公开(公告)号：US20210236073A1

公开(公告)日：2021-08-05

申请号：US17162043

申请日：2021-01-29

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Go KAWATA ,  Hiroaki NAKAI

IPC: A61B6/00 ,  G01T1/20

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：US20220003886A1

公开(公告)日：2022-01-06

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.

公开(公告)号：US20210052236A1

公开(公告)日：2021-02-25

申请号：US16987749

申请日：2020-08-07

Applicant: Canon Medical Systems Corporation

Inventor： Hiroaki NAKAI

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

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：US20200367836A1

公开(公告)日：2020-11-26

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：US20200064498A1

公开(公告)日：2020-02-27

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: 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：US20190000409A1

公开(公告)日：2019-01-03

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: A61B6/00 ,  A61B6/03

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 of the detecting elements in the photon counting detector.

公开(公告)号：US20180300909A1

公开(公告)日：2018-10-18

申请号：US15951693

申请日：2018-04-12

Applicant: Canon Medical Systems Corporation

Inventor： Emi TAMURA ,  Hiroaki NAKAI

IPC: G06T11/00 ,  G01T1/29 ,  A61B6/00 ,  A61B6/03 ,  G06T5/50 ,  G06T7/00

CPC classification number: G06T11/008 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/5205 ,  G01T1/2985 ,  G06T5/50 ,  G06T7/0012 ,  G06T2207/10081 ,  G06T2207/30004

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 detecting elements each of which outputs signals corresponding to numbers of photons that are counted. The processing circuitry generates pieces of first projection data on a basis of the signals from the plurality of detecting elements. The processing circuitry generate second projection data by bundling together, in spatial units, pieces of first projection data from a predetermined number of detecting elements among the plurality of detecting elements. The processing circuitry reconstructs a material decomposition image on a basis of the second projection data.

公开(公告)号：US20180211417A1

公开(公告)日：2018-07-26

申请号：US15877840

申请日：2018-01-23

Applicant: Canon Medical Systems Corporation

Inventor： Hiroaki MIYAZAKI ,  Hiroaki NAKAI ,  Naoki SUGIHARA ,  Tooru KATO ,  Mikihito HAYASHI ,  Emi TAMURA

IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00 ,  G01N23/046 ,  G06T7/11 ,  G06T7/136

CPC classification number: G06T11/005 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/461 ,  A61B6/5205 ,  G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G06T7/11 ,  G06T7/136 ,  G06T11/006 ,  G06T2207/10081

Abstract: An X-ray CT apparatus according to an embodiment includes an X-ray tube, a photon counting detector, and a processing circuitry. The X-ray tube is configured to generate X-rays. The photon counting detector includes a plurality of detecting elements each configured to output a signal in response to any of the X-rays becoming incident thereto after having passed through an examined subject. The processing circuitry is configured to determine, within a reconstruction region, a first region on which a spectrum reconstructing process is to be performed and a second region on which an energy integral reconstructing process is to be performed, on the basis of output values related to energy spectra based on the signals output by the detecting elements. The processing circuitry is configured to generate an image on the basis of the determined first region and the determined second region.