公开(公告)号：US20190328345A1

公开(公告)日：2019-10-31

申请号：US16394591

申请日：2019-04-25

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Shumpei OHASHI ,  Yoshiaki IIJIMA ,  Kunio SHIRAISHI

IPC: A61B6/00

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to sequentially obtain X-ray images. The processing circuitry is configured to sequentially generate average images by using the obtained plurality of X-ray images, in parallel to the obtainment of the X-ray images. The processing circuitry is configured to sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.

公开(公告)号：US20230351647A1

公开(公告)日：2023-11-02

申请号：US18191166

申请日：2023-03-28

Applicant: Canon Medical Systems Corporation

Inventor： Jumpei OGASAWARA ,  Kunio SHIRAISHI ,  Hajime YOSHIDA ,  Akihito TAKAHASHI ,  Yasuto HAYATSU

IPC: A61B6/00 ,  G06T11/00

CPC classification number: G06T11/005 ,  A61B6/4441 ,  G06T2210/41

Abstract: According to one embodiment, an X-ray diagnostic apparatus including processing circuitry. The processing circuitry is configured to cause an X-ray detector to read a signal in a non-destructive readout before termination of X-ray exposure, the signal being accumulated in an X-ray detection element; cause the X-ray detector to read the signal in a destructive readout after termination of X-ray exposure; acquire first projection data generated based on the signal read in the non-destructive readout and acquire second projection data generated based on the signal read in the destructive readout; estimate, based on the second projection data, a saturation region in which saturation is occurring; and replace a signal in the saturation region of the second projection data with a signal in the saturation region of the first projection data.

公开(公告)号：US20240303780A1

公开(公告)日：2024-09-12

申请号：US18181635

申请日：2023-03-10

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yi HU ,  Shijie LI ,  John BAUMGART ,  Joseph MANAK ,  Kunio SHIRAISHI ,  Saki HASHIMOTO

IPC: G06T5/00

CPC classification number: G06T5/70 ,  G06T5/77 ,  G06T2207/10016 ,  G06T2207/10081 ,  G06T2207/10121 ,  G06T2207/20021 ,  G06T2207/20081 ,  G06T2207/20084

Abstract: A medical image processing method, an X-ray diagnostic apparatus, and a method of generating a learned model includes receiving first X-ray image data, inputting the first X-ray image data to a trained model, outputting, from the trained model, an X-ray image having an image quality higher than an image quality of the first X-ray image data. The learned model was trained using contrastive learning using second X-ray image data as input data, third X-ray image data and fourth X-ray image data as label data, the third X-ray image data being negative label data having worse image quality than the second X-ray image data, and the fourth image data being positive label data having better image quality than the second X-ray image data.

公开(公告)号：US20240081770A1

公开(公告)日：2024-03-14

申请号：US18459491

申请日：2023-09-01

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Jumpei OGASAWARA ,  Hajime YOSHIDA ,  Yasuto HAYATSU ,  Kunio SHIRAISHI

IPC: A61B6/00 ,  A61B6/03 ,  G06T5/00 ,  G06T7/00 ,  G06T11/00 ,  G16H30/40

CPC classification number: A61B6/5258 ,  A61B6/032 ,  A61B6/4085 ,  G06T5/002 ,  G06T7/0012 ,  G06T11/005 ,  G16H30/40 ,  G06T2207/10081 ,  G06T2207/30004

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires a plurality of projection data based on an output signal from an X-ray detector that rotates around a subject, performs reconstruction filter processing on the plurality of acquired projection data, the reconstruction filter processing being included in reconstruction regarding the plurality of projection data, generates correction information on a sensitivity difference area formed in the plurality of projection data due to differences in sensitivity of the X-ray detector, on the basis of a processing result of the reconstruction filter processing, performs correction processing on the plurality of projection data on the basis of the correction information, and performs reconstruction processing including the reconstruction filter processing on the plurality of projection data subjected to the correction processing.

公开(公告)号：US20230165554A1

公开(公告)日：2023-06-01

申请号：US18056904

申请日：2022-11-18

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Kunio SHIRAISHI ,  Masanori MATSUMOTO ,  Hisato TAKEMOTO ,  Shingo OGURA

IPC: A61B6/00

CPC classification number: A61B6/48 ,  A61B6/4441 ,  G06T2207/30101

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured: to perform registration between one contrast image and each of a plurality of mask images; to calculate a plurality of matching degrees between the plurality of mask images and the one contrast image registered with each other, on the basis of the plurality of mask images and the one contrast image registered with each other; and to determine a difference between one of the mask images corresponding to a maximum matching degree among the plurality of matching degrees and the one contrast image, as one subtraction image corresponding to the one contrast image.

公开(公告)号：US20200334815A1

公开(公告)日：2020-10-22

申请号：US16853855

申请日：2020-04-21

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Hirona OIKAWA ,  Shingo ABE ,  Kunio SHIRAISHI ,  Toshiya WAKU ,  Shumpei OHASHI ,  Akihito TAKAHASHI ,  Saki HASHIMOTO ,  Jumpei OGASAWARA

IPC: G06T7/00 ,  G06T7/215 ,  G06T7/73 ,  G16H30/20

Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry specifies, before position alignment between a first X-ray image and a second X-ray image which is acquired with a device inserted, a device area candidate in the second X-ray image as a candidate of an area where the device appears. The processing circuitry performs the position alignment using first processing of removing the specified device area candidate or second processing of reducing a contribution of the specified device area candidate.

公开(公告)号：US20200315557A1

公开(公告)日：2020-10-08

申请号：US16836988

申请日：2020-04-01

Applicant: Canon Medical Systems Corporation

Inventor： Takuya AIDA ,  Kunio SHIRAISHI

IPC: A61B6/00

Abstract: According to one embodiment, an X-ray diagnosis apparatus includes an X-ray tube, an X-ray detector, an operating unit, and processing circuitry. The processing circuitry determines a focal-spot size of X-rays in second moving picture imaging after first moving picture imaging, based on an output of the X-ray detector in the first moving picture imaging, and determines a focal-spot size of X-rays in third moving picture imaging after the second moving picture imaging, based on an output of the X-ray detector in the second moving picture imaging.