User profiles for N.R. Zwart
Nick ZwartAssistant Research Professor, Barrow Neurological Institute Verified email at dignityhealth.org Cited by 981 |
A new design and rationale for 3D orthogonally oversampled k‐space trajectories
A novel center‐out 3D trajectory for sampling magnetic resonance data is presented. The
trajectory set is based on a single Fermat spiral waveform, which is substantially …
trajectory set is based on a single Fermat spiral waveform, which is substantially …
Efficient sample density estimation by combining gridding and an optimized kernel
The reconstruction of non‐Cartesian k‐space trajectories often requires the estimation of
nonuniform sampling density. Particularly for 3D, this calculation can be computationally …
nonuniform sampling density. Particularly for 3D, this calculation can be computationally …
ISMRM Raw data format: A proposed standard for MRI raw datasets
Purpose This work proposes the ISMRM Raw Data format as a common MR raw data format,
which promotes algorithm and data sharing. Methods A file format consisting of a flexible …
which promotes algorithm and data sharing. Methods A file format consisting of a flexible …
Spiral trajectory design: a flexible numerical algorithm and base analytical equations
Purpose Spiral‐based trajectories for magnetic resonance imaging can be advantageous,
but are often cumbersome to design or create. This work presents a flexible numerical …
but are often cumbersome to design or create. This work presents a flexible numerical …
Graphical programming interface: a development environment for MRI methods
Purpose To introduce a multiplatform, Python language‐based, development environment
called graphical programming interface for prototyping MRI techniques. Methods The …
called graphical programming interface for prototyping MRI techniques. Methods The …
Joint water–fat separation and deblurring for spiral imaging
Purpose Most previous approaches to spiral Dixon water–fat imaging perform the water–fat
separation and deblurring sequentially based on the assumption that the phase …
separation and deblurring sequentially based on the assumption that the phase …
Revised motion estimation algorithm for PROPELLER MRI
Purpose To introduce a new algorithm for estimating data shifts (used for both rotation and
translation estimates) for motion‐corrected PROPELLER MRI. The method estimates shifts for …
translation estimates) for motion‐corrected PROPELLER MRI. The method estimates shifts for …
Multidirectional high‐moment encoding in phase contrast MRI
The use of phase contrast MRI to measure vascular flow provides a unique method for
acquiring quantitative estimates of flow as well as morphological imaging. The quantitative …
acquiring quantitative estimates of flow as well as morphological imaging. The quantitative …
Arterial spin labeled perfusion imaging using three‐dimensional turbo spin echo with a distributed spiral‐in/out trajectory
Purpose The three‐dimensional (3D) spiral turbo spin echo (TSE) sequence is one of the
preferred readout methods for arterial spin labeled (ASL) perfusion imaging. Conventional …
preferred readout methods for arterial spin labeled (ASL) perfusion imaging. Conventional …
Analytical three‐point Dixon method: With applications for spiral water–fat imaging
Purpose The goal of this work is to present a new three‐point analytical approach with flexible
even or uneven echo increments for water–fat separation and to evaluate its feasibility …
even or uneven echo increments for water–fat separation and to evaluate its feasibility …