WO2019151250A1 - Dispositif d'imagerie par rayons x et procédé de synthèse d'images de tomosynthèse - Google Patents

Dispositif d'imagerie par rayons x et procédé de synthèse d'images de tomosynthèse Download PDF

Info

Publication number
WO2019151250A1
WO2019151250A1 PCT/JP2019/002969 JP2019002969W WO2019151250A1 WO 2019151250 A1 WO2019151250 A1 WO 2019151250A1 JP 2019002969 W JP2019002969 W JP 2019002969W WO 2019151250 A1 WO2019151250 A1 WO 2019151250A1
Authority
WO
WIPO (PCT)
Prior art keywords
ray
distributed
ray imaging
imaging apparatus
tubes
Prior art date
Application number
PCT/JP2019/002969
Other languages
English (en)
Japanese (ja)
Inventor
秀憲 監物
均 桝谷
Original Assignee
ナノックス イメージング ピーエルシー
株式会社ナノックスジャパン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ナノックス イメージング ピーエルシー, 株式会社ナノックスジャパン filed Critical ナノックス イメージング ピーエルシー
Priority to CN201980011378.2A priority Critical patent/CN111683601A/zh
Priority to JP2019569135A priority patent/JPWO2019151250A1/ja
Publication of WO2019151250A1 publication Critical patent/WO2019151250A1/fr

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/025—Tomosynthesis
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/52—Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode

Definitions

  • the present invention relates to an X-ray imaging apparatus and a tomosynthesis image synthesis method.
  • An X-ray imaging apparatus that performs tomosynthesis imaging to obtain a tomographic image of a patient is known.
  • imaging is performed a plurality of times while moving the X-ray tube (for example, Patent Document 1).
  • the inventors of the present application arrange a plurality of X-ray tubes in advance and perform imaging while sequentially switching these by a control signal.
  • the inventor of the present application calls such a system in which a plurality of X-ray tubes are arranged in advance as “distributed X-ray source”.
  • the distributed X-ray source occupies a large continuous space, it may not be adopted depending on the application.
  • the distributed X-ray source may block the flow line of the robot arm, and thus the distributed X-ray source may not be employed.
  • an object of the present invention is to provide an X-ray imaging apparatus and a tomosynthesis image synthesis method that can increase the possibility of adopting a distributed X-ray source.
  • An X-ray imaging apparatus includes a plurality of distributed X-ray sources each having a plurality of X-ray tubes arranged at a constant pitch, and the plurality of distributed X-ray sources are arranged with a space therebetween, and the space The distance between two X-ray tubes that are adjacent to each other with respect to the X-ray imaging apparatus is larger than the pitch.
  • the tomosynthesis image synthesizing method according to the present invention is based on a plurality of images taken using each of the plurality of X-ray tubes included in the plurality of distributed X-ray sources provided in the X-ray imaging apparatus. Is a method for synthesizing tomosynthesis images.
  • the robot arm can be passed between the plurality of X-ray tubes constituting the distributed X-ray source, the possibility of adopting the distributed X-ray source can be increased.
  • FIG. 1 is a figure which shows the structure of the X-ray imaging apparatus 1 by embodiment of this invention
  • (b) is typical of the electron emission part 10 provided in each cold cathode type
  • FIG. It is sectional drawing. It is a figure explaining arrangement
  • FIG. 1A is a diagram showing a configuration of an X-ray imaging apparatus 1 according to an embodiment of the present invention.
  • the X-ray imaging apparatus 1 includes a plurality of cold cathode X-ray tubes 3 constituting a distributed X-ray source and their control devices 2.
  • FIG. 1A shows only one cross-sectional view of the plurality of X-ray tubes 3 and the control device 2.
  • each X-ray tube 3 has a structure in which an electron emission unit 10, an anode unit 11, a target 12, and a focus structure 13 are arranged inside a housing 15. ing.
  • the housing 15 is a sealing member made of any one of glass, ceramics, and stainless steel.
  • the casing 15 is provided with a valve, and as needed, exhaust inside the casing 15 and gas injection into the casing 15 are performed through this valve.
  • the inside of the housing 15 is evacuated by evacuating using a vacuum pump.
  • FIG. 1B is a schematic cross-sectional view of the electron emission portion 10.
  • the electron emission portion 10 includes a cathode electrode 20, a plurality of electron emission elements 21 arranged on the upper surface of the cathode portion 20, and a gate electrode having a plurality of openings 22h arranged in a matrix. 22.
  • Each of the plurality of electron-emitting devices 21 is a Spindt-type cold cathode, and is arranged one by one in the opening 22h. The upper end of each electron-emitting device 21 is located in the opening 22h.
  • the cathode portion 20 is supplied with the ground potential GND from the control device 2, and the gate electrode 22 is supplied with the gate voltage Vg from the control device 2.
  • the anode part 11 is a metal member having an anode surface 11a arranged to face the electron emission part 10, and is specifically made of copper (Cu).
  • the positive side terminal of the power source P is connected to the anode portion 11. Therefore, when the gate electrode 22 shown in FIG. 1B is turned on, the anode portion 11, the electron emitting portion 10, A current (anode current) flows through the cathode portion 20. At this time, a plurality of electrons are emitted from each electron-emitting device 21 shown in FIG. These electrons collide with the anode surface 11 a and pass through the anode portion 11 and are absorbed by the power source P. As shown in FIG. 1A, the anode surface 11a is formed so as to be inclined with respect to an electron moving direction (a direction from left to right in the drawing).
  • the target 12 is a member made of a material that receives electrons and generates X-rays, and is arranged so as to cover a portion of the anode surface 11a where electrons emitted from each electron-emitting device 21 directly collide. Since the target 12 is disposed on the anode surface 11a, some or all of the plurality of electrons that collide with the anode surface 11a pass through the target 12, and X-rays are generated in the target 12 during the passage. . The radiation direction of the X-rays thus generated is downward in the drawing due to the inclination of the anode surface 11a.
  • the focus structure 13 is a structure having a function of correcting the trajectory of electrons emitted from the electron emission unit 10, and is arranged between the electron emission unit 10 and the target 12 arranged on the anode surface 11a.
  • the focus structure 13 has a window 13h, and electrons emitted from the electron emission unit 10 travel toward the target 12 through the window 13h.
  • a focus voltage Vf is supplied from the control device 2 to the focus structure 13.
  • the focus voltage Vf plays a role of controlling the correction amount of the electron trajectory by the focus structure 13.
  • the focus structure 13 may be divided into two or more regions. In this case, the focus position of the electron beam on the anode surface 11a can be adjusted by applying a different focus voltage Vf to each region. Become.
  • the control device 2 is a processing device that operates according to a program written in advance or an instruction from the outside, a function of supplying the ground potential GND to the cathode unit 20, a function of supplying the gate voltage Vg to the gate electrode 22, and a focus It has a function of supplying the focus voltage Vf to the structure 13.
  • the X-ray tube 3 is in operation when the supply of the gate voltage Vg to the gate electrode 22 is started under the control of the control device 2, and starts X-ray emission.
  • FIG. 2 is a diagram for explaining the arrangement of a plurality of cold cathode X-ray tubes 3 according to the present embodiment.
  • the distributed X-ray source included in the X-ray imaging apparatus 1 according to the present embodiment is divided into three distributed X-ray sources G1 to G3. These distributed X-ray sources G1 to G3 are arranged with a space SP therebetween, and are each configured with five X-ray tubes 3 arranged at a constant pitch PI1 (center distance). The specific position and size of the space SP are determined based on the size and flow line so that the robot arm used together with the X-ray imaging apparatus 1 can pass without any problem.
  • the distance PI2 (center distance) between the two X-ray tubes 3 is larger than the pitch PI1.
  • the number of distributed X-ray sources is limited to three.
  • the number of X-ray tubes 3 included in each distributed X-ray source is not limited to five.
  • the distributed X-ray sources G1 to G3 are arranged at equal intervals on an arc centered on the patient's examination site EX.
  • the X-ray tubes 3 are arranged side by side on a straight line.
  • the X-ray tubes 3 may be arranged side by side on an arc centered on the patient's examination site EX in each of the distributed X-ray sources G1 to G3.
  • the X-ray irradiation direction of each X-ray tube 3 is adjusted in advance to the direction of the patient's test site EX.
  • an X-ray detector is disposed on the opposite side of each cold cathode X-ray tube 3 across the test site EX.
  • One detector may be provided, or may be provided for each X-ray tube 3.
  • FIG. 3 is a diagram showing a control method of the X-ray imaging apparatus 1 shown in FIG.
  • the horizontal axis represents time t
  • the vertical axis collectively represents the gate voltage Vg supplied to the gate electrode 22 of each X-ray tube 3.
  • numerals 1 to 15 shown in the figure indicate the serial numbers of the 15 X-ray tubes 3 shown in FIG.
  • the control device 2 of the X-ray imaging apparatus 1 shown in FIG. 2 is configured to sequentially activate the gate voltage Vg supplied to the gate electrodes 22 of the 15 X-ray tubes 3 as shown in FIG.
  • Each X-ray tube 3 is in an operating state by turning on the gate electrode 22 while the corresponding gate voltage Vg is in an active state.
  • the supply of the gate voltage Vg to each X-ray tube 3 is preferably performed at equal intervals so that two or more gate voltages Vg are not activated simultaneously.
  • control device 2 By the operation of the control device 2 as described above, 15 images captured using each of the 15 X-ray tubes 3 are obtained.
  • the control device 2 synthesizes a tomosynthesis image based on the plurality of images thus obtained. This makes it possible to obtain a 3D tomographic image of the test site EX.
  • the robot arm is passed through the space SP. Is possible. Therefore, it becomes possible to use a distributed X-ray source that could not be used conventionally with a surgical robot.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Public Health (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Veterinary Medicine (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Toxicology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • X-Ray Techniques (AREA)

Abstract

Le problème abordé par la présente invention est de pourvoir à un dispositif d'imagerie par rayons X qui accroît la possibilité qu'une source de rayons X distribuée puisse être adoptée, et à un procédé de synthèse d'images de tomosynthèse. La solution selon l'invention porte sur un dispositif d'imagerie par rayons X qui comporte de multiples sources de rayons X distribuées G1-G3, ayant chacune de multiples tubes de rayons X 3 agencés à un pas fixe PI1, où les sources de rayons X distribuées G1-G3 sont agencées séparées par un espace SP, et la distance PI2 entre deux tubes à rayons X 3 qui sont adjacents mais séparés par l'espace SP est supérieure au pas PI1. <u /> <u />
PCT/JP2019/002969 2018-01-31 2019-01-29 Dispositif d'imagerie par rayons x et procédé de synthèse d'images de tomosynthèse WO2019151250A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980011378.2A CN111683601A (zh) 2018-01-31 2019-01-29 X射线拍摄装置和断层合成图像的合成方法
JP2019569135A JPWO2019151250A1 (ja) 2018-01-31 2019-01-29 Ｘ線撮影装置及びトモシンセシス画像の合成方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862624458P 2018-01-31 2018-01-31
US62/624,458 2018-01-31

Publications (1)

Publication Number Publication Date
WO2019151250A1 true WO2019151250A1 (fr) 2019-08-08

Family

ID=67478392

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/002969 WO2019151250A1 (fr) 2018-01-31 2019-01-29 Dispositif d'imagerie par rayons x et procédé de synthèse d'images de tomosynthèse

Country Status (3)

Country Link
JP (1) JPWO2019151250A1 (fr)
CN (1) CN111683601A (fr)
WO (1) WO2019151250A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5546408A (en) * 1978-09-29 1980-04-01 Toshiba Corp X-ray device
JP2006524809A (ja) * 2003-04-25 2006-11-02 シーエックスアール リミテッド Ｘ線走査装置の熱負荷を制御する制御手段
US20120195403A1 (en) * 2011-01-31 2012-08-02 University Of Massachusetts Tomosynthesis imaging

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010062541A1 (de) * 2010-12-07 2012-06-14 Siemens Aktiengesellschaft Mammografieanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5546408A (en) * 1978-09-29 1980-04-01 Toshiba Corp X-ray device
JP2006524809A (ja) * 2003-04-25 2006-11-02 シーエックスアール リミテッド Ｘ線走査装置の熱負荷を制御する制御手段
US20120195403A1 (en) * 2011-01-31 2012-08-02 University Of Massachusetts Tomosynthesis imaging

Also Published As

Publication number Publication date
JPWO2019151250A1 (ja) 2021-02-18
CN111683601A (zh) 2020-09-18

Similar Documents

Publication Publication Date Title
RU2635372C2 (ru) Многокатодный распределенный рентгеновский аппарат с управлением катодом и устройство компьютерной томографии, имеющее упомянутый аппарат
US8989351B2 (en) X-ray source with a plurality of electron emitters
JP6526014B2 (ja) Ｘ線装置及び該ｘ線装置を有するｃｔデバイス
US7197116B2 (en) Wide scanning x-ray source
JP4599073B2 (ja) Ｘ線断層撮影装置
WO2015039602A1 (fr) Dispositif à rayons x et équipement de tomodensitométrie comportant un dispositif à rayons x
KR100895067B1 (ko) 개별 어드레싱이 가능한 대면적 ｘ 선 시스템
JP2005222950A (ja) 静止ｃｔシステムのためのエミッタアレイ構成
JP2007095689A (ja) 冷電子源によるｘ線発生装置
US9517043B2 (en) Multi-source radiation generator and radiography system
JPH0773832A (ja) 陽極を有するレントゲン管
US20110255667A1 (en) LOW BIAS mA MODULATION FOR X-RAY TUBES
US6907110B2 (en) X-ray tube with ring anode, and system employing same
JP2012079695A (ja) 電子ビーム・システムを動作させる方法及びシステム
WO2019151251A1 (fr) Procédé et dispositif de commande d&#39;un tube à rayons x
US10499862B2 (en) Panoramic X-ray imaging apparatus
US11380510B2 (en) X-ray tube and a controller thereof
WO2019151250A1 (fr) Dispositif d&#39;imagerie par rayons x et procédé de synthèse d&#39;images de tomosynthèse
WO2019151249A1 (fr) Procédé de commande d&#39;un dispositif d&#39;imagerie par rayons x
JP2010015989A (ja) 回転陽極型ｘ線発生器における電子源の迅速な交換のための陰極アセンブリ
US10991539B2 (en) X-ray tube and a conditioning method thereof
JPH0415982B2 (fr)
US12058800B2 (en) CNT X-ray tube control system with dummy load
US11212902B2 (en) Multiplexed drive systems and methods for a multi-emitter X-ray source
WO2021173122A1 (fr) Systèmes d&#39;attaque multiplexés et procédés pour une source de rayons x à émetteurs multiples

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19747410

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019569135

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19747410

Country of ref document: EP

Kind code of ref document: A1