General Electric Company

Ge Precision Healthcare LLC

Ge Medical Systems Global Technology Company, LLC

Prismatic Sensors Ab

Teledyne Dalsa B.v.

Teledyne Digital Imaging, Inc.

Global Life Sciences Solutions Germany Gmbh

Brian David Yanoff

Biju Jacob

Jianjun Guo

Peter Michael Edic

Geng Fu

Yannan Jin

Xue Rui

Yanfeng Du

Uwe Wiedmann

John Eric Tkaczyk

Naresh Kesavan Rao

Jonathan David Short

Douglas Albagli

Aaron Judy Couture

Hakan Erik Roos

Yu Zhao

Feng Pan

Jeffery Jon Shaw

Bruno Kristiaan Bernard De Man

Habib Vafi

Ping Xue

Sergei Ivanovich Dolinsky

Adrian Ivan

Wen Li

Hao Lai

Juan Pablo Cilia

Charles Gerard Woychik

David Michael Hoffman

Yaron Hefetz

Jing Li

George E Possin

Yunfeng Sun

Kenneth Scott Kump

John Michael Sabol

Ravindra Mohan Manjeshwar

John Scott Price

William Andrew Hennessy

Renato Guida

Wenqing Peng

Nicholas Ryan Konkle

Richard Aufrichtig

Prabhjot Singh

Chengbao Wang

Yun Zou

Gideon Berlad

Katelyn Rose Nye

William Robert Ross

Loucas Tsakalakos

Lin Fu

John Moore Boudry

Christopher David Unger

Liping Zheng

Ansas Matthias Kasten

Gregory Scott Zeman

Jun Xiao

Torbjörn Hjärn

Evren Asma

Zhaoping Wu

Mingye Wu

Feng Chen

Garth M Nelson

Cheng Xu

Brian Joseph Graves

Stanislav Ivanovich Soloviev

Katsumasa Nose

Floribertus Heukensfeldt Jansen

Mark Adamak

J Eric Tkaczyk

Kun Tao

Hua Qian

Sudeep Mandal

Jeffrey Jon Shaw

Brian Joseph Breuer

Vladimir Anatolievich Lobastov

Fredrik Gronberg

Ibrahim Issoufou Kouada

Martin Kinfei Lee

Bartholomeus G M H Dillen

Tan Zhang

Girish Bal

Inge Peters

Jacob Biju

Osnat Zak

Qian Hua

Mylene Roussel

Hengshan Gao

Jonathan Short

Anton Van Arendonk

Barthomlomeus Dillen

Systems and methods are provided for a detector for medical imaging. The detector for medical imaging includes a mesh detector element formed on a planar side of a first semiconductor layer. The mesh detector element includes a metal layer including a plurality of longitudinal strips, where each longitudinal strip is positioned over a respective second semiconductor layer of the opposite doping polarity from the first semiconductor layer, and embedded in the first semiconductor layer. Further, each longitudinal strip is separated from a neighboring longitudinal strip by a respective opening of a plurality of openings, such that the metal layer does not extend continuously across a width of the mesh detector element.

Medical imaging detector

Methods and systems are provided for repairing a defective segment of a sensor array of a photon counting detector of a photon counting computed tomography (PCCT) imaging system. In one example, a method for a PCCT imaging system comprises dividing a segment of the sensor array into a plurality of sub-segments, wherein each sub-segment of the plurality of sub-segments is electrically coupled to a readout electronics, the readout electronics configured to calculate a photon count for the segment; generating a total photon count for the divided segment based on combined electrical signals produced at each sub-segment of the divided segment; and reconstructing an image based on the total photon count at the divided segment. A defect detected in the divided segment may be traced to a defective sub-segment, which may be isolated from the readout electronics, thereby increasing a quality of the reconstructed image.

Photon counting computed tomography (PCCT) detector sensor repair for increased sensor yield

There is provided an X-ray imaging system having an X-ray source, an X-ray detector and a collimator assembly in the X-ray path between the X-ray source and the X-ray detector. The X-ray detector comprises a plurality of detector modules arranged side-by-side and adapted to be oriented towards the X-ray source, the detector modules being arranged side-by-side along a direction substantially orthogonal to the direction of incoming X-rays. The collimator assembly is based on a plurality of spaced collimator plates arranged side-by-side in a direction coinciding with the direction of the detector modules. The collimator assembly further comprises a physically stabilizing lateral support structure arranged in a lateral plane extending in a direction substantially orthogonal to the direction of incoming X-rays.

Collimator assembly for an X-ray detector

A phase-contrast imaging detector includes a plurality of pixels. Each pixel includes a detection material that generates a measurable parameter in response to X-ray photons. Each pixel also includes a plurality of sub-pixel resolution readout structures. The sub-pixel resolution readout structures are in an alternating pattern with a spacing therebetween that is larger than a frequency of a phase-contrast interference pattern but small enough to enable charge sharing between adjacent sub-pixel resolution readout structures when an X-ray photon hits between the adjacent sub-pixel resolution readout structures. The phase-contrast imaging detector also includes readout circuitry configured to read out signals from the plurality of sub-pixel readout structures. The plurality of sub-pixel resolution readout structures includes two or more electrodes having alternating arms that form an interleaved comb structure.

High-resolution detector having a reduced number of pixels

An X-ray detector is provided. The X-ray detector includes multiple detector sub-modules. Each detector sub-module includes a semiconductor layer and multiple detector elements. A plurality of detector elements is disposed on the semiconductor layer. Wiring traces extending from the plurality of detector elements to readout circuitry, where each detector element is coupled to a respective wiring trace. One or more of the wiring traces extend over one or more detector elements of the plurality of detector elements. Processing circuitry is configured to perform coincidence detection to determine which detector element of the plurality of detector elements is associated with a location of an X-ray hit when the X-ray coincidently hits one of the detector elements of the plurality of detector elements and one or more of the wiring traces coupled to respective detector elements of the plurality of detector elements.

System and method for mitigating trace triggering of channels in X-ray detector

An X-ray detector is provided. The X-ray detector includes multiple detector sub-modules. Each detector sub-module includes a semiconductor layer and multiple detector elements. A plurality of detector elements is disposed on the semiconductor layer. Wiring traces extending from the plurality of detector elements to readout circuitry, where each detector element is coupled to a respective wiring trace. The wiring traces are routed within a gap between adjacent detector elements of the plurality of detector elements. Processing circuitry is configured to perform coincidence detection to determine which detector element of the plurality of detector elements is associated with a location of an X-ray hit when the X-ray coincidently hits one of the detector elements of the plurality of detector elements and one or more of the wiring traces coupled to respective detector elements of the plurality of detector elements.

An X-ray detector is provided. The X-ray detector includes multiple detector sub-modules. Each detector sub-module includes a semiconductor layer and multiple detector elements. A first detector element of the multiple detector elements includes a first electrode disposed on a first doped implant and a second detector element of the multiple detector elements includes a second electrode disposed on a second doped implant. The first and second detector elements are disposed on the semiconductor layer adjacent to each other with a gap therebetween. Each detector sub-module also includes wiring traces extending from one or more detector elements of the multiple detector elements to readout circuitry. The wiring traces are routed within the gap between the first and second electrodes. The first doped implant extends underneath a portion of the wiring traces is configured to shield the wiring traces from electrical activity occurring underneath due to absorption of an X-ray.

System and method for mitigating trace triggering of channels in x-ray detector

The present disclosure relates to fabrication and use of a phase-contrast imaging detector that includes sub-pixel resolution electrodes or photodiodes spaced to correspond to a phase-contrast interference pattern. A system using such a detector may employ fewer gratings than are typically used in a phase-contrast imaging system, with certain functionality typically provided by a detector-side analyzer grating being performed by sub-pixel resolution structures (e.g., electrodes or photodiodes) of the detector. Measurements acquired using the detector may be used to determine offset, amplitude, and phase of a phase-contrast interference pattern without multiple acquisitions at different phase steps.

X-ray phase contrast detector

Methods and systems are provided for coherent scattered imaging using a computed tomography system with segmented detector arrays. In one embodiment, a method includes imaging a region of interest with an x-ray source and a segmented photon-counting detector array, detecting a position of an object of interest in the region of interest, selectively scanning, via the x-ray source and the segmented photon-counting detector array, the object of interest, detecting a coherent scatter signal from the object of interest with the segmented photon-counting detector array, and determining a material of the object of interest based on the detected coherent scatter signal. In this way, the coherent scatter signal may be used to identify and investigate lesions or other objects of interest within an imaged volume.

Systems and methods for coherent scatter imaging using a segmented photon-counting detector for computed tomography

There is provided an x-ray detector having a number of x-ray detector sub-modules. Each detector sub-module is an edge-on detector sub-module having an array of detector elements extending in at least two directions, wherein one of the directions has a component in the direction of incoming x-rays. The detector sub-modules are stacked one after the other and/or arranged side-by-side. For at least part of the detector sub-modules, the detector sub-modules are arranged for providing a gap between adjacent detector sub-modules, where at least part of the gap is not directed linearly towards the x-ray focal point of an x-ray source.

X-ray detector system design

The present approach relates to the use of detector elements (i.e., reference detector pixels) positioned under septa of an anti-scatter collimator. Signals detected by the reference detector pixels may be used to correct for charging-sharing events with adjacent pixels and/or to characterize or correct for focal spot misalignment either in real time or as a calibration step.

Reference detector elements in conjunction with an anti-scatter collimator

Various approaches are discussed for using four-side buttable CMOS tiles to fabricate detector panels, including large-area detector panels. Fabrication may utilize pads and interconnect structures formed on the top or bottom of the CMOS tiles. Electrical connection and readout may utilize readout and digitization circuitry provided on the CMOS tiles themselves such that readout of groups or sub-arrays of pixels occurs at the tile level, while tiles are then readout at the detector level such that readout operations are tiered or multi-level.

Radiation detector assembly

A method for imaging an object to be reconstructed includes acquiring projection data corresponding to the object. Furthermore, the method includes generating a measured sinogram based on the acquired projection data and formulating a forward model, where the forward model is representative of a characteristic of the imaging system. In addition, the method includes generating an estimated sinogram based on an estimated image of the object and the forward model and formulating a statistical model based on at least one of pile-up characteristics and dead time characteristics of a detector of the imaging system. Moreover, the method includes determining an update corresponding to the estimated image based on the statistical model, the measured sinogram, and the estimated sinogram and updating the estimated image based on the determined update to generate an updated image of the object. Additionally, the method includes outputting a final image of the object.

System and method for statistical iterative reconstruction and material decomposition

The present approach relates to scatter correction of signals acquired using radiation detectors on a pixel-by-pixel basis. In certain implementations, the systems and methods disclosed herein facilitate scatter correction for signals generated using a detector having segmented detector elements, such as may be present in an energy-resolving, photon-counting CT imaging system.

Scatter correction technique for use with a radiation detector

Growing community of inventors

Niskayuna, NY, United States of America

Brian David Yanoff