公开(公告)号：US11327031B2

公开(公告)日：2022-05-10

申请号：US15929150

申请日：2019-10-01

Applicant: Canon Medical Systems Corporation

Inventor： Kenta Moriyasu ,  Taichiro Shiodera ,  Shuhei Nitta ,  Tomoyuki Takeguchi ,  Hidenori Takeshima ,  Toshiyuki Ono ,  Takashi Ida ,  Hiroaki Nakai

IPC: G01N23/087 ,  G01T1/29 ,  G01N23/046 ,  A61B6/00 ,  A61B6/03 ,  A61B6/06

Abstract: A photon counting X-ray CT apparatus according to an embodiment includes: data acquiring circuitry, and processing circuitry. The data acquiring circuitry is configured to allocate energy measured by signals output from a photon counting detector in response to incidence of X-ray photons to any of a plurality of first energy bins so as to acquire a first data group as count data of each of the first energy bins. The processing circuitry is configured to determine a plurality of second energy bins obtained by grouping the first energy bins in accordance with a decomposition target material that is a material to be decomposed in a imaging region, allocate the first data group to any of the second energy bins so as to generate a second data group, and use the second data group to generate an image representing a distribution of the decomposition target material.

公开(公告)号：US20180242927A1

公开(公告)日：2018-08-30

申请号：US15902508

申请日：2018-02-22

Applicant: Canon Medical Systems Corporation

Inventor： Hiroaki Nakai ,  Emi Tamura ,  Hiroaki Miyazaki ,  Mikihito Hayashi ,  Tooru Kato ,  Naoki Sugihara

IPC: A61B6/03 ,  A61B6/00 ,  A61B6/04

CPC classification number: A61B6/032 ,  A61B6/0457 ,  A61B6/4035 ,  A61B6/4208 ,  A61B6/4233 ,  A61B6/5205 ,  G01T1/17 ,  G01T1/2018 ,  G01T1/2985

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube and an X-ray detector. The X-ray tube generates X-rays. The X-ray detector includes a first detection area detecting the X-rays and a second detection area detecting the X-rays. The first detection area includes a first scintillator having a first fluorescence decay time, the second detection area includes a second scintillator having a second fluorescence decay time shorter than the first fluorescence decay time. The second detection area is arranged at both ends of the first detection area with respect to a channel direction.

公开(公告)号：US10667774B2

公开(公告)日：2020-06-02

申请号：US16041224

申请日：2018-07-20

Applicant: Canon Medical Systems Corporation

Inventor： Tooru Kato ,  Hiroaki Miyazaki ,  Emi Tamura ,  Hiroaki Nakai

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/06

Abstract: An X-ray CT apparatus according to an embodiment includes a photon counting detector and processing circuitry. The photon counting detector includes a plurality of detection areas arranged in a channel direction and a column direction and is configured to output detection signals corresponding to the quantity of photons incident thereto, the detection areas each including a plurality of detecting elements. The processing circuitry is configured to calculate a heat generation amount for each of the detection areas on the basis of the detection signal corresponding to the incident photons detected in the detection area, to determine a control amount on the basis of the heat generation amount calculated for each of the detection areas, and to control temperature in each of the detection areas by using the determined control amount.

公开(公告)号：US20200033273A1

公开(公告)日：2020-01-30

申请号：US15929150

申请日：2019-10-01

Applicant: Canon Medical Systems Corporation

Inventor： Kenta Moriyasu ,  Taichiro Shiodera ,  Shuhei Nitta ,  Tomoyuki Takeguchi ,  Hidenori Takeshima ,  Toshiyuki Ono ,  Takashi Ida ,  Hiroaki Nakai

IPC: G01N23/087 ,  A61B6/03 ,  A61B6/00 ,  G01N23/046 ,  G01T1/29

Abstract: A photon counting X-ray CT apparatus according to an embodiment includes: data acquiring circuitry, and processing circuitry. The data acquiring circuitry is configured to allocate energy measured by signals output from a photon counting detector in response to incidence of X-ray photons to any of a plurality of first energy bins so as to acquire a first data group as count data of each of the first energy bins. The processing circuitry is configured to determine a plurality of second energy bins obtained by grouping the first energy bins in accordance with a decomposition target material that is a material to be decomposed in a imaging region, allocate the first data group to any of the second energy bins so as to generate a second data group, and use the second data group to generate an image representing a distribution of the decomposition target material.

公开(公告)号：US12004887B2

公开(公告)日：2024-06-11

申请号：US17162043

申请日：2021-01-29

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Go Kawata ,  Hiroaki Nakai

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/42 ,  G01T1/16 ,  G01T1/20 ,  G01T1/22 ,  G01T1/29

CPC classification number: A61B6/037 ,  A61B6/4241 ,  A61B6/4258 ,  A61B6/4266 ,  A61B6/4275 ,  A61B6/482 ,  A61B6/5205 ,  A61B6/5282 ,  G01T1/1603 ,  G01T1/2018 ,  G01T1/22 ,  G01T1/2985

Abstract: A radiation diagnosis device according to an embodiment includes a first detector and a second detector. The first detector detects Cherenkov light generated when a radiation passes. The second detector is provided to face the first detector on a side farther from a source of generating the radiation and detects the energy information of the radiation.

公开(公告)号：US11559269B2

公开(公告)日：2023-01-24

申请号：US16987749

申请日：2020-08-07

Applicant: Canon Medical Systems Corporation

Inventor： Hiroaki Nakai

IPC: A61B6/00 ,  G01T1/24 ,  G06N5/04 ,  G06T11/00 ,  G06N20/00 ,  A61B6/03 ,  G06N3/04

Abstract: In general, an X-ray imaging apparatus according to one embodiment includes an X-ray tube, an X-ray detector, and processing circuitry. The processing circuitry is configured to obtain correction-target data that includes component deterioration resulting from a transient response of the X-ray detector, and to output, based on the obtained correction-target and a model that outputs data in which component deterioration resulting from a transient response is reduced based on an input of data that includes component deterioration resulting from a transient response, corrected data in which the component deterioration resulting from the transient response of the X-ray detector is reduced.

公开(公告)号：US11207037B2

公开(公告)日：2021-12-28

申请号：US16878663

申请日：2020-05-20

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Go Kawata ,  Hiroaki Nakai

IPC: A61B6/03 ,  A61B6/00

Abstract: A radiation detector according to an embodiment includes a sensor, an electronic circuitry, a switch, and a control circuitry. The sensor configured to be formed of plural electrodes and detect radiation. Based on signals output from the electrodes, the electronic circuitry configured to output digital data. The switch configured to be provided between each of the electrodes and the electronic circuitry. The control circuitry configured to control the switch, based on a positional relation between the plural electrodes and an anti-scatter grid.

公开(公告)号：US11076823B2

公开(公告)日：2021-08-03

申请号：US16021951

申请日：2018-06-28

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Emi Tamura ,  Hiroaki Miyazaki ,  Hiroaki Nakai ,  Toshiyuki Ono

IPC: A61B6/03 ,  A61B6/00

Abstract: An X-ray CT apparatus according to one embodiment includes a photon counting detector and a processing circuitry. The photon counting detector includes a plurality of detecting elements configured to detect X-rays. The processing circuitry is configured to set a control parameter corresponding to a position of each detecting element of the plurality of detecting elements in the photon counting detector.

公开(公告)号：US10969503B2

公开(公告)日：2021-04-06

申请号：US16540147

申请日：2019-08-14

Applicant: Canon Medical Systems Corporation

Inventor： Hiroaki Nakai ,  Hiroaki Miyazaki ,  Tooru Kato ,  Mikihito Hayashi ,  Naoki Sugihara

IPC: H01L27/146 ,  G01T1/24

Abstract: According to one embodiment, a sensitivity correction method includes acquiring count rates for respective pixels in a photon counting detector; preparing incident dose adjustment materials for the respective pixels based on the count rates for the respective pixels; and providing the incident dose adjustment materials in a surface of the photon counting detector.

公开(公告)号：US11543543B2

公开(公告)日：2023-01-03

申请号：US17355777

申请日：2021-06-23

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Go Kawata ,  Hiroaki Nakai

IPC: G01T1/24 ,  G01T1/17

Abstract: A radiation detector according to an embodiment includes: a cathode electrode, a plurality of anode electrodes, a crystal, an anti-scatter grid, and a conductive part. The cathode electrode is provided on the radiation incident side. The plurality of anode electrodes are arranged so as to oppose the cathode electrode. The crystal is provided between the cathode electrode and the plurality of anode electrodes and configured to convert incident radiation into electrons. The conductive part is provided between the plurality of anode electrodes and has a conductivity higher than that of the crystal. The anti-scatter grid is provided on the radiation incident side of the cathode electrode so as to oppose the conductive part via the crystal, while being arranged in a first direction.