公开(公告)号：US20210251594A1

公开(公告)日：2021-08-19

申请号：US17178758

申请日：2021-02-18

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Tooru KATO ,  Hiroaki MIYAZAKI

IPC: A61B6/00 ,  G01T1/17 ,  A61B6/03

Abstract: An X-ray detector according to an embodiment is an X-ray detector configured by arranging a plurality of detector modules, and includes a first detector module, a second detector module, a voltage application circuit, a first transmission circuit, and a first reception circuit. The second detector module is adjacent to the first detector module among the detector modules. The voltage application circuit is disposed in each of the detector modules, and applies a voltage to a plurality of detection elements included in each of the detector modules. The first transmission circuit is disposed in the first detector module, and transmits a signal based on the voltage from the voltage application circuit of the first detector module. The first reception circuit is disposed in the second detector module, and receives a signal transmitted from the first transmission circuit.

公开(公告)号：US20210219930A1

公开(公告)日：2021-07-22

申请号：US17152866

申请日：2021-01-20

Applicant: Canon Medical Systems Corporation

Inventor： Nobuto TSUCHIYA ,  Tooru KATO

IPC: A61B6/00 ,  A61B6/03

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a photon counting detector, and processing circuitry. The X-ray tube radiates X-rays. The photon counting detector detects the
X-rays radiated from the X-ray tube and transmitted through a subject. The processing circuitry adjusts a temperature adjustment amount used for regulating a temperature of the photon counting detector according to an imaging mode.

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.

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：US20190021687A1

公开(公告)日：2019-01-24

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

CPC classification number: A61B6/4488 ,  A61B6/032 ,  A61B6/035 ,  A61B6/06 ,  A61B6/4035 ,  A61B6/4233 ,  A61B6/4241 ,  A61B6/5205 ,  A61B6/54

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.