Stochastic optimization of three‐dimensional non‐Cartesian sampling trajectory

G Wang, JF Nielsen, JA Fessler… - Magnetic Resonance in …, 2023 - Wiley Online Library
Purpose Optimizing three‐dimensional (3D) k‐space sampling trajectories is important for
efficient MRI yet presents a challenging computational problem. This work proposes a …

Gastrointestinal 4D MRI with respiratory motion correction

A Johansson, JM Balter, Y Cao - Medical physics, 2021 - Wiley Online Library
Purpose Gastrointestinal motion patterns such as peristalsis and segmental contractions can
alter the shape and position of the stomach and intestines with respect to other irradiated …

Real time volumetric MRI for 3D motion tracking via geometry‐informed deep learning

L Liu, L Shen, A Johansson, JM Balter, Y Cao… - Medical …, 2022 - Wiley Online Library
Purpose To develop a geometry‐informed deep learning framework for volumetric MRI with
sub‐second acquisition time in support of 3D motion tracking, which is highly desirable for …

Abdominal synthetic CT generation from MR Dixon images using a U-net trained with 'semi-synthetic'CT data

L Liu, A Johansson, Y Cao, J Dow… - Physics in Medicine …, 2020 - iopscience.iop.org
Magnetic resonance imaging (MRI) is gaining popularity in guiding radiation treatment for
intrahepatic cancers due to its superior soft tissue contrast and potential of monitoring …

Stochastic optimization of 3D non-cartesian sampling trajectory (SNOPY)

G Wang, JF Nielsen, JA Fessler, DC Noll - arXiv preprint arXiv:2209.11030, 2022 - arxiv.org
Optimizing 3D k-space sampling trajectories for efficient MRI is important yet challenging.
This work proposes a generalized framework for optimizing 3D non-Cartesian sampling …

Rethinking medical image reconstruction via shape prior, going deeper and faster: Deep joint indirect registration and reconstruction

J Liu, AI Aviles-Rivero, H Ji, CB Schönlieb - Medical Image Analysis, 2021 - Elsevier
Indirect image registration is a promising technique to improve image reconstruction quality
by providing a shape prior for the reconstruction task. In this paper, we propose a novel …

3D nonrigid motion correction for quantitative assessment of hepatic lesions in DCE‐MRI

M Ippoliti, M Lukas, W Brenner… - Magnetic resonance …, 2019 - Wiley Online Library
Purpose To provide nonrigid respiratory motion‐corrected DCE‐MRI images with isotropic
resolution of 1.5 mm, full coverage of abdomen, and covering the entire uptake curve with a …

Bulk motion‐compensated DCE‐MRI for functional imaging of kidneys in newborns

J Coll‐Font, O Afacan, JS Chow, RS Lee… - Journal of Magnetic …, 2020 - Wiley Online Library
Background Evaluation of kidney function in newborns with hydronephrosis is important for
clinical decisions. Dynamic contrast‐enhanced (DCE) MRI can provide the necessary …

Dynamic imaging using motion-compensated smoothness regularization on manifolds (MoCo-SToRM)

Q Zou, LA Torres, SB Fain, NS Higano… - Physics in medicine …, 2022 - iopscience.iop.org
Objective. We introduce an unsupervised motion-compensated reconstruction scheme for
high-resolution free-breathing pulmonary magnetic resonance imaging. Approach. We …

Modeling intra-fractional abdominal configuration changes using breathing motion-corrected radial MRI

L Liu, A Johansson, Y Cao, R Kashani… - Physics in Medicine …, 2021 - iopscience.iop.org
Abdominal organ motions introduce geometric uncertainties to gastrointestinal radiotherapy.
This study investigated slow drifting motion induced by changes of internal anatomic organ …