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Grant Gullberg, PhD
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Publications
Grant Gullberg, PhD's Publications
Physical phantom validation of clustering-initiated factorization in dynamic PET.
A Technique to Quantify Very Low Activities in Regions of Interest With a Collimatorless Detector.
A generalization of the maximum likelihood expectation maximization (MLEM) method: Masked-MLEM.
Simulation studies of a full-ring, CZT SPECT system for whole-body imaging of 99m Tc and 177 Lu.
Accuracy and Reproducibility of Myocardial Blood Flow Quantification by Single Photon Emission Computed Tomography Imaging in Patients With Known or Suspected Coronary Artery Disease.
An Analytical Algorithm for Tensor Tomography From Projections Acquired About Three Axes.
Compton and proximity imaging of 225Ac in vivo with a CZT gamma camera: a proof of principle with simulations.
Monte Carlo Simulation and Reconstruction: Assessment of Myocardial Perfusion Imaging of Tracer Dynamics With Cardiac Motion Due to Deformation and Respiration Using Gamma Camera With Continuous Acquisition.
Data Management and Network Architecture Effect on Performance Variability in Direct Attenuation Correction via Deep Learning for Cardiac SPECT: A Feasibility Study.
Direct Attenuation Correction Using Deep Learning for Cardiac SPECT: A Feasibility Study.
Direct Image-Based Attenuation Correction using Conditional Generative Adversarial Network for SPECT Myocardial Perfusion Imaging.
Evaluation of a variable-aperture full-ring SPECT system using large-area pixelated CZT modules: A simulation study for brain SPECT applications.
Novel Methodology for Measuring Regional Myocardial Efficiency.
Tomography of dark-field scatter including single-exposure Moiré fringe analysis with X-ray biprism interferometry-A simulation study.
X-ray bi-prism interferometry-A design study of proposed novel hardware.
Assessment of late-term progression of cardiac allograft vasculopathy in patients with orthotopic heart transplantation using quantitative cardiac 82Rb PET.
CT-less Direct Correction of Attenuation and Scatter in the Image Space Using Deep Learning for Whole-Body FDG PET: Potential Benefits and Pitfalls.
Transmural Remodeling of Cardiac Microstructure in Aged Spontaneously Hypertensive Rats by Diffusion Tensor MRI.
Joint correction of attenuation and scatter in image space using deep convolutional neural networks for dedicated brain 18F-FDG PET.
Multiresolution spatiotemporal mechanical model of the heart as a prior to constrain the solution for 4D models of the heart.
Comparison of sparse domain approaches for 4D SPECT dynamic image reconstruction.
Dynamic cardiac PET imaging: Technological improvements advancing future cardiac health.
PET imaging of glucose and fatty acid metabolism for NAFLD patients.
Tensor Tomography of Dark Field Scatter using X-ray Interferometry with Bi-prisms.
A combined static-dynamic single-dose imaging protocol to compare quantitative dynamic SPECT with static conventional SPECT.
Design of a short nonuniform acquisition protocol for quantitative analysis in dynamic cardiac SPECT imaging - a retrospective 123 I-MIBG animal study.
Longitudinal Evaluation of Myocardial Fatty Acid and Glucose Metabolism in Fasted and Nonfasted Spontaneously Hypertensive Rats Using MicroPET/CT.
Noninvasive PET quantitative myocardial blood flow with regadenoson for assessing cardiac allograft vasculopathy in orthotopic heart transplantation patients.
Sparse domain approaches in dynamic SPECT imaging with high-performance computing.
On the averaging of cardiac diffusion tensor MRI data: the effect of distance function selection.
Quantitative analysis of hypertrophic myocardium using diffusion tensor magnetic resonance imaging.
Value of Formalin Fixation for the Prolonged Preservation of Rodent Myocardial Microanatomical Organization: Evidence by MR Diffusion Tensor Imaging.
Clustering-initiated factor analysis application for tissue classification in dynamic brain positron emission tomography.
Image reconstruction in higher dimensions: myocardial perfusion imaging of tracer dynamics with cardiac motion due to deformation and respiration.
Longitudinal Evaluation of Sympathetic Nervous System and Perfusion in Normal and Spontaneously Hypertensive Rat Hearts with Dynamic Single-Photon Emission Computed Tomography.
Measurement of absolute myocardial blood flow in humans using dynamic cardiac SPECT and 99mTc-tetrofosmin: Method and validation.
The direct incorporation of perfusion defect information to define ischemia and infarction in a finite element model of the left ventricle.
Handling Big Data in Medical Imaging: Iterative Reconstruction with Large-Scale Automated Parallel Computation.
Improved trabecular bone structure of 20-month-old male spontaneously hypertensive rats.
Multipinhole collimator with 20 apertures for a brain SPECT application.
Preclinical and Translational PET/MR Imaging.
Quantitative Signature of Coronary Steal in a Patient with Occluded Coronary Arteries Supported by Collateral Circulation Using Dynamic SPECT.
Reconstruction of 4-D dynamic SPECT images from inconsistent projections using a Spline initialized FADS algorithm (SIFADS).
A Comparison of Hyperelastic Warping of PET Images with Tagged MRI for the Analysis of Cardiac Deformation.
A detector response function design in pinhole SPECT including geometrical calibration.
Design and performance evaluation of a 20-aperture multipinhole collimator for myocardial perfusion imaging applications.
Fast direct estimation of the blood input function and myocardial time activity curve from dynamic SPECT projections via reduction in spatial and temporal dimensions.
Left ventricular finite element model bounded by a systemic circulation model.
Longitudinal evaluation of left ventricular substrate metabolism, perfusion, and dysfunction in the spontaneously hypertensive rat model of hypertrophy using small-animal PET/CT imaging.
Myocardial blood flow measurement with a conventional dual-head SPECT/CT with spatiotemporal iterative reconstructions - a clinical feasibility study.
On the bias of finite-view interior tomography using piecewise-constant and non-negativity constraints.
Practical implementation of tetrahedral mesh reconstruction in emission tomography.
Fourier domain closed-form formulas for estimation of kinetic parameters in reversible multi-compartment models.
Imaging and modeling of flow in porous media using clinical nuclear emission tomography systems and computational fluid dynamics.
Kinetic parameter estimation using a closed-form expression via integration by parts.
Null-space function estimation for the interior problem.
Development of a model of the coronary arterial tree for the 4D XCAT phantom.
Investigation of dynamic SPECT measurements of the arterial input function in human subjects using simulation, phantom and human studies.
MR-based keyhole SPECT for small animal imaging.
Closed-form kinetic parameter estimation solution to the truncated data problem.
Dynamic single photon emission computed tomography--basic principles and cardiac applications.
Incorporation of a left ventricle finite element model defining infarction into the XCAT imaging phantom.
Longitudinal Evaluation of Fatty Acid Metabolism in Normal and Spontaneously Hypertensive Rat Hearts with Dynamic MicroSPECT Imaging.
Realistic Simulation of Regional Myocardial Perfusion Defects for Cardiac SPECT Studies.
SPECT region of interest reconstruction with truncated transmission and emission data.
Exact emission SPECT reconstruction with truncated transmission data.
Exact iterative reconstruction for the interior problem.
Reconstructing uniformly attenuated rotating slant-hole SPECT projection data using the DBH method.
Reconstruction from uniformly attenuated SPECT projection data using the DBH method.
Assessment of the sources of error affecting the quantitative accuracy of SPECT imaging in small animals.
Measuring regional changes in the diastolic deformation of the left ventricle of SHR rats using microPET technology and hyperelastic warping.
A Fourier reconstruction algorithm with constant attenuation compensation using 180 degrees acquisition data for SPECT.
Reconstruction and visualization of fiber and laminar structure in the normal human heart from ex vivo diffusion tensor magnetic resonance imaging (DTMRI) data.
Image reconstruction.
Method of generating multiple sets of experimental phantom data.
Normal and pathological NCAT image and phantom data based on physiologically realistic left ventricle finite-element models.
Tomographic reconstruction using an adaptive tetrahedral mesh defined by a point cloud.
An FDK-like cone-beam SPECT reconstruction algorithm for non-uniform attenuated projections acquired using a circular trajectory.
Analytical fan-beam and cone-beam reconstruction algorithms with uniform attenuation correction for SPECT.
Exact fan-beam and 4pi-acquisition cone-beam SPECT algorithms with uniform attenuation correction.
Measurement of strain in the left ventricle during diastole with cine-MRI and deformable image registration.
Cone-beam and fan-beam image reconstruction algorithms based on spherical and circular harmonics.
MRI diffusion tensor reconstruction with PROPELLER data acquisition.
Calculation of the left ventricular ejection fraction without edge detection: application to small hearts.
Correction for ambiguous solutions in factor analysis using a penalized least squares objective.
Diffusion tensor MR imaging of principal directions: a tensor tomography approach.
Effects of temporal modelling on the statistical uncertainty of spatiotemporal distributions estimated directly from dynamic SPECT projections.
Removal of liver activity contamination in teboroxime dynamic cardiac SPECT imaging with the use of factor analysis.
Strain measurement in coronary arteries using intravascular ultrasound and deformable images.
4D maximum a posteriori reconstruction in dynamic SPECT using a compartmental model-based prior.
Comparison of Static and Dynamic Cardiac Perfusion Thallium-201 SPECT.
Cone-beam image reconstruction using spherical harmonics.
Efficient cardiac diffusion tensor MRI by three-dimensional reconstruction of solenoidal tensor fields.
Estimation of coronary flow reserve: can SPECT compete with other modalities?
Mortality, morbidity, and assessment of fracture risk in male osteoporosis.
Reconstruction of dynamic renal tomographic data acquired by slow rotation.
A slice-by-slice blurring model and kernel evaluation using the Klein-Nishina formula for 3D scatter compensation in parallel and converging beam SPECT.
A three-dimensional ray-driven attenuation, scatter and geometric response correction technique for SPECT in inhomogeneous media.
Direct least-squares estimation of spatiotemporal distributions from dynamic SPECT projections using a spatial segmentation and temporal B-splines.
Factor analysis with a priori knowledge--application in dynamic cardiac SPECT.
SPECT Imaging of Teboroxime during Myocardial Blood Flow Changes.
Static Versus Dynamic Teboroxime Myocardial Perfusion SPECT in Canines.
Unmatched projector/backprojector pairs in an iterative reconstruction algorithm.
A projector/backprojector with slice-to-slice blurring for efficient three-dimensional scatter modeling.
Analytical propagation of errors in dynamic SPECT: estimators, degrading factors, bias and noise.
Blind estimation of compartmental model parameters.
Application of spherical harmonics to image reconstruction for the Compton camera.
Effect of truncated projections on defect detection in attenuation-compensated fanbeam cardiac SPECT.
Improved estimation of the detector response function for converging beam collimators.
Innovative design concepts for transmission CT in attenuation-corrected SPECT imaging.
Iterative and analytical reconstruction algorithms for varying-focal-length cone-beam projections.
Iterative reconstruction of fluorine-18 SPECT using geometric point response correction.
Kinetic parameter estimation from SPECT cone-beam projection measurements.
No impaired cognitive function in treated patients with mild-moderate hypertension compared to normotensive controls.
Projection space image reconstruction using strip functions to calculate pixels more "natural" for modeling the geometric response of the SPECT collimator.
Quantitative myocardial perfusion SPECT.
An investigation into the effect of input function shape and image acquisition interval on estimates of washin for dynamic cardiac SPECT.
Implementation of a model-based nonuniform scatter correction scheme for SPECT.
Reduction of geometric and intensity distortions in echo-planar imaging using a multireference scan.
Toward accurate attenuation correction in SPECT without transmission measurements.
Experimental verification of technetium 99m-labeled teboroxime kinetic parameters in the myocardium with dynamic single-photon emission computed tomography: reproducibility, correlation to flow, and susceptibility to extravascular contamination.
A transmission-map-based scatter correction technique for SPECT in inhomogeneous media.
An investigation of the effect of finite system resolution and photon noise on the bias and precision of dynamic cardiac SPECT parameters.
Magnetic resonance imaging verification of a multi-compartment perfusion model for a chromatography gel phantom.
Reduction of phase error ghosting artifacts in thin slice fast spin-echo imaging.
A backprojection filtering algorithm for a spatially varying focal length collimator.
A cone beam SPECT reconstruction algorithm with a displaced center of rotation.
A simulation of emission and transmission noise propagation in cardiac SPECT imaging with nonuniform attenuation correction.
Application of convergent-beam collimation and simultaneous transmission emission tomography to cardiac single-photon emission computed tomography.
Implementation of Tuy's cone-beam inversion formula.
Kinetic modeling of teboroxime using dynamic SPECT imaging of a canine model.
Tuning and matching networks for MR imaging and spectroscopy.
Evaluation of cardiac cone-beam single photon emission computed tomography using observer performance experiments and receiver operating characteristic analysis.
Fan-beam reconstruction algorithm for a spatially varying focal length collimator.
The use of computer-assisted diagnosis in cardiac perfusion nuclear medicine studies: a review (Part 2).
The use of computer-assisted diagnosis in cardiac perfusion nuclear medicine studies: a review (Part 3)
A cone-beam filtered backprojection reconstruction algorithm for cardiac single photon emission computed tomography.
A cone-beam tomography algorithm for orthogonal circle-and-line orbit.
Review of convergent beam tomography in single photon emission computed tomography.
The use of computer-assisted diagnosis in cardiac-perfusion nuclear medicine studies: a review.
An MRI perfusion model incorporating nonequilibrium exchange between vascular and extravascular compartments.
Cone beam tomography of the heart using single-photon emission-computed tomography.
Single photon emission computed tomography of the heart using cone beam geometry and noncircular detector rotation.
SPECT myocardial perfusion imaging update.
Estimation of geometrical parameters and collimator evaluation for cone beam tomography.
Signal-to-noise efficiency in magnetic resonance imaging.
The geometric transfer function for cone and fan beam collimators.
Correction of nonuniform attenuation in cardiac SPECT imaging.
Flow-induced phase effects and compensation technique for slice-selective pulses.
A mathematical model for signal from spins flowing during the application of spin echo pulse sequences.
Convolutional reconstruction algorithm for fan beam concave and convex circular detectors.
Noise characteristics for cone beam collimators: a comparison with parallel hole collimator.
Reconstruction for fan beam with an angular-dependent displaced center-of-rotation.
An analytical approach to quantify uniformity artifacts for circular and noncircular detector motion in single photon emission computed tomography imaging.
Gibbs artifact removal in magnetic resonance imaging.
MR vascular imaging with a fast gradient refocusing pulse sequence and reformatted images from transaxial sections.
The solution of Bloch equations for flowing spins during a selective pulse using a finite difference method.
Design and clinical utility of a fan beam collimator for SPECT imaging of the head.
Reconstruction Algorithm for Fan Beam with a Displaced Center-of-Rotation.
SPECT liver imaging using an iterative attenuation correction algorithm and an external flood source.
Time-of-flight MR flow imaging: selective saturation recovery with gradient refocusing.
A count-based algorithm for attenuation-corrected volume determination using data from an external flood source.
An attenuated projector-backprojector for iterative SPECT reconstruction.
Regional distribution of myocardial blood flow measured by single-photon emission tomography: comparison with in vitro counting.
The use of filtering methods to compensate for constant attenuation in single-photon emission computed tomography.
Quantitative potentials of dynamic emission computed tomography.
Emission computer assisted tomography with single-photon and positron annihilation photon emitters.
Three dimensional imaging of the myocardium with radionuclides.
Letter: Three-dimensional reconstruction of isotope distributions.
