Search Results - alejandro+sisniega

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Motion Correction Method for Digital Subtraction Angiography

Unmet NeedDigital subtraction angiography (DSA) is a commonly used x-ray technique in interventional radiology to visualize blood vessels. Two images are acquired, one with administration of iodine contrast in blood vessels and one without (non-contrast), and the subtraction of the two images yields a clear 2-dimensional (2D) projection of the vasculature...

Published: 9/27/2024 | Inventor(s): Jeffrey Siewerdsen, Alejandro Sisniega

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Category(s): Technology Classifications > Medical Devices > Imaging

Backprojection Method for 3D Image Reconstruction

Unmet NeedComputed tomography (CT) use has dramatically increased over the past 20 years such that around 31% of primary care patients undergo CT scans every year. All CT scans employ “back-projection” as the basic computational method to relate 2D detector signal values into a 3D re-construction. However, image reconstruction sometimes leads to noise...

Published: 9/27/2024 | Inventor(s): Jeffrey Siewerdsen, Alejandro Sisniega, Joseph Stayman

Keywords(s): Image Display Hardware, Image Display Software, Imaging and Sensing Systems, In Vivo Medical Imaging, Integrated Imaging System

Category(s): Technology Classifications > Computers, Electronics & Software > Image Processing & Analysis, Technology Classifications > Computers, Electronics & Software > Machine Learning, Technology Classifications > Medical Devices > Imaging

Multi-Motion Compensation for Computed Tomography

Unmet NeedDuring computed tomography (CT) or cone-beam CT, scans can be affected due to patient motion that causes significant artifacts that diminish image quality. This is functionally the case because of slow image acquisition speed, causing artifacts in the image due to patient’s difficulty in following commands and remaining still. Furthermore,...

Published: 9/26/2024 | Inventor(s): Jeffrey Siewerdsen, Wojciech Zbijewski, Alejandro Sisniega, Joseph Stayman

Keywords(s): Image Processing Software, Image Reconstruction, Imaging and Sensing Systems, Imaging Modality, In Vivo Medical Imaging, X-ray Computed Tomography (CT)

Category(s): Technology Classifications > Medical Devices > Imaging