26 citations · 46 across the 5 of their papers we have counts for
5 papers · 1 filter
Least Squares Optimal Density Compensation for the Gridding Non-uniform Discrete Fourier Transform
Nicholas Dwork, Daniel O'Connor, Ethan M. I. Johnson +4
The Gridding algorithm has shown great utility for reconstructing images from non-uniformly spaced samples in the Fourier domain in several imaging modalities. Due to the non-unifo…
multiMap: A Gradient Spoiled Sequence for Simultaneously Measuring B1+, B0, T1/M0, T2, T2*, and Fat Fraction of a Slice
Nicholas Dwork, Adam B. Kerr, Ethan M. I. Johnson +5
We propose multiMap, a single scan that can generate several quantitative maps simultaneously. The sequence acquires multiple images in a time-efficient manner, which can be modele…
Multi-coil Magnetic Resonance Imaging with Compressed Sensing Using Physically Motivated Regularization
Nicholas Dwork, Ethan M. I. Johnson, Daniel O'Connor +5
With the advent of multi-coil imaging and compressed sensing, a number of model based reconstruction algorithms have been created. They incorporate a multitude of different regular…
Fast Variable Density Poisson-Disc Sample Generation with Directional Variation
Nicholas Dwork, Corey A. Baron, Ethan M. I. Johnson +3
We present a fast method for generating random samples according to a variable density Poisson-disc distribution. A minimum threshold distance is used to create a background grid a…
Utilizing the Wavelet Transform's Structure in Compressed Sensing
Nicholas Dwork, Daniel O'Connor, Corey A. Baron +4
Compressed sensing has empowered quality image reconstruction with fewer data samples than previously though possible. These techniques rely on a sparsifying linear transformation.…