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WO2009091198A2 - Appareil d'acquisition d'images du type trame et procédé correspondant - Google Patents

Appareil d'acquisition d'images du type trame et procédé correspondant Download PDF

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Publication number
WO2009091198A2
WO2009091198A2 PCT/KR2009/000227 KR2009000227W WO2009091198A2 WO 2009091198 A2 WO2009091198 A2 WO 2009091198A2 KR 2009000227 W KR2009000227 W KR 2009000227W WO 2009091198 A2 WO2009091198 A2 WO 2009091198A2
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WO
WIPO (PCT)
Prior art keywords
image
subject
rays
light source
ray light
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2009/000227
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English (en)
Korean (ko)
Other versions
WO2009091198A3 (fr
Inventor
Chang Joon Ro
Hueo Sung Jo
Sung Il Choi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vatech Co Ltd
Original Assignee
Vatech Co Ltd
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.)
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Publication date
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Application filed by Vatech Co Ltd filed Critical Vatech Co Ltd
Publication of WO2009091198A2 publication Critical patent/WO2009091198A2/fr
Publication of WO2009091198A3 publication Critical patent/WO2009091198A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • 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
    • 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
    • A61B6/027—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
    • 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
    • A61B6/54—Control of apparatus or devices for radiation diagnosis
    • A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure

Definitions

  • the present invention relates to a frame-type image acquisition device and an image acquisition method, and more particularly, to selectively irradiate x-rays to a region of interest of a subject, and to synchronize the image sensor to operate only in a section to which x-rays are irradiated.
  • the present invention relates to a frame type image acquisition device and an image acquisition method for reducing the x-ray dose to be exposed.
  • the conventional medical image acquisition method includes a large area sensor that can cover the entire area of the subject largely, and obtains an image of the subject by irradiating x-rays to the entire area of the subject at once and using the line sensor. There is a method of scanning by continuously scanning.
  • a method of scanning by using the line sensor is also called a line scan method, and generally uses a time delay integration (TDI) line scan method.
  • TDI time delay integration
  • the line sensor used in the line scan method is a one-dimensional sensor in which pixels for receiving x-rays are arranged on a line, so that the line sensor or the subject is moved in order to take a two-dimensional area of the subject, and the images are continuously taken line by line. To get the image.
  • the line scan method has a merit that a high resolution image can be obtained because the number of pixels is small compared to the method using the area sensor because it is inexpensive, mobile, and continuous scanning.
  • the line scan method has a problem in that, in order to photograph the subject at a high speed, the time for accumulating the charges to each pixel is shortened and the amount of light is insufficient, so that the image is not obtained clearly.
  • the line scan method is economical and obtains a high resolution image compared to the method using the area sensor, but has a disadvantage in that the shooting speed is slow.
  • the present invention was devised to solve the above problems, and an object of the present invention is to increase the economical efficiency by using an area sensor, but to reduce the size, x is exposed to the subject by selectively irradiating the x-ray to the subject selectively in certain intervals
  • the present invention provides a frame type image acquisition device and an image acquisition method that can reduce dose.
  • An image acquisition apparatus for achieving the above object is an x-ray light source that moves along a constant trajectory around a subject and irradiates x-rays, and the x-ray light source with the subject therebetween.
  • An image sensor positioned toward the light source, moving in correspondence with the x-ray light source, and receiving an x-ray passing through the subject to obtain an image of an image layer that is a region of interest in the subject;
  • the image sensor can acquire the subject image of the frame unit, each of the x-rays passing through the image layer From the synchronization module and the image sensor for synchronizing the x-ray light source and the image sensor so as not to overlap each other
  • an image processing apparatus for processing the received image.
  • the x-ray light source rotates based on a predetermined center of rotation between the x-ray light source and the image layer to irradiate the x-rays.
  • the image acquisition method for achieving the above object is to face the x-ray light source for irradiating x-rays with one side of the subject between the x-ray light source and the x-ray passing through the object
  • a first step having an image sensor for receiving light moves along a certain trajectory, irradiates the x-rays from one side to the other side of the subject, and synchronizes the x-rays selectively in certain sections on the trajectory.
  • the second step is a step 2-1 of irradiating the x-ray to one side of the subject to obtain a first frame image which is an image by x-rays irradiated in the first section on the trajectory
  • a second frame image obtained by moving the x-ray light source and the image sensor to obtain a second frame image which is an image of a subject adjacent to one side of the subject and is an image of x-rays irradiated in a second section on the trajectory
  • a second frame image obtained by sequentially acquiring a frame image adjacent to a previously captured frame image and being an image of the other side of the subject, and obtaining an n-frame image which is an image by x-rays radiated in an n-th section on the trajectory.
  • the frame images of the second step are obtained as images having no image overlap with each other.
  • the x-ray light source of the second step is rotated at a predetermined center of rotation between the x-ray light source and the image layer which is the region of interest in the subject, and irradiates the x-rays.
  • an area sensor is used, but by photographing certain sections of the subject in units of frames, the amount of x-rays exposed to the subject can be reduced.
  • FIG. 1 is a view showing an image acquisition device according to an embodiment of the present invention.
  • FIG. 2 is a conceptual diagram showing that an image acquisition device operates according to an embodiment of the present invention
  • FIG. 3 is a view showing an image of a subject photographed by the image acquisition device according to an embodiment of the present invention.
  • FIG. 4 is a flowchart illustrating an image acquisition method according to an embodiment of the present invention.
  • x-ray light source 200 image sensor
  • synchronization module 400 image processing device
  • FIG. 1 is a view showing an image acquisition device according to an embodiment of the present invention.
  • an image acquisition device includes an x-ray light source 100, an image sensor 200, a synchronization module 300, an image processing device 400, and a display device 500. It is done by
  • the x-ray light source 100 is provided with an x-ray tube (not shown) for generating x-rays therein, and irradiates x-rays to the subject 10 using slits (not shown).
  • the x-ray light source 100 irradiates x-rays while moving around the subject 10 along a predetermined trajectory.
  • the image sensor 200 is an area sensor having a constant area, provided to face the x-ray light source 100 with the subject 10 interposed therebetween, and a trajectory corresponding to the trajectory of the x-ray light source 100 moving. Move along.
  • the image sensor 200 receives the x-rays emitted from the x-ray light source 100 and transmitted through the subject 10 to obtain an image of the subject 10.
  • the image sensor 200 acquires an image of the image layer 11, which is a region of interest in the subject 10.
  • the image sensor 200 is provided as a CD (ccd) sensor or a CMOS (cmos) sensor.
  • any sensor can be used as long as it can receive x-rays.
  • the image sensor 200 is a small area sensor smaller than the large area sensor that is provided with a size to cover only a portion of the subject 10 covers the entire area of the conventional subject (10).
  • the synchronization module 300 controls the operation of the x-ray light source 100 and the image sensor 200.
  • the synchronization module 300 allows the x-ray light source 100 to selectively irradiate x-rays only in certain sections on the trajectory, and at the same time, the image sensor 200 only in certain sections in which the x-rays are irradiated. Synchronize the light receiving operation of the camera.
  • the image processing apparatus 400 receives an image signal of the subject 10 from the image sensor 200, forms a digital image, and displays the image to a user through the display apparatus 500.
  • FIG. 2 is a conceptual diagram illustrating an operation of an image acquisition device according to an embodiment of the present invention
  • FIG. 3 is a view illustrating an image of a subject photographed by the image acquisition device according to an embodiment of the present invention.
  • the x-ray light source 100 irradiates X-rays to one side portion 11a of the subject 10 once in the first section 100a which is a starting point on a certain trajectory 100a, 100b.
  • the image sensor 200 receives an x-ray passing through one side portion 11a of the subject 10 to obtain a first frame image 210a which is a single image.
  • the image sensor 200 captures an image layer 11 which is a region of interest of the subject 10.
  • the image layer 100 may be referred to as a focal point of the image acquisition device according to an embodiment of the present invention.
  • the image layer 11 may be a jaw bone 11a, 11b ... 11n including a tooth of a head of a person.
  • the x-ray light source 100 is rotated by a predetermined angle around the virtual rotation center (c) positioned between the x-ray light source 100 and the image layer 11 to move to the second section (100b).
  • the x-ray is irradiated once to the portion 11b adjacent to the one side portion 11a of the subject.
  • the image sensor 200 moves in a direction 200a-> 200b corresponding to a direction (100a-> 100b) in which the x-ray light source 100 moves to be adjacent to one side 11a of the subject.
  • a second frame image 210b which is an image of 11b is obtained.
  • the x-ray light source 100 moves to the next section, acquires the frame images 210c, 210d, and 210e, moves to the nth section 100n, and ends up to the nth frame image 210n.
  • the synchronization module 300 matches the synchronization signal 300a to which the x-ray light source 100 irradiates x-rays with the synchronization signal 300b to allow the image sensor 200 to receive a light. will be.
  • the image of the subject 10 is photographed while the x-ray light source 100 and the image sensor 200 are moved, but the x-ray light source 100 and the image sensor are reversed.
  • the 200 is fixed and a method of rotating the subject 10 is also possible.
  • the use of the image acquisition device according to the present invention has the effect of greatly reducing the x-ray exposure amount.
  • the x-rays irradiated from the irradiation sections 100a, 100b ... 100n pass through the image layer so that the respective frame images 210a, 210b ... 210n do not overlap each other.
  • the X-ray irradiation of the x-ray light source 100 is synchronized so as not to overlap each other.
  • the amount of x-rays exposed from the x-ray light source 100 to the subject 11 can be reduced as much as possible.
  • FIG. 4 is a flowchart illustrating an image acquisition method according to an embodiment of the present invention.
  • an image acquisition method may be performed by comparing an x-ray light source 100 and an x-ray light source with one side portion 11a of the subject 10 interposed therebetween.
  • the image sensor 200 is positioned to receive the x-rays passing through the subject (S1000).
  • a first frame which is an image of x-rays radiated from the first section 100a of the trajectory images 100a, 100b ... 100n by irradiating x-rays to one side 11a of the subject 11.
  • An image 210a is obtained (S2000).
  • the x-ray light source 100 moves to the second section 200b, and the image sensor 200 moves to the position 200b corresponding to the second section 200b to make the second frame image 210b.
  • the x-ray light source 100 is rotated based on the virtual rotation center (c) between the x-ray light source 100 and the image layer (11).
  • the x-ray light source 100 may move in a straight line to irradiate x-rays.
  • the previously captured frame image 210b and the adjacent frame images 210c, 210d, and 210e are sequentially obtained, which is an image of the other side of the subject 10, and is irradiated in the nth section on the trajectory.
  • an nth frame image 210n which is a line image, is acquired (S4000).
  • the frame images 210a, 210b, ... 210n do not overlap each other.
  • the X-rays are irradiated so that the X-rays radiated from the irradiation sections on the trajectories 100a, 100b ... 100n through which the x-ray light source 100 moves do not overlap each other when passing through the image layer 11.
  • the location must be synchronized.
  • the subject image is processed by processing the frame images of the subject acquired by the image sensor 200 (S5000).
  • the present invention by selectively irradiating x-rays to a region of interest of the subject, and by synchronizing the image sensor to operate only in a section irradiated with x-rays, by reducing the amount of x-rays exposed to the subject, it can be utilized for obtaining various medical images have.

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

Abstract

La présente invention concerne un appareil utilisé pour l'acquisition d'images du type trame et un procédé correspondant, lequel inclut notamment l'irradiation par rayons X d'une région intéressante sélective d'un objet et la synchronisation d'un capteur d'image afin qu'il n'agisse que dans la section irradiée par les rayons X, ce qui réduit ainsi les doses de rayons X auxquelles est exposé l'objet.
PCT/KR2009/000227 2008-01-15 2009-01-15 Appareil d'acquisition d'images du type trame et procédé correspondant Ceased WO2009091198A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080004370A KR100923101B1 (ko) 2008-01-15 2008-01-15 프레임방식의 영상획득장치 및 영상획득방법
KR10-2008-0004370 2008-01-15

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Publication Number Publication Date
WO2009091198A2 true WO2009091198A2 (fr) 2009-07-23
WO2009091198A3 WO2009091198A3 (fr) 2009-09-17

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KR (1) KR100923101B1 (fr)
WO (1) WO2009091198A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101599028B1 (ko) * 2009-07-23 2016-03-03 삼성전자주식회사 산란 감소를 위한 ｘ-선 촬영 장치 및 방법
KR101373006B1 (ko) 2011-12-27 2014-03-13 삼성전자주식회사 엑스레이 조사 범위를 조절하는 방법 및 장치
EP2813183B1 (fr) * 2013-06-11 2018-03-07 Samsung Electronics Co., Ltd Procédé et appareil d'obtention d'image par rayons X de région d'intérêt de l'objet cible
KR101666943B1 (ko) * 2013-06-11 2016-10-28 삼성전자주식회사 대상체의 관심 영역(roi)에 대한 x선 이미지를 획득하는 방법 및 장치

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7136452B2 (en) * 1995-05-31 2006-11-14 Goldpower Limited Radiation imaging system, device and method for scan imaging
KR100353591B1 (ko) 1999-03-18 2002-09-26 스타브이-레이주식회사 다수의 촬상소자를 이용한 고해상도 디지털 방사선 촬영장치
AU2002237451A1 (en) 2000-12-22 2002-07-08 Simage Oy A radiation imaging system and scanning device
CA2530390A1 (fr) * 2003-07-08 2005-01-13 Xcounter Ab Detection par balayage d'un rayonnement ionisant pour tomosynthese
US7336763B2 (en) * 2005-05-02 2008-02-26 Oy Ajat Ltd Dental extra-oral x-ray imaging system and method

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WO2009091198A3 (fr) 2009-09-17
KR20090078506A (ko) 2009-07-20
KR100923101B1 (ko) 2009-10-22

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