公开(公告)号：US10145964B1

公开(公告)日：2018-12-04

申请号：US15595266

申请日：2017-05-15

Applicant: General Electric Company

Inventor： Arie Shahar

IPC: G01T1/16 ,  H01L27/144 ,  H01L31/0296

Abstract: A detector assembly is provided that includes a semiconductor detector, a pinhole collimator, and a processing unit. The semiconductor detector has a first surface and a second surface opposed to each other. The first surface includes pixels, and the second surface includes a cathode electrode. The pinhole collimator includes an array of pinhole openings corresponding to the pixels. Each pinhole opening is associated with a single pixel of the semiconductor detector, and the area of each pinhole opening is smaller than a corresponding area of the corresponding pixel. The processing unit is operably coupled to the semiconductor detector and configured to identify detected events within virtual sub-pixels distributed along a length and width of the semiconductor detector. Each pixel includes a plurality of corresponding virtual sub-pixels (as interpreted by the processing unit), wherein absorbed photons are counted as events in a corresponding virtual sub-pixel.

公开(公告)号：US20180190842A1

公开(公告)日：2018-07-05

申请号：US15398033

申请日：2017-01-04

Applicant: General Electric Company

Inventor： Arie Shahar ,  Jean-Paul Bouhnik

IPC: H01L31/0224 ,  H01L31/18 ,  H01L31/0296 ,  G01T1/24

CPC classification number: H01L31/022408 ,  G01T1/241 ,  G01T1/247 ,  H01L31/02966 ,  H01L31/1832

Abstract: A radiation detection system is provided. The radiation detection system includes a radiation detector. The radiation detector includes a semiconductor layer having a first surface and a second surface opposite the first surface, a monolithic cathode disposed on the first surface, and multiple pixelated anode strip-electrodes disposed on the second surface in a coplanar arrangement. The multiple pixelated anode strip-electrodes include a first set of pixelated anode strip-electrodes disposed along a first direction and a second set of pixelated anode strip-electrodes disposed along a second direction orthogonal to the first direction. Each pixelated anode strip-electrode of the first set of pixelated anode strip-electrodes includes a first respective multiple segments disposed along the first direction. Each pixelated anode strip-electrode of the second set of pixelated anode strip-electrodes includes a second respective multiple segments disposed along the second direction.

公开(公告)号：US09954132B2

公开(公告)日：2018-04-24

申请号：US14526796

申请日：2014-10-29

Applicant: General Electric Company

Inventor： Arie Shahar ,  Yaron Glazer ,  Jeffrey Levy ,  Avishai Ofan ,  Rotem Har-Lavan

IPC: H01L31/08 ,  G01T1/24 ,  H01L31/0296 ,  H01L31/0224 ,  H01L31/18

CPC classification number: H01L31/085 ,  G01T1/24 ,  G01T1/249 ,  H01L31/022408 ,  H01L31/0296 ,  H01L31/02966 ,  H01L31/1828 ,  H01L31/1832 ,  H01L31/1864

Abstract: A radiation detector is provided including a cathode, an anode, and a semiconductor wafer. The semiconductor wafer has opposed first and second surfaces. The cathode is mounted to the first surface, and the anode is mounted to the second surface. The semiconductor wafer is configured to be biased by a voltage between the cathode and the anode to generate an electrical field in the semiconductor wafer and to generate electrical signals responsive to absorbed radiation. The electrical field has an intensity having at least one local maximum disposed proximate to a corresponding at least one of the first surface or second surface.

公开(公告)号：US20170269240A1

公开(公告)日：2017-09-21

申请号：US15613998

申请日：2017-06-05

Applicant: General Electric Company

Inventor： Arie Shahar ,  Mark David Fries ,  Yaron Glazer ,  Avishai Ofan

IPC: G01T7/00 ,  G01T1/24

CPC classification number: G01T7/005 ,  G01J1/4228 ,  G01J2001/442 ,  G01T1/249 ,  G01T1/2928

Abstract: A radiation detector assembly is provided that includes a semiconductor detector having a surface, plural pixelated anodes, and at least one processor. The pixelated anodes are disposed on the surface. Each pixelated anode is configured to generate a primary signal responsive to reception of a photon by the pixelated anode and to generate at least one secondary signal responsive to an induced charge caused by reception of a photon by at least one adjacent anode. The at least one processor is operably coupled to the pixelated anodes. The at least one processor configured to define sub-pixels for each pixelated anode; acquire signals corresponding to acquisition events from the pixelated anodes; determine sub-pixel locations for the acquisition events using the signals; and apply at least one calibration parameter on a per sub-pixel basis for the acquisition events based on the determined sub-pixel locations.

公开(公告)号：US20170199286A1

公开(公告)日：2017-07-13

申请号：US14994895

申请日：2016-01-13

Applicant: General Electric Company

Inventor： Arie Shahar

IPC: G01T1/24

CPC classification number: G01T1/24 ,  G01T1/249

Abstract: A method is provided including acquiring detection events with a radiation detector that includes a semiconductor plate. Electrons and holes are generated in the semiconductor plate responsive to absorption of ionizing radiation. The holes including groups of holes having different effective masses for corresponding different valence energy bands. The method also includes optically coupling infrared (IR) radiation into the semiconductor plate of the radiation detector. The IR radiation has at least one wavelength selected from a spectral range including wavelengths to which the semiconductor plate is partially transparent. The wavelengths of the IR radiation are configured to excite at least some of the holes from a first group at a first valence energy band to a second group at a second valence energy band, with the holes of the second group having lower effective masses than corresponding holes of the first group.

公开(公告)号：US09613992B2

公开(公告)日：2017-04-04

申请号：US13924690

申请日：2013-06-24

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Arie Shahar ,  Eliezer Traub ,  Israel Altman

IPC: H01L27/144 ,  H01L31/0216 ,  H01L31/18 ,  G01T1/24 ,  H01L27/146

CPC classification number: H01L27/1469 ,  G01T1/24 ,  G01T1/243 ,  H01L27/144 ,  H01L27/1446 ,  H01L27/146 ,  H01L27/14618 ,  H01L27/14659 ,  H01L27/14685

Abstract: A detector module for detecting photons includes a detector formed from a semiconductive material, the detector having a first surface, an opposing second surface, and a plurality of sidewalls extending between the first and second surfaces, and a guard band coupled to the sidewalls, the guard band having a length that extends about a circumference of the detector, the guard band having a width that is greater than a thickness of the detector such that an upper rim segment of the guard band projects beyond the first surface of the detector, the upper rim segment being folded over a peripheral region of the first surface along the circumference of the detector, the guard band configured to reduce recombinations proximate to the edges of the detector.

公开(公告)号：US20170090047A1

公开(公告)日：2017-03-30

申请号：US14871033

申请日：2015-09-30

Applicant: General Electric Company

Inventor： Arie Shahar ,  Avishai Ofan ,  Jeffrey Michael Levy ,  Moshe Cohen-Erner ,  Yaron Glazer

IPC: G01T1/24 ,  G21K1/02

CPC classification number: G01T1/247 ,  G01T1/17 ,  H01L27/146 ,  H01L27/14605 ,  H04N5/347

Abstract: A radiation detector processing assembly is provided including at least one application specific integrated circuit (ASIC). The radiation detector processing assembly includes plural input channels, a common readout, and a readout channel. Each input channel is configured to receive an input corresponding to a detection event from a pixel of a pixelated detector. The common readout is operably coupled to the plural input channels, and is configured to receive a corresponding output signal from each input channel. Each corresponding output signal has a unique address identifying the corresponding input channel. The readout channel is configured to receive a corresponding readout output from the common readout. The readout output includes output signals from a corresponding group of input channels.

公开(公告)号：US09261611B2

公开(公告)日：2016-02-16

申请号：US13624660

申请日：2012-09-21

Applicant: General Electric Company

Inventor： Arie Shahar ,  Eliezer Traub

IPC: G01T1/29 ,  G01T1/164 ,  A61B6/00 ,  A61B6/03

CPC classification number: G01T1/2985 ,  A61B6/032 ,  A61B6/037 ,  A61B6/4291 ,  A61B6/5205 ,  A61B6/542 ,  G01T1/1648

Abstract: Systems and methods for scanning with radiation detectors are provided. One system includes at least one radiation scanning camera-head, an array of at least one pixelated radiation detector having an imaging surface including a two dimensional array of pixels, and a scanning unit positioned between the radiation detector and the object. The scanning unit includes first and second radiation blocking plates having first and second two-dimensional arrays of openings, respectively, wherein the array of pixels and the first and second arrays of openings have a same pitch. Additionally, for each of a plurality of scan positions of the scanning unit, the first and second moveable plates and the imaging surface are positioned differently with respect to each other to produce different inclination angles in response to each scan position.

Abstract translation: 提供了使用辐射探测器进行扫描的系统和方法。 一个系统包括至少一个辐射扫描相机头，具有包括二维像素阵列的成像表面的至少一个像素化辐射检测器的阵列，以及位于辐射检测器和物体之间的扫描单元。 扫描单元包括分别具有第一和第二二维开口阵列的第一和第二辐射阻挡板，其中像素阵列和第一和第二开口阵列具有相同的间距。 此外，对于扫描单元的多个扫描位置中的每一个，第一和第二可移动板和成像表面相对于彼此不同地定位，以响应于每个扫描位置产生不同的倾斜角度。

公开(公告)号：US10976452B2

公开(公告)日：2021-04-13

申请号：US16687262

申请日：2019-11-18

Applicant: General Electric Company

Inventor： Arie Shahar ,  Roi Harpaz ,  Elhanan Blaut

IPC: G01T1/24 ,  G01T7/00

Abstract: A radiation detector assembly is provided that includes a semiconductor detector, plural pixelated anodes, and at least one processor. The semiconductor detector has a surface. The plural pixelated anodes are configured to generate a primary signal responsive to reception of a photon by the pixelated anode and to generate at least one secondary signal responsive to an induced charge caused by reception of a photon by at least one surrounding anode. The at least one processor is configured to: acquire a primary signal from one of the anodes responsive to reception of a photon; acquire at least one secondary signal from at least one neighboring pixel of the one of the anodes, the at least one secondary signal defining a negative value; and determine an energy correction factor for the reception of the photon using the negative value of the at least one secondary signal.

公开(公告)号：US10324200B2

公开(公告)日：2019-06-18

申请号：US16208039

申请日：2018-12-03

Applicant: General Electric Company

Inventor： Arie Shahar

IPC: G01T1/24 ,  H01L27/146

Abstract: A detector assembly is provided that includes a semiconductor detector, a pinhole collimator, and a processing unit. The semiconductor detector has a first surface and a second surface opposed to each other. The first surface includes pixelated anodes. The pinhole collimator includes an array of pinhole openings corresponding to the pixelated anodes. Each pinhole opening corresponds to a corresponding group of pixelated anodes. The processing unit is operably coupled to the semiconductor detector and configured to identify detected events from the pixelated anodes. The processing unit is configured to generate a trigger signal responsive to a given detected event in a given pixelated anode, provide the trigger signal to a readout, and, using the readout, read and sum signals arriving from the given pixelated anode and anodes surrounding the given pixelated anode.