公开(公告)号：US20190015056A1

公开(公告)日：2019-01-17

申请号：US16066568

申请日：2015-12-28

Applicant: SHIMADZU CORPORATION

Inventor： Shota SATO ,  Wataru TAKAHASHI ,  Michel DARGIS ,  Takihito SAKAI ,  Keiichi GOTO ,  Sebastien MATTE

IPC: A61B6/12 ,  A61B6/00 ,  G06K9/46

Abstract: A radiography apparatus sequentially determines, on the basis of the positions of markers as time-sequential feature points (of a plurality of frames), positions at which the markers in the frames are displayed. This makes it possible to display a moving object while the position, direction and size thereof are properly set. Another advantage is that when a plurality of markers are extracted, information relating to the direction and size of the object is retained and the proximal and distal directions of the object and the length of a device (e.g., stent) can be intuitively determined from an image. Since positioning is performed using the plurality of positions of markers and the plurality of display positions, the position and direction of a corrected image to be finally displayed can also be set properly.

公开(公告)号：US20190240510A1

公开(公告)日：2019-08-08

申请号：US15887617

申请日：2018-02-02

Applicant: SHIMADZU CORPORATION

Inventor： Michel DARGIS ,  Frederic HUDON ,  Wataru TAKAHASHI ,  Kodai NAGAE

IPC: A61N5/10 ,  A61B6/00

Abstract: A radiation fluoroscopy apparatus detects a marker and includes a control element, an image generation element 61 that generates an image including an embedded marker inside the body of the subject based on a transmitted X-ray. A device candidate detection element 62 detects the candidate of the marker, the local structure detection element 63 detects the local structure in the target region in a proximity of the candidate point of the marker, the device determination element 64 determines whether the local structure is the device such as, the marker or not, the device location acquisition element 66 acquires the gravity center coordinate of the local structure, and the device tracking element 67 tracks the marker based on the location of the marker in each frame.

公开(公告)号：US20180310905A1

公开(公告)日：2018-11-01

申请号：US15962488

申请日：2018-04-25

Applicant: Shimadzu Corporation

Inventor： Koki YOSHIDA ,  Takanori YOSHIDA ,  Michel DARGIS

IPC: A61B6/00 ,  G06T7/00 ,  A61B6/04 ,  G06T7/246 ,  G06T3/40

CPC classification number: A61B6/5205 ,  A61B6/0492 ,  A61B6/487 ,  A61B6/503 ,  A61B6/504 ,  G06T3/403 ,  G06T7/0014 ,  G06T7/246 ,  G06T2207/10121 ,  G06T2207/30048 ,  G06T2207/30204

Abstract: This X-ray imaging apparatus is equipped with an image processing unit. The image processing unit obtains a first image with a marker reference position set in a first X-ray image and generate a second image in which a virtual marker image is superimposed at a corresponding position in a second X-ray image reflecting the change of a relative position from the marker reference position with respect to the second X-ray image different from the first X-ray image.

公开(公告)号：US20200245964A1

公开(公告)日：2020-08-06

申请号：US16652888

申请日：2017-10-03

Applicant: Shimadzu Corporation

Inventor： Wataru TAKAHASHI ,  Hidetaka TAKEZAWA ,  Michel DARGIS

IPC: A61B6/00 ,  G16H30/40 ,  A61B6/02 ,  A61B6/03

Abstract: This radiographic imaging apparatus (100) is provided with a control unit (5) configured to associate a projection image (70) in which at least a part of a post-removal projection image (70a) in which a contrast agent image (Ba) has been removed and at least a part of a fluoroscopic image (20) are most similar.

公开(公告)号：US20200151856A1

公开(公告)日：2020-05-14

申请号：US16604229

申请日：2018-04-09

Applicant: Shimadzu Corporation

Inventor： Michel DARGIS ,  Takanori YOSHIDA ,  Keiichi TANNO

IPC: G06T5/00 ,  G06T11/60 ,  G06T5/50 ,  A61B6/00 ,  A61B6/12

Abstract: An image processor (13) of an X-ray imaging apparatus (100) is configured to be switchable to a full period image composition mode in which a composite image (M) is generated by superimposing images in an entirety of an image generation period and a partial period image composition mode in which the composite image is generated by superimposing the images in a part of the image generation period.

公开(公告)号：US20190060672A1

公开(公告)日：2019-02-28

申请号：US16107368

申请日：2018-08-21

Applicant: SHIMADZU CORPORATION

Inventor： Wataru TAKAHASHI ,  Michel DARGIS ,  Shinichiro MORI

IPC: A61N5/10 ,  A61B6/12 ,  A61B6/00

Abstract: A radiotherapy tracking apparatus for tracking a position of a specific region with markerless tracking even when visual recognition of the specific region of the subject is poor and for eliminating preliminary work such as preparation of a template. A control element comprises a DRR image generation element, a phase-based position calculation element, an X-ray fluoroscopic image obtaining element, a phase adjuster, a frame-based position calculation element, a gating element and a memory storage. The frame-based position calculation element calculates the position of the specific region of the subject in the X-ray fluoroscopic image having the plurality of frames frame-by-frame based on the DRR image adjusted with the X-ray fluoroscopic image in the phase adjustment element and the position of the specific region calculated by the phase-based position calculation element.

公开(公告)号：US20170154416A1

公开(公告)日：2017-06-01

申请号：US15361132

申请日：2016-11-25

Applicant: SHIMADZU CORPORATION

Inventor： Michel DARGIS ,  Wataru Takahashi ,  Takanori Yoshida

IPC: G06T7/00 ,  A61B6/00

CPC classification number: A61B6/481 ,  A61B6/487 ,  A61B6/504 ,  A61B6/5235 ,  A61B6/5264 ,  G06T7/0016 ,  G06T7/33 ,  G06T7/38 ,  G06T2207/10016 ,  G06T2207/10064 ,  G06T2207/10116 ,  G06T2207/10121 ,  G06T2207/20221 ,  G06T2207/30048 ,  G06T2207/30101

Abstract: An image processing apparatus includes a current image acquisition device which acquires a current image of a subject having a structure having a periodic movement, a past image acquisition device which acquires multiple past images of the subject such that the past images captured for over one or more periods of the periodic movement are acquired, and circuitry which searches multiple feature points on each past image and the current image, associates the feature points on the current image and the feature points on each of the past images, calculates, for each of the past images, a degree of similarity between the feature points on each of the past images and the feature points on the current image based on association, and identifies to which one of the past images the current image corresponds such that at which phase of the periodic movement the current image is positioned is estimated.