Search Results - "Giannakopoulos, Ilias I"

Accelerated MRI reconstructions via variational network and feature domain learning by Giannakopoulos, Ilias I., Muckley, Matthew J., Kim, Jesi, Breen, Matthew, Johnson, Patricia M., Lui, Yvonne W., Lattanzi, Riccardo

“…We introduce three architecture modifications to enhance the performance of the end-to-end (E2E) variational network (VarNet) for undersampled MRI…”
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Computational methods for the estimation of ideal current patterns in realistic human models by Giannakopoulos, Ilias I, Georgakis, Ioannis P, Sodickson, Daniel K, Lattanzi, Riccardo

“…To introduce a method for the estimation of the ideal current patterns (ICP) that yield optimal signal-to-noise ratio (SNR) for realistic heterogeneous tissue…”
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Memory Footprint Reduction for the FFT-Based Volume Integral Equation Method via Tensor Decompositions by Giannakopoulos, Ilias I., Litsarev, Mikhail S., Polimeridis, Athanasios G.

“…We present a method of memory footprint reduction for FFT-based, electromagnetic (EM) volume integral equation (VIE) formulations. The arising Green's function…”
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MR electrical properties mapping using vision transformers and canny edge detectors by Giannakopoulos, Ilias I, Carluccio, Giuseppe, Keerthivasan, Mahesh B, Koerzdoerfer, Gregor, Lakshmanan, Karthik, De Moura, Hector L, Cruz Serrallés, José E, Lattanzi, Riccardo

“…We developed a 3D vision transformer-based neural network to reconstruct electrical properties (EP) from magnetic resonance measurements. Our network uses the…”
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A Fast Volume Integral Equation Solver With Linear Basis Functions for the Accurate Computation of EM Fields in MRI by Georgakis, Ioannis P., Giannakopoulos, Ilias I., Litsarev, Mikhail S., Polimeridis, Athanasios G.

“…A stable volume integral equation (VIE) solver based on polarization/magnetization currents is presented, for the accurate and efficient computation of the…”
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MARIE 2.0: A Perturbation Matrix Based Patient-Specific MRI Field Simulator by Guryev, Georgy D., Milshteyn, Eugene, Giannakopoulos, Ilias I., Lattanzi, Riccardo, Wald, Lawrence L., Adalsteinsson, Elfar, White, Jacob K.

“…High static field MR scanners can produce human tissue images of astounding clarity, but rely on high frequency electromagnetic radiation that generates…”
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Noninvasive Estimation of Electrical Properties From Magnetic Resonance Measurements via Global Maxwell Tomography and Match Regularization by Serralles, Jose E. C., Giannakopoulos, Ilias I., Zhang, Bei, Ianniello, Carlotta, Cloos, Martijn A., Polimeridis, Athanasios G., White, Jacob K., Sodickson, Daniel K., Daniel, Luca, Lattanzi, Riccardo

“…Objective: In this paper, we introduce global Maxwell tomography (GMT), a novel volumetric technique that estimates electric conductivity and permittivity by…”
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Compression of Volume-Surface Integral Equation Matrices via Tucker Decomposition for Magnetic Resonance Applications by Giannakopoulos, Ilias I., Guryev, Georgy D., Serralles, Jose E. C., Georgakis, Ioannis P., Daniel, Luca, White, Jacob K., Lattanzi, Riccardo

“…In this work, we propose a method for the compression of the coupling matrix in volume-surface integral equation (VSIE) formulations. VSIE methods are used for…”
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A Hybrid Volume-Surface Integral Equation Method for Rapid Electromagnetic Simulations in MRI by Giannakopoulos, Ilias I., Guryev, Georgy D., Serralles, Jose E. C., Paska, Jan, Zhang, Bei, Daniel, Luca, White, Jacob K., Collins, Christopher M., Lattanzi, Riccardo

“…Objective: We developed a hybrid volume surface integral equation (VSIE) method based on domain decomposition to perform fast and accurate magnetic resonance…”
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Magnetic-Resonance-Based Electrical Property Mapping Using Global Maxwell Tomography With an 8-Channel Head Coil at 7 Tesla: A Simulation Study by Giannakopoulos, Ilias I., Serralles, Jose E. C., Daniel, Luca, Sodickson, Daniel K., Polimeridis, Athanasios G., White, Jacob K., Lattanzi, Riccardo

“…Objective: Global Maxwell Tomography (GMT) is a recently introduced volumetric technique for noninvasive estimation of electrical properties (EP) from magnetic…”
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PIFON-EPT: MR-Based Electrical Property Tomography Using Physics-Informed Fourier Networks by Yu, Xinling, Serralles, Jose E. C., Giannakopoulos, Ilias I., Liu, Ziyue, Daniel, Luca, Lattanzi, Riccardo, Zhang, Zheng

“…We propose Physics-Informed Fourier Networks for Electrical Properties (EP) Tomography (PIFON-EPT), a novel deep learning-based method for EP reconstruction…”
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Global Maxwell Tomography using an 8-channel radiofrequency coil: simulation results for a tissue-mimicking phantom at 7T by Giannakopoulos, Ilias I., C. Serralles, Jose E., Zhang, Bei, Daniel, Luca, White, Jacob K., Lattanzi, Riccardo

“…We simulated a Global Maxwell Tomography experiment for the estimation of electrical properties in a numerical tissue-mimicking phantom using a decoupled 8…”
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A Tensor Train Compression Scheme for Remote Volume-surface Integral Equation Interactions by Giannakopoulos, Ilias I., Guryev, Georgy D., Serralles, Jose E. C., Georgakis, Ioannis P., Daniel, Luca, White, Jacob K., Lattanzi, Riccardo

“…We propose a memory compression scheme for the coupling matrices appearing in volume-surface integral equation formulations. When there is some distance…”
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PIFON-EPT: MR-Based Electrical Property Tomography Using Physics-Informed Fourier Networks by Yu, Xinling, Serrallés, José E. C, Giannakopoulos, Ilias I, Liu, Ziyue, Daniel, Luca, Lattanzi, Riccardo, Zhang, Zheng

“…We propose Physics-Informed Fourier Networks for Electrical Properties (EP) Tomography (PIFON-EPT), a novel deep learning-based method for EP reconstruction…”
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MR-Based Electrical Property Reconstruction Using Physics-Informed Neural Networks by Yu, Xinling, Serrallés, José E. C, Giannakopoulos, Ilias I, Liu, Ziyue, Daniel, Luca, Lattanzi, Riccardo, Zhang, Zheng

“…Electrical properties (EP), namely permittivity and electric conductivity, dictate the interactions between electromagnetic waves and biological tissue. EP can…”
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3D Cross-Tucker Approximation in FFT- Based Volume Integral Equation Methods by Giannakopoulos, Ilias I., Litsarev, Mikhail S., Polimeridis, Athanasios G.

“…We present an algorithm for the compression of the Green function tensors arising from fft-based volume integral equation formulations. The algorithm is based…”
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Memory footprint reduction for the FFT-based volume integral equation method via tensor decompositions by Giannakopoulos, Ilias I, Litsarev, Mikhail S, Polimeridis, Athanasios G

“…We present a method of memory footprint reduction for FFT-based, electromagnetic (EM) volume integral equation (VIE) formulations. The arising Green's function…”
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A hybrid volume-surface integral equation method for rapid electromagnetic simulations in MRI by Giannakopoulos, Ilias I, Guryev, Georgy D, Serrallés, José E. C, Paška, Jan, Zhang, Bei, Daniel, Luca, White, Jacob K, Collins, Christopher M, Lattanzi, Riccardo

“…Objective: We developed a hybrid volume surface integral equation (VSIE) method based on domain decomposition to perform fast and accurate magnetic resonance…”
Get full text

Compression of volume-surface integral equation matrices via Tucker decomposition for magnetic resonance applications by Giannakopoulos, Ilias I, Guryev, Georgy D, Serralles, Jose E. C, Georgakis, Ioannis P, Daniel, Luca, White, Jacob K, Lattanzi, Riccardo

“…In this work, we propose a method for the compression of the coupling matrix in volume\hyp surface integral equation (VSIE) formulations. VSIE methods are used…”
Get full text

Magnetic-resonance-based electrical property mapping using Global Maxwell Tomography with an 8-channel head coil at 7 Tesla: a simulation study by Giannakopoulos, Ilias I, Serrallés, José E. C, Daniel, Luca, Sodickson, Daniel K, Polimeridis, Athanasios G, White, Jacob K, Lattanzi, Riccardo

“…Objective: Global Maxwell Tomography (GMT) is a recently introduced volumetric technique for noninvasive estimation of electrical properties (EP) from magnetic…”
Get full text