公开(公告)号：US20200174143A1

公开(公告)日：2020-06-04

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：US20180329078A1

公开(公告)日：2018-11-15

申请号：US15595266

申请日：2017-05-15

Applicant: General Electric Company

Inventor： Arie Shahar

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

CPC classification number: G01T1/16 ,  G01T1/244 ,  H01L27/1446 ,  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：US09989654B2

公开(公告)日：2018-06-05

申请号：US15660624

申请日：2017-07-26

Applicant: General Electric Company

Inventor： Arie Shahar

IPC: G01T1/24 ,  G01T1/29

CPC classification number: G01T1/244 ,  G01T1/24 ,  G01T1/249 ,  G01T1/2928

Abstract: A method is provided including acquiring detection events with a radiation detector including a semiconductor plate and configured to produce electrical signals in response to absorption of ionizing radiation in the semiconductor plate, wherein electrons and holes are generated responsive to absorption of the ionizing radiation. The semiconductor plate includes a first surface opposed to a second surface, with sidewalls interposed between the first surface and the second surface. A cathode electrode is disposed on the first surface and pixelated anode electrodes are disposed on the second surface. The method also includes optically coupling infrared (IR) radiation into a first portion of at least one of the sidewalls of the semiconductor plate of the radiation detector, and not coupling IR radiation into a second portion of the at least one of the sidewalls.

公开(公告)号：US09983320B1

公开(公告)日：2018-05-29

申请号：US15595350

申请日：2017-05-15

Applicant: General Electric Company

Inventor： Arie Shahar ,  Jean-Paul Bouhnik

IPC: H01L27/146 ,  G01T1/29 ,  G01T1/24 ,  G21K1/02

CPC classification number: G01T1/2928 ,  G01T1/242 ,  G01T1/247 ,  G21K1/02

Abstract: A detector assembly is provided that includes a semiconductor detector, a 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 (which in turn comprise corresponding pixelated anodes), and the second surface includes a cathode electrode. The collimator includes openings, with each opening associated with a single corresponding pixel of the semiconductor detector. The processing unit is configured to identify detected events within virtual sub-pixels distributed along a length and width of the semiconductor detector. Each pixel includes (e.g., has associated therewith) a plurality of corresponding virtual sub-pixels, with absorbed photons are counted as events in a corresponding virtual sub-pixel. Absorbed photons are counted as events within a thickness of the semiconductor detector at a distance corresponding to an energy window width used to identify the events as photon impacts.

公开(公告)号：US20170350993A1

公开(公告)日：2017-12-07

申请号：US15660624

申请日：2017-07-26

Applicant: General Electric Company

Inventor： Arie Shahar

IPC: G01T1/24 ,  G01T1/29

CPC classification number: G01T1/244 ,  G01T1/24 ,  G01T1/249 ,  G01T1/2928

Abstract: A method is provided including, acquiring detection events with a radiation detector including a semiconductor plate and configured to produce electrical signals in response to absorption of ionizing radiation in the semiconductor plate, wherein electrons and holes are generated responsive to absorption of the ionizing radiation. The semiconductor plate includes a first surface opposed to a second surface, with sidewalls interposed between the first surface and the second surface. A cathode electrode is disposed on the first surface and pixelated anode electrodes are disposed on the second surface. The method also includes optically coupling infrared (IR) radiation into a first portion of at least one of the sidewalls of the semiconductor plate of the radiation detector, and not coupling IR radiation into a second portion of the at least one of the sidewalk.

公开(公告)号：US20150063671A1

公开(公告)日：2015-03-05

申请号：US14014726

申请日：2013-08-30

Applicant: General Electric Company

Inventor： Arie Shahar ,  Eliezer Traub ,  Peter Rusian ,  Yaron Glazer ,  Danny Magal ,  Zeev Gerber

IPC: G01T1/164

CPC classification number: G01J1/4228 ,  G01J2001/442 ,  G01T1/164 ,  G01T1/1647

Abstract: A system includes a detector and a processing module. The detector includes pixels configured to detect an event corresponding to energy from a radiopharmaceutical. The processing module is configured to receive a request for each pixel that detects energy during a reading cycle. The processing module is configured to determine an energy level for each requesting pixel. For each requesting pixel, the processing module is configured to count the event when the energy level corresponds to an energy of the radiopharmaceutical, and to determine a combined energy level of the pixel and at least one adjacent pixel when the energy level does not correspond. The processing module is configured to count the event when the combined energy level corresponds to the energy of the radiopharmaceutical, and to disregard the event when the combined energy level does not correspond to the energy of the radiopharmaceutical.

Abstract translation: 系统包括检测器和处理模块。 检测器包括被配置为检测与来自放射性药物的能量相对应的事件的像素。 处理模块被配置为接收在读取周期期间检测能量的每个像素的请求。 处理模块被配置为确定每个请求像素的能级。 对于每个请求像素，处理模块被配置为当能级对应于放射性药物的能量时对事件进行计数，并且当能级不对应时确定像素和至少一个相邻像素的组合能级。 所述处理模块被配置为当所述组合能级对应于所述放射性药物的能量时对所述事件进行计数，以及当所述组合能级与所述放射性药物的能量不对应时，忽视所述事件。

公开(公告)号：US20140138556A1

公开(公告)日：2014-05-22

申请号：US13732080

申请日：2012-12-31

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Arie Shahar ,  Eliezer Traub ,  Floribertus P.M. Heukensfeldt Jansen

IPC: G01T1/16

CPC classification number: A61B6/037 ,  A61B6/4291 ,  G01T1/1648 ,  G21K1/02

Abstract: Collimators for two-dimensional scans of a radiation sources and methods of scanning are provided. One system includes a scan unit for scanning and collecting ionizing radiation emitted from a radiation emitting object is provided. The scan unit includes an array of at least one pixelated radiation detector having an imaging surface including a two-dimensional (2D) array of pixels. The scan unit also includes a collimator positioned between the radiation detector and the radiation emitting object, with the collimator including a 2D array of columns having openings and septa forming bores, wherein the columns are arranged in groups along rows of the 2D array of columns and the bores within one of the groups have a different aspect ratios than the bores in another one of the groups.

Abstract translation: 提供了用于辐射源的二维扫描和扫描方法的准直仪。 一个系统包括用于扫描和收集从辐射发射物体发射的电离辐射的扫描单元。 扫描单元包括具有包括二维（2D）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。 扫描单元还包括定位在辐射检测器和辐射发射物体之间的准直器，其中准直器包括具有开口和隔片形成孔的列的2D阵列，其中列沿着2D列阵列排成一组， 其中一个组中的孔与另一组中的孔具有不同的纵横比。

公开(公告)号：US20180356543A1

公开(公告)日：2018-12-13

申请号：US15621501

申请日：2017-06-13

Applicant: General Electric Company

Inventor： Arie Shahar ,  Moshe Cohen-Erner

IPC: G01T1/36

CPC classification number: G01T1/36 ,  G01T1/247 ,  G01T1/2928

Abstract: The systems and methods described herein measure a collected energy signal from a first pixel of a radiation pixelated detector during at least one event, and measure adjacent energy signals from at least two pixels adjacent to the first pixel of the radiation pixelated detector during the at least one event. The systems and methods generate a first spectrum based on the collected energy signal of the at least one event within an energy window. The energy window is a predetermined energy range for medical imaging. The systems and methods determine a delta charge based on the collected energy signal and the adjacent energy signals generated during the at least one event, generate a second spectrum based on the delta charge of the at least one event outside the energy window, and stretch the second spectrum to combine with the first spectrum to form a corrected energy spectrum.

公开(公告)号：US20180180748A1

公开(公告)日：2018-06-28

申请号：US15389956

申请日：2016-12-23

Applicant: General Electric Company

Inventor： Arie Shahar ,  Jean-Paul Bouhnik

IPC: G01T1/24

CPC classification number: G01T1/246 ,  G01T1/241

Abstract: A radiation detector system is provided that includes a semiconductor detector, plural pixelated anodes, and a side anode. The semiconductor detector has a surface. The pixelated anodes are disposed on the surface, and are arranged in a grid defining a footprint. The side anode is disposed outside of the footprint defined by the plural pixelated anodes, and has a length extending along at least two of the pixelated anodes.

公开(公告)号：US09927539B2

公开(公告)日：2018-03-27

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: H01L27/146 ,  G01T7/00 ,  G01T1/24 ,  G01T1/29

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.