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System and Method for Streak Reduction in MRI
This technology is a new technique for Magnetic Resonance Imaging (MRI) reconstruction that reduces or eliminates streaking in radial MRI images without significant signal loss. It can be used on its own or working together with existing streak reduction techniques, such as iterative reconstruction.
Background:
Radial sampling (as opposed to Cartesian...
Published: 4/3/2023
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Inventor(s): Ali Bilgin, Zhiyang Fu, Maria Altbach
Keywords(s):
Category(s): Technology Classifications > Imaging & Optics > Medical Imaging, Technology Classifications > Life Sciences > Diagnostics
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Radial Streaking Artifact Reduction Using Phased Array Beamforming
This invention is a method and software for mitigating the streaking artifact in radial magnetic resonance imaging (MRI). After being tested on MRI scanners and compared to current coil based methods, this new method, known as B-STAR, utilizes phased array beamforming and reduces streak artifacts without any noticeable loss in signal levels.
Background:...
Published: 4/3/2023
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Inventor(s): Sagar Mandava, Maria Altbach, Ali Bilgin, Diego Martin, Mahesh Keerthivasan
Keywords(s):
Category(s): Technology Classifications > Software & Information Technology > Health IT, Technology Classifications > Imaging & Optics > Medical Imaging
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Lossless Image Compression Using Causal Block Matching and 3D Collaborative Filtering
This technology is a novel predictor that leverages non-local structure similarities to de-noise and de-blur images by extending block-matching and 3D collaborative filtering to image prediction and compression.
Background:
Over the last few decades, substantial progress has been made in estimation methods that are adapted to the local structure...
Published: 6/26/2023
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Inventor(s): Ali Bilgin, Robert Crandall
Keywords(s):
Category(s): Technology Classifications > Software & Information Technology
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Distributed Feedback Fiber Laser Pumped by Multimode Diode Lasers
Researchers at the University of Arizona College of Optical Sciences and Canada's Carleton University recently succeeded in fabricating high reflectivity (>99%) Fiber Bragg Gratings (FBGs) into phosphate glass fibers using UV light and a phase mask technique. With this new manufacturing technique, fiber lasers can be created as single monolithic...
Published: 4/3/2023
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Inventor(s): Nasser Peyghambarian, Axel Schülzgen, Li Li, Jacques Albert
Keywords(s):
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Lasers & Other Sources
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All-Fiber Multicore Fiber Laser Devices
Researchers at the University of Arizona have developed a compact, power-scalable, alignment-free fiber laser that takes a new approach to stabilizing phase-locked operation of multi-core fiber lasers by completely removing all free space optical components. This high-brightness, all-fiber laser package uses passive optical fiber spliced at both ends...
Published: 4/3/2023
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Inventor(s): Nasser Peyghambarian, Axel Schülzgen, Li Li
Keywords(s):
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Fiber Optics, Technology Classifications > Imaging & Optics > Lasers & Other Sources
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Grid-Based Robust Field Map Estimation without the Noise-Bandwidth Trade-Off
The present invention is a new MRI acquisition that does not suffer from the noise-bandwidth trade-off commonly seen in current MRI measurement devices. This trade-off measuring seen in large range of inhomogeneity values will suffer from high levels of noise resulting in unreliable estimates of measurement. Accurate results are only guaranteed over...
Published: 4/3/2023
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Inventor(s): Ali Bilgin, Joseph Dagher
Keywords(s): magnetic field detection, magnetic resonance imaging
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Medical Imaging
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T2 Relaxometry with Indirect Echo Compensation from Highly Undersampled Data
This invention enables accurate T2 estimation from highly undersampled data with indirect echo contamination. The technique is based on an iterative algorithm where the signalmodel (which is derived from a model that takes into account the presence of indirect echoes) is linearized using principal component analysis. The goal of the proposed SlicE Resolved...
Published: 6/26/2023
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Inventor(s): Maria Altbach, Ali Bilgin, Chuan Huang
Keywords(s): indirect echo, MR parameter estimation, stimulated echo, T2 mapping, undersampled data
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Medical Imaging
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Tissue Characterization with Partial Volume Correction Using Highly Undersampled Data and a Joint Fitting Algorithm
This technology provides techniques to a fast and accurate parameter estimation in the presence of partial volume from MRI data acquired. A specific technique application for liver lesion imaging is provided in this invention. The inventors employ Joint Bi-Exponential Fitting (JBF) algorithm in context of T2 estimation for small structure determination...
Published: 6/26/2023
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Inventor(s): Maria Altbach, Ali Bilgin, Chuan Huang, Christian Graff
Keywords(s): joint estimation, parameter estimation, partial volume correction
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Medical Imaging
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Method for Exploiting Structure in Sparse Domain for Magnetic Resonance Image Reconstruction
This technology presents an improved Compressed Sensing (CS) method. This method analyzes every iteration in the CS reconstruction process and refines the solution. This process gives statistically more reliable solutions and provides for better reconstructed image quality with reduced signal to noise ratios. This method improves reconstruction times...
Published: 6/26/2023
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Inventor(s): Ali Bilgin, Yookyung Kim, Mariappan Nadar
Keywords(s):
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Medical Imaging
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Method for Reconstruction of Magnetic Resonance Images
This technology presents an improved Compressed Sensing (CS) method. This method analyzes every iteration in the CS reconstruction process and refines the solution. This process gives statistically more reliable solutions and provides for better reconstructed image quality with reduced signal to noise ratios. This method improves reconstruction times...
Published: 6/26/2023
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Inventor(s): Ali Bilgin, Yookyung Kim, Mariappan Nadar
Keywords(s):
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Medical Imaging
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