 1, the entire k-t space is divided into sub-bands based on distance from central k-space and these subbands are sampled using time-shifted acquisition with linearly increasing acceleration from center to outer bands
Static Tissue Removal (STR): Signals of static tissue voxels can be estimated from the original undersampled k-t data [3]

Summary

Introduction

3D cine has gained attention due to its capability for single breath-hold volumetric measurement [1]. Conventional 2D cine maintains two intrinsic advantages, namely, its superior blood-myocardium contrast owing to blood in-flow effects and reduced SSFP banding artifacts with more localized slice-by-slice shimming. These advantages are more prominent at high field. This work intends to optimize a k-t acceleration method, kat ARC [2], for 2D cine and preliminarily investigate its performance vs 3D cine at 3T

Methods

Results

Conclusion