公开(公告)号：US20220334267A1

公开(公告)日：2022-10-20

申请号：US17717563

申请日：2022-04-11

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA

IPC: G01T1/16 ,  A61B6/00 ,  A61B6/03

Abstract: A radiation detector module of an embodiment includes a radiation detector, a first electrode, a second electrode, and a mark. The radiation detector includes an incident surface and is configured to detect radiation incident from the incident surface. The first electrode is provided on the side of the incident surface of the radiation detector. The second electrode is provided to face the first electrode through the radiation detector. The mark is provided on at least one of the incident surface of the radiation detector and the first electrode.

公开(公告)号：US20240293094A1

公开(公告)日：2024-09-05

申请号：US18593329

申请日：2024-03-01

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA

IPC: A61B6/42 ,  A61B6/03

CPC classification number: A61B6/4241 ,  A61B6/035 ,  A61B6/4233

Abstract: A photon counting CT apparatus of an embodiment has a detector module including a semiconductor detector and first processing circuitry configured to process detection data detected by the semiconductor detector. The first processing circuitry is configured to generate heat by performing a pseudo operation during a period in which X-ray exposure is stopped.

公开(公告)号：US20230251391A1

公开(公告)日：2023-08-10

申请号：US18298143

申请日：2023-04-10

Applicant: Canon Medical Systems Corporation

Inventor： Akira NISHIJIMA

IPC: G01T1/20 ,  H03M1/12

CPC classification number: G01T1/20184 ,  H03M1/12 ,  G01N23/046

Abstract: According to one embodiment, a converter array includes a first substrate, multiple sets of a plurality of analog-digital converters and a switch. The multiple sets are arranged on the first substrate in array. The switch is configured to switch a connection relationship between the plurality of analog-digital converters to process signals from photodiodes smaller in number than the analog-digital converters.

公开(公告)号：US20230110667A1

公开(公告)日：2023-04-13

申请号：US17820446

申请日：2022-08-17

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： James Lawrence BEGELMAN ,  Kevin ZIMMERMAN ,  Thomas LABNO ,  John BAUMGART ,  Akira NISHIJIMA ,  Takashi OHSHIMA

IPC: A61B6/03 ,  A61B6/00

Abstract: A computer-tomography (CT) imaging system, comprising an imaging data acquisition system. The imaging data acquisition system includes a detector section, an aggregation section, and a storage section. The detection section includes a plurality of detector elements configured to convert radiation into electric signals. The aggregation section aggregates imaging data carried by the electric signals from the detector section. The storage section is arranged in a manner corresponding to the detector elements regarding an output from the detector section and an input to the aggregation section. The storage section includes a predetermined number of non-volatile memories configured to store the imaging data from the corresponding detector elements.

公开(公告)号：US20210038182A1

公开(公告)日：2021-02-11

申请号：US16983420

申请日：2020-08-03

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA

IPC: A61B6/00 ,  A61B6/03 ,  G01R31/382

Abstract: An X-ray CT apparatus of an embodiment includes an X-ray tube, an X-ray detector, a data processor, a battery, a rotating body, and processing circuitry. The X-ray detector is configured to detect X rays output from the X-ray tube. The data processor is configured to process a signal output from the X-ray detector. The battery is configured to supply electric power to the data processor. The rotating body is configured to rotatably support the X-ray tube and the X-ray detector, the X-ray tube facing the X-ray detector, and further to rotatably support the data processor and the battery. The processing circuitry is configured to monitor a remaining capacity of the battery, and determine a scanning condition on the basis of the remaining capacity.

公开(公告)号：US20200037967A1

公开(公告)日：2020-02-06

申请号：US16531308

申请日：2019-08-05

Applicant: Canon Medical Systems Corporation

Inventor： Akira NISHIJIMA

IPC: A61B6/03 ,  A61B6/00

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray detection element, an A/D convertor, a readout switch, and readout control circuitry. The X-ray detection element outputs an electric signal corresponding to a detected X-ray. The A/D convertor A/D-converts the electric signal. The readout switch switches a connection between the X-ray detection element and the A/D convertor. The readout control circuitry acquires, as offset data, data which is output by the A/D convertor in a state where the readout switch is OFF instead of projection data which is output by the A/D convertor according to the electric signal in a state where the readout switch is ON, in a view during a scan.

公开(公告)号：US20240298994A1

公开(公告)日：2024-09-12

申请号：US18596188

申请日：2024-03-05

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/42 ,  G01T1/24

CPC classification number: A61B6/542 ,  A61B6/4241 ,  G01T1/24 ,  A61B6/032

Abstract: An X-ray detector according to an embodiment is an X-ray detector of photon counting type including a plurality of detection elements and a voltage supply device configured to supply the detection elements with a voltage for reading out electric charges accumulated in the detection elements irradiated with X-rays, and the X-ray detector includes processing circuitry configured to: identify target elements from among the detection elements based on information that is acquired during a CT scan using the X-ray detector, each of the target elements causing a large current to flow through a circuit between the target element and the voltage supply device; and stop voltage supply from the voltage supply device to at least some of the target elements.

公开(公告)号：US20240298983A1

公开(公告)日：2024-09-12

申请号：US18596215

申请日：2024-03-05

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA

IPC: A61B6/42 ,  A61B6/00 ,  A61B6/03

CPC classification number: A61B6/4241 ,  A61B6/035 ,  A61B6/54

Abstract: An X-ray CT apparatus according to an embodiment includes: an X-ray detector of photon counting type including a plurality of detection elements and a voltage supply device configured to supply the detection elements with a voltage for reading out electric charges accumulated in the detection elements irradiated with X-rays; and processing circuitry configured to identify a target element from among the detection elements based on information acquired in advance, the target element causing a large current to flow through a circuit between the target element and the voltage supply device and compensate for a change of the voltage supplied from the voltage supply device to the target element.

公开(公告)号：US20210282727A1

公开(公告)日：2021-09-16

申请号：US17167229

申请日：2021-02-04

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Akira NISHIJIMA

IPC: A61B6/06 ,  G21K1/02 ,  G21K1/10 ,  A61B6/00

Abstract: A collimator according to an embodiment is a collimator for use in an X-ray CT apparatus and includes a collimator module and resin. The collimator module includes a first scattered ray eliminating part and a second scattered ray eliminating part. The resin is provided between the first scattered ray eliminating part and the second scattered ray eliminating part and is configured to hold the first scattered ray eliminating part and the second scattered ray eliminating part.

公开(公告)号：US20230233163A1

公开(公告)日：2023-07-27

申请号：US18158492

申请日：2023-01-24

Applicant: Canon Medical Systems Corporation

Inventor： Akira NISHIJIMA

IPC: A61B6/00

CPC classification number: A61B6/40 ,  A61B6/4208

Abstract: A tube voltage control circuitry switches a tube voltage applied to an X-ray tube between a first tube voltage and a second tube voltage of lower value than the first tube voltage. A first signal generating circuitry generates a first switching signal at a first time interval. A view switching circuitry switches a view based on the first switch signal. A data acquisition circuitry performs data acquisition for each view via an X-ray detector. A second signal generating circuitry generates a second switch signal at a second time interval shorter than the first time interval. A gain switching circuitry switches gains of the data acquisition circuitry based on the second switch signal.