39 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
Cone-Beam Filtered Backprojection Image Reconstruction Method for Short Trajectories
In computed tomography (CT) imaging, divergent beam data acquisition modes have the potential to speed up data acquisition and shorten scan time. However, image reconstruction from divergent-beam proj...
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Guang-Hong Chen | P05176US
Technology
Fan- and Cone-Beam Image Reconstruction Using Filtered Backprojection of Differentiated Projection
The Feldkamp (FDK) algorithm is widely used for image reconstruction for cone-beam projections, which are utilized in three-dimensional computed tomography (CT). However, because current FDK-type algo...
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Guang-Hong Chen | P04316US
Technology
Correction of CT Images for Truncated or Incomplete Projections
In clinical computed tomography (CT) practice, image artifacts arise when some data is missing or inconsistent, such as in the case of large patients that extend beyond the imaging field of view or pa...
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Guang-Hong Chen | P04315US
Technology
X-Ray System for Use in Image-Guided Procedures
Although stroke afflicts more than 700,000 people in the United States annually, the only FDA-approved clinical treatment is intravenous administration of tissue plasminogen activator (tPA) within thr...
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Charles Mistretta, Howard Rowley, Michael Van Lysel, Guang-Hong Chen | P03183US
Technology
Improved CT Image Reconstruction Method for Use with 1-D Detector Arrays
The introduction of 2-D detector arrays significantly improved the diagnostic potential of computed tomography (CT). However, accurate and efficient image construction from the data provided by these ...
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Guang-Hong Chen | P03161US
Technology
Fourier Space Tomographic Image Reconstruction Method
Most commercially available computed tomography (CT) systems employ image reconstruction methods based on the concepts of Radon space and the Radon transform. When a CT X-ray source projects a single ...
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Guang-Hong Chen, Charles Mistretta | P03295US
Technology
System And Method For Spectral Computed Tomography Using Single Polychromatic X-Ray Spectrum Acquisition
A system and method for material decomposition of a single energy spectrum x-ray dataset includes accessing the single energy spectrum x-ray dataset, receiving a userselection of a desired energy for ...
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Guang-Hong Chen, Yinsheng Li | P200043US01
Technology
Artificial Intelligence (AI)-Aided Technology to Achieve Patient Specific Dose Prescription and Delivery
UW-Madison researchers have developed an AI-assisted imaging technology that uses a deep neural network to reconstruct a 3-D model of the patient. This invention predicts patient positioning, beam int...
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Guang-Hong Chen, Juan Montoya, Thomas Grist | P180372US02
Technology
System And Method For Multi-Architecture Computed Tomography Pipeline
A system and method for reconstructing an image of a subject acquired using a tomographic imaging system includes at least one computer processor configured to form an image reconstruction pipeline. T...
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Guang-Hong Chen, Yinsheng Li | P180112US02
Technology
Image Reconstruction System and Method to Reduce Artifacts from 3-D Cone-Beam CT Systems
Conventional CT scans utilize a fan-shaped X-ray beam source and a detector array to acquire data for 2-D medical imaging. The source and detector array are situated on opposite sides of the patient ...
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Guang-Hong Chen | P06374US
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
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
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 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
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 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
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
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