公开(公告)号：US20230148976A1

公开(公告)日：2023-05-18

申请号：US18055544

申请日：2022-11-15

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akihiro ISHIDA ,  Yasuo SAITO

IPC: A61B6/03 ,  G01T1/24

CPC classification number: A61B6/032 ,  G01T1/241 ,  A61B6/4021

Abstract: A direct-conversion X-ray detector according to an embodiment includes a plurality of anode electrodes, at least one cathode electrode, and electric-field forming circuitry. The anode electrodes are aligned in a cone angle direction of an incident X-ray. The cathode electrode is positioned on an incident side of an X-ray relative to the anode electrodes, and that opposes the anode electrodes. The electric-field forming circuitry configured to form an electric field in a direction based on a cone angle of the X-ray, between the anode electrodes and the cathode electrode.

公开(公告)号：US20240188919A1

公开(公告)日：2024-06-13

申请号：US18530308

申请日：2023-12-06

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yasuo SAITO

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/40 ,  A61B6/42

CPC classification number: A61B6/542 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4241

Abstract: An X-ray CT device of an embodiment includes processing circuitry. The processing circuitry acquires data corresponding to energy when X-rays radiated by an X-ray tube are transmitted through a subject. The processing circuitry adjusts conditions including first and second conditions for the data when the data is acquired. The processing circuitry switches the condition between the first condition and the second condition during a fluoroscopic imaging manipulation performed by radiating the X-rays to the subject. The processing circuitry bundles the data discriminated into some of a plurality of energy bins.

公开(公告)号：US20240188910A1

公开(公告)日：2024-06-13

申请号：US18530337

申请日：2023-12-06

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yasuo SAITO

IPC: A61B6/40 ,  A61B6/00 ,  A61B6/03

CPC classification number: A61B6/405 ,  A61B6/032 ,  A61B6/481

Abstract: An X-ray CT device of an embodiment includes processing circuitry. The processing circuitry acquires data corresponding to energy when X-rays radiated by an X-ray tube are transmitted through a subject. The processing circuitry adjusts conditions including first and second conditions for the data when the data is acquired. The processing circuitry switches the condition from the first condition to the second condition when an injection state of a contrast agent injected into the subject satisfies a predetermined condition. The processing circuitry bundles the data discriminated into some of a plurality of energy bins.

公开(公告)号：US20240099670A1

公开(公告)日：2024-03-28

申请号：US18475375

申请日：2023-09-27

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yasuo SAITO

IPC: A61B6/03 ,  A61B6/00

CPC classification number: A61B6/032 ,  A61B6/4241

Abstract: An X-ray Computed Tomography (CT) apparatus according to an embodiment includes storage circuitry and processing circuitry. The storage circuitry is configured to store therein a table keeping first information about an energy spectrum of X-rays in correspondence with second information about a focal point position of an X-ray tube. The processing circuitry is configured to obtain third information about an energy spectrum of X-rays emitted from the X-ray tube. The processing circuitry is configured to specify a corrected focal point position on the basis of the third information and the table.

公开(公告)号：US20240188912A1

公开(公告)日：2024-06-13

申请号：US18528883

申请日：2023-12-05

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yasuo SAITO

IPC: A61B6/00 ,  A61B6/03 ,  G01T1/17

CPC classification number: A61B6/4241 ,  A61B6/035 ,  A61B6/4435 ,  A61B6/54 ,  G01T1/17

Abstract: An X-ray CT apparatus of an embodiment includes a gantry and a control device held by the gantry. The control device includes processing circuitry. The processing circuitry is configured to collect data corresponding to energy of a material, adjust conditions for the data at the time of collecting the data, bundle the data distinguished in some of a plurality of energy bins, aggregate the collected data and the bundled data, and switch between the aggregation of the collected data and the aggregation of the bundled data.

公开(公告)号：US20220003881A1

公开(公告)日：2022-01-06

申请号：US17304951

申请日：2021-06-29

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA ,  Koichi MIYAMA ,  Yasuo SAITO

IPC: G01T1/164 ,  A61B6/03 ,  G21K1/02

Abstract: A correction X-ray detector according to an embodiment includes a plurality of detector elements configured to detect an X-ray, and processing circuitry. The processing circuitry is configured to acquire a plurality of output values respectively corresponding to the plurality of the plurality of detector elements. The processing circuitry is further configured to determine the detector elements to be used in generating correction data based on the plurality of output values.

公开(公告)号：US20240074715A1

公开(公告)日：2024-03-07

申请号：US18461692

申请日：2023-09-06

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Hiroaki MIYAZAKI ,  Yasuo SAITO

IPC: A61B6/03 ,  A61B6/00 ,  G06T7/00 ,  G06T11/00

CPC classification number: A61B6/032 ,  A61B6/4241 ,  A61B6/5205 ,  G06T7/0012 ,  G06T11/005 ,  G06T2207/10081

Abstract: An X-ray CT apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires first data in a first mode without coincidence counting correction. The processing circuitry restores, from the first data, second data having a higher spatial resolution than the first data.

公开(公告)号：US20190080491A1

公开(公告)日：2019-03-14

申请号：US16127779

申请日：2018-09-11

Applicant: Canon Medical Systems Corporation

Inventor： Yasuo SAITO ,  Shinsuke Tsukagoshi

IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00 ,  G16H30/40

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes data acquisition circuitry and processing circuitry. The data acquisition circuitry is configured to acquire projection data of a first area and projection data of a second area, the first area being an area where the projection data is complete for one rotation, the second area being an area where the projection data is obtained for an angle smaller than the one rotation. The processing circuitry is configured to perform, for at least part of the first area, reconstruction processing using the projection data corresponding to a partial angle among the projection data and to perform, for the second area, reconstruction processing using the projection data of a smaller acquisition range that is smaller than one rotation.