Non‐Cartesian slice‐GRAPPA and slice‐SPIRiT reconstruction methods for multiband spiral cardiac MRI

Real time cardiac MRI: spline-based spatio-temporal reconstruction of spiral data

We propose a novel reconstruction method using a spline-based image model in both spatial and temporal dimensions that takes the advantage of the precise timing of each k-space sample to reconstruct image series at high time frames, independently from the original sampling rate of data and avoiding the temporal blurring that can affect other reconstruction methods like sliding window. While MRI...

Iterative Reconstruction Methods for Non-cartesian Mri

For magnetic resonance imaging (MRI) with Cartesian k-space sampling, a simple inverse FFT usually suffices for image reconstruction. More sophisticated image reconstruction methods are needed for non-Cartesian k-space acquisitions. Regularized least-squares methods for image reconstruction involve minimizing a cost function consisting of a least-squares data fit term plus a regularizing roughn...

Spiral MRI Reconstruction Using Least Square Quantization Table

Recently, the authors introduced least squares quantization table (LSQT) method to accelerate the direct Fourier transform to reconstruct magnetic resonance images acquired using a spiral trajectory. In this paper, we will discuss the LSQT further in its adaptability, reusability and choice of the number of groups. The experimental results show that the LSQT method has better adaptability for t...

Compressed Sensing Reconstruction Improves Variable Density Spiral Functional MRI

Introduction: Recent approaches to spiral imaging using variable density (VD) trajectories [1,2] have demonstrated the ability to decrease the data acquisition window for an equivalent image matrix size, with a subsequently improved fMRI sensitivity attributed to a higher time course sampling rate. In separate research, the application of Compressed Sensing (CS) reconstruction algorithms to spa...

Methods for MRI RF Pulse Design and Image Reconstruction