38 Results for 'guang-hong chen'
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Technology
Method for Data-Consistency Preparation and Improved Image Reconstruction
Routinely, data acquired with medical imaging systems are not consistent with a single true image of the subject. Data inconsistencies arise from various causes (beam-hardening effects, subject motion...
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Guang-Hong Chen | P170192US01
Technology
Universal Signal-to-Noise Ratio Enhancement Using PICCS Image Reconstruction
Signal-to-noise ratio (SNR) is utilized in medical imaging as a quantitative measure of image quality. As SNR decreases, it becomes increasingly more difficult to differentiate between important anato...
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Guang-Hong Chen, Jie Tang | P100275US01
Technology
Prior Image Constrained Compressed Sensing (PICCS)
In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
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Guang-Hong Chen | P08127US
Technology
Image Reconstruction Method for High Temporal Resolution Image Guided Radiaton Therapy
Computed tomography (CT) systems are used for medical imaging and produce images by measuring the loss in an X-ray beam’s strength. These measurements are used to reconstruct an image in 2-D or 3-D...
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Guang-Hong Chen, Shuai Leng | P08125US
Technology
Real-Time Progressive Medical Image Reconstruction Method for Time-Resolved Data
Computed tomography (CT) systems are used for medical imaging and produce images by measuring the loss in an X-ray beam’s strength. These measurements are used to reconstruct an image in 2-D or 3-D...
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Guang-Hong Chen, Jie Tang | P08250US
Technology
High Temporal Resolution Cardiac CT Imaging with Slowed Gantry Speed
In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
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Guang-Hong Chen | P08233US
Technology
“DR-PICCS” – Dose Reduction Using PICCS Image Reconstruction Algorithms
In imaging technologies, signal-to-noise ratio (SNR) is a quantitative measure of image quality. In medical imaging specifically, as SNR decreases, it becomes increasingly difficult to differentiate b...
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Guang-Hong Chen, Jie Tang, Brian Nett | P100141US01
Technology
Hybrid Method for Prior Image Reconstruction in Cardiac Cone-Beam Computed Tomography
The X-ray source and radiation detector in a conventional computed tomography (CT) system are rotated on a gantry so that the angle at which the X-ray beams intersect the object constantly changes. In...
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Guang-Hong Chen, Jie Tang | P09177US02
Technology
Cardiac Image Reconstruction with Improved Temporal Resolution
Visualizing a patient’s heart by non-invasive cardiovascular imaging is a powerful tool for diagnosis and therapy. Yet the heart’s movement and small branching arteries make quality cardiac imagin...
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Guang-Hong Chen, Jie Tang | P09268US
Technology
SYSTEM AND METHOD FOR CONTROLLING ERRORS IN COMPUTED TOMOGRAPHY NUMBER
UW-Madison researchers developed a method to correct the CT number accuracy degradation problem in low dose CT imaging. By understanding the CT number bias resulting from clinical implementations, the...
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Guang-Hong Chen, Ke Li | P220025US01
Technology
Medical Imaging with Better Temporal Fidelity Can Streamline Stroke Care
The outcome of a stroke can hinge on the time spent on diagnosis and intervention. Perfusion imaging is a critical step in the process, wherein a patient is scanned to identify salvageable tissue. The...
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Guang-Hong Chen, Jie Tang | P130041US01
Technology
SYSTEM AND METHOD FOR CONTROLLING ERRORS IN COMPUTED TOMOGRAPHY NUMBER WITHOUT RAW DETECTOR COUNT DATA
UW Madison researchers have developed a new method to correct inaccurate CT numbers in low radiation dose photon counting CT imaging without knowing the raw photon counts. The methods address situ...
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Guang-Hong Chen, Ke Li | P230045US01
Technology
Simultaneous Image Reconstruction and Artifact Reduction
With conventional image reconstruction, a single image is produced from a corresponding set of data. For example, an image can be reconstructed from a single CT sonogram or one MRI data set. Such dire...
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Guang-Hong Chen | P130064US01
Technology
SYSTEM AND METHOD FOR CONTROLLING ZERO-COUNT ERRORS IN COMPUTED TOMOGRAPHY
UW Madison inventors have developed methods to properly address the zero-count problem in ultra-low radiation dose photon counting CT imaging that includes acquiring or accessing CT data of a subject,...
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Guang-Hong Chen, Ke Li | P230046US01
Technology
Statistical Noise Map for Reducing X-Ray Exposure
Iterative image reconstruction techniques can be used to produce high quality tomographic images from noise-contaminated data. It is known that a statistical weight is critical for great image quality...
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Guang-Hong Chen, Jie Tang | P130056US01
Technology
SYSTEMS AND METHODS FOR IMPROVED COMPUTED TOMOGRAPHY USING PHOTON-COUNTING DETECTORS
UW researchers present a novel hybrid photon counting detector for imaging. The novel design addresses the fundamental limitations of current silicon PCD technology by replacing the metallic spacers ...
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Ke Li, Guang-Hong Chen | P220199US01
Technology
SYSTEMS AND METHODS FOR CONTROLLING SCATTER IN COMPUTED TOMOGRAPHY DATA
UW-Madison researchers have developed a novel data acquisition method, called “Mohi-Polo”. The method eliminates scatter radiation in photon counting CT imaging systems to minimize scatter artifa...
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Guang-Hong Chen, Ran Zhang, Ke Li | P230044US01
Technology
SYSTEM AND METHOD FOR QUANTITATIVE BLOOD VOLUME IMAGING
UW inventors have devised a new method to provide quantitative lung perfusion imaging using spectral CT imaging. Data acquired using DE-CT, or single kV, is post-processed using a trained algorithm ...
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Guang-Hong Chen, Ke Li, Thomas Grist | P210311US01
Technology
System And Method For Denoising Medical Images By Enforcing Low Rank Spatial-Temporal Or Spatial-Spectral Image Matrices
Systems and methods for generating one or more denoised images from a series of noisy images acquired with a medical imaging system are described. In general, the systems and methods described here im...
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Guang-Hong Chen | P160120US01
Technology
System And Method For Simultaneous Image Artifact Reduction And Tomographic Reconstruction Of Images Depicting Temporal Contrast Dynamics
Described here is a system and method for image reconstruction that can automatically and iteratively produce multiple images from one set of acquired data, in which each of these multiple images corr...
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Guang-Hong Chen | P160119US01
Technology
System And Method For High-Temporal Resolution, Time-Resolved Cone Beam Ct Angiography
A system and method for reconstructing an image using a cone-beam computed tomography (CT) imaging system includes acquiring data from a subject with the CT imaging system using a limited scan range t...
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Guang-Hong Chen, Charles Strother | P160332US01
Technology
Calculation Of Additional Projection Data From Projection Data Acquired With A Divergent Beam
A data consistency condition is derived for an array of attenuation values acquired with a divergent beam. Using this data consistency condition, estimates of selected attenuation values can be calcul...
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Guang-Hong Chen | P06161US
Technology
Systems And Methods For Artifact Removal For Computed Tomography Imaging
An imaging system includes a computed tomography (CT) acquisition unit and at least one processor. The CT acquisition unit includes an X-ray source and a CT detector configured to collect CT imaging d...
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Guang-Hong Chen, Jiang Hsieh | P150065US01
Technology
Eliminating CT Image Artifacts Using Artifact ‘Dictionaries’
In modern computed tomography (CT) imaging, a number of non-ideal physical conditions may cause artifacts in the reconstructed images. Mitigation or elimination of image artifacts has been a time- and...
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Guang-Hong Chen, Jiang Hsieh | P160118US01
Technology
Dual-Energy CT Cuts Costs, Radiation Dose
Dual-energy computed tomography (CT) was first proposed in the 1970s but has wavered in practical usage ever since. In essence, the process employs two different X-ray spectra (i.e., a high energy lev...
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Guang-Hong Chen | P130360US01