WO2012057371A1 - 엑스레이 그리드 및 그 제조방법 - Google Patents

엑스레이 그리드 및 그 제조방법 Download PDF

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Publication number
WO2012057371A1
WO2012057371A1 PCT/KR2010/007372 KR2010007372W WO2012057371A1 WO 2012057371 A1 WO2012057371 A1 WO 2012057371A1 KR 2010007372 W KR2010007372 W KR 2010007372W WO 2012057371 A1 WO2012057371 A1 WO 2012057371A1
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WO
WIPO (PCT)
Prior art keywords
rays
sheet
ray grid
ray
transmission
Prior art date
Application number
PCT/KR2010/007372
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English (en)
French (fr)
Korean (ko)
Inventor
전재영
박명규
Original Assignee
주식회사 아임
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
Application filed by 주식회사 아임 filed Critical 주식회사 아임
Priority to JP2012541003A priority Critical patent/JP2012530588A/ja
Priority to PCT/KR2010/007372 priority patent/WO2012057371A1/ko
Publication of WO2012057371A1 publication Critical patent/WO2012057371A1/ko

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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
    • A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4291—Arrangements for detecting radiation specially adapted for radiation diagnosis the detector being combined with a grid or grating

Definitions

  • the present invention relates to an X-ray grid and a method of manufacturing the same, and more particularly to an X-ray grid and a method of manufacturing the same that can obtain a clear image while reducing the amount of X-rays harmful to the human body.
  • X-ray imaging is an inspection method that detects a state or a lesion inside a human body by making an image with transmitted X-rays by irradiating X-rays on a human body to be examined. This is because X-rays penetrate the human body by using a phenomenon in which the amount of absorption is different for each tissue. As the X-rays pass through the human body, some of them are absorbed and scattered to blur the image.
  • the X-ray grid is used to prevent the image from being blurred by scattered X-rays and is disposed between the subject (human body) and the film.
  • the X-ray grid blocks scattered light and transmits only unscattered X-rays.
  • the amount of X-rays emitted from the X-ray generator may be increased.
  • increasing the radiation dose of X-rays increases the radiation exposure of the patient at the time of imaging, which is harmful to the human body.
  • breasts and tissues of women with weak tissues may be necrotic when the amount of X-rays increases.
  • the X-ray grid is formed of paper and synthetic resin instead of aluminum, the amount of X-ray radiation is reduced, but there is a limit to reducing the radiation dose so as not to harm the human body.
  • An object of the present invention is to provide an X-ray grid and a method of manufacturing the same, which are designed to solve the above-described problems and reduce the radiation dose to a degree that does not harm a human body and at the same time obtain a clear image quality.
  • the X-ray grid of the present invention comprises a sheet including a plurality of transmission holes penetrating X-rays and an absorbing portion surrounding the transmission holes to absorb X-rays.
  • the sheet is provided with a plurality of sheets are laminated while each sheet is interviewed vertically.
  • the absorber is made of any one of lead, gold, and tantalum.
  • Each sheet is formed in a honeycomb shape.
  • the transmission holes of each sheet stacked up and down to form a transmission path according to the incident path of the X-rays incident from the top are formed to communicate vertically.
  • Some of the transmission paths of the X-rays are formed vertically, and others are formed to be inclined downward in an oblique direction.
  • a sheet having a plurality of transmission holes and absorbing portions is produced by any one of a punching method by a laser, a chemical method by etching, or a molding method by a mold.
  • permeation holes of each sheet are formed at the same position as other sheets so that X-rays can be vertically transmitted when each sheet is stacked, and others are formed at different positions from other sheets so that X-rays can be transmitted in an oblique direction. do.
  • the content of lead is 85% by weight or more in the total components of the molding liquid.
  • the scattered radiation is absorbed in the absorbing portion of the sheet and the radiation having a straightness is transmitted through a plurality of through holes so that the transmittance of the radiation is high. Therefore, even if the X-ray generator emits X-rays that are not harmful to the human body, the amount of X-rays reaching the film through the subject and the X-ray grid increases, thereby obtaining a clear image.
  • FIG. 1 is a perspective view showing an x-ray grid according to a preferred embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line A-A of FIG.
  • Figure 3 is a schematic diagram showing the state of taking an X-ray using the x-ray grid of the present invention.
  • FIG. 4 is a view showing a state of manufacturing each sheet by a punching method by a laser.
  • FIG. 5 is a view showing a state of manufacturing each sheet by a chemical method by etching.
  • Figure 6 is a view showing a state of manufacturing each sheet by a molding method by a mold.
  • FIG. 1 is a perspective view showing an x-ray grid according to a preferred embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of FIG.
  • the X-ray grid 10 includes a plurality of sheets 11 including a plurality of transmission holes 11a that transmit X-rays and an absorbing portion 11b that surrounds the transmission holes 11a and absorbs X-rays. .
  • the transmission hole 11a of the sheet 11 transmits unscattered X-rays among the X-rays passing through the subject (human body), and the absorber 11b absorbs X-rays scattered among the X-rays passing through the subject and will be described later. Make a clear image on the film.
  • the sheet 11 is formed in a mesh shape, preferably in a honeycomb shape. When formed in a honeycomb shape, structural stability of the sheet 11 can be obtained.
  • the transmission holes 11a of each sheet 11 stacked up and down to form a transmission path in accordance with the incident path of the X-rays incident from the top are formed to communicate vertically.
  • Some of the transmission holes 11a of each sheet 11 are formed at the same position as the other sheets 11 so that the X-rays can be vertically transmitted when the sheets 11 are stacked, and the remaining X-rays are in a diagonal direction. It is formed at a different position from the other sheets 11 so as to be transmitted. That is, some of the transmission paths of the X-rays are formed vertically and the others are formed to be inclined downward in the diagonal direction.
  • Each sheet 11 may adjust stacking so that the transmission holes 11a may form a straight transmission path even if the incident angle ⁇ of the incident X-rays is changed.
  • any one of the lead (Pb), gold (Au), tantalum (Ta) is used as the material of the absorbing portion (11b).
  • lead which is excellent in X-ray absorption and economical in cost, is most used as a material of the absorber 11b.
  • FIG. 3 is a view schematically showing an image of X-rays using the X-ray grid of the present invention.
  • the X-ray generator 1, the subject (human body 20), the X-ray grid 10, and the X-ray film 30 are configured in this order.
  • X-rays radiated from the X-ray generator 1 during imaging may cause transmission, absorption, attenuation, and scattering as the object passes through the subject.
  • Diffuse reflection and scattering of X-rays generated at this time occurs differently depending on the atomic composition of bones, muscles, and organs that constitute the human body.
  • Such diffuse reflection and scattering of the X-rays is a factor to lower the contrast of the film is to remove the diffuse reflection and scattering X-rays from the X-ray grid.
  • Diffuse reflection and scattering X-rays of the X-rays incident on the X-ray grid are absorbed by the absorbing portion 11b of the sheet 11, and only the direct X-rays pass through the transmission hole 11a to reach the film to expose the film to the film. This bears.
  • FIG. 4 is a view showing a state of manufacturing each sheet by a punching method by a laser.
  • the system for punching the through hole of the sheet by the laser includes a laser generator 110 controlled by the terminal 100 and a reflection mirror reflecting a laser emitted from the laser generator 110. (120) 121, the scan mirror 130 for irradiating light reflected through the reflecting mirrors 120, 121 to the sheet 11 to form a transmission hole (11a) in the sheet 11, and the sheet ( 11) includes a seating portion 140 is seated.
  • the laser emitted from the laser generator 110 is reflected by the reflecting mirror (120, 121) to the scan mirror 130 and finally reflected by the scan mirror 130 is irradiated to the sheet 11,
  • the through hole 11a is formed in the sheet 11.
  • the position of the seat 11 seated on the seating part 140 is changed, or the positions of the reflecting mirrors 120 and 121 and the scan mirror 130 are changed to transmit a plurality of transmissions to the seat 11.
  • the hole 11a is formed.
  • FIG. 5 is a view showing a state of manufacturing each sheet by a chemical method by etching.
  • the process of forming the through hole of the sheet by etching may include forming a mask pattern 210 on the substrate 200 (S1) and a nickname protective layer 220 on the substrate 200. ) (S2) and the step (S3) to form a transmission hole (11a) by etching a portion other than the etching protection film 220, except for the mask pattern (210).
  • the substrate 200 preferably uses lead (Pb) having excellent absorption of X-rays.
  • Wet may be wet or dry etching. In the case of wet etching, etching is performed using the same type of etching solution as hydrogen peroxide acetic acid, and in the case of dry etching, dry etching is performed by using an Alby equipment.
  • the thickness of the substrate 200 to form the sheet 11 of the X-ray grid of the present invention is preferably formed in 0.2 ⁇ 0.6mm in consideration of the plurality of sheets 11 are stacked. If the thickness exceeds 0.6mm, the inner diameter of the transmission hole may expand from the top to the bottom in the process of forming the transmission hole. If the diameter is less than 0.2mm, the strength of the sheet 11 may be weak.
  • FIG. 6 is a view illustrating a state in which each sheet is manufactured by a molding method using a mold.
  • the mold 300 includes a lower mold 310 and an upper mold 320.
  • a molding liquid insertion groove 311 is formed in the upper surface of the lower mold 310 to form the sheet 11 by injecting the molding liquid, and a through hole of the sheet 11 is formed in the bottom surface of the molding liquid insertion groove 311.
  • a plurality of protrusions 312 for forming the protrusion is formed at a predetermined interval.
  • a molding liquid injection hole 321 for injecting the molding liquid into the molding liquid insertion groove 311 of the lower mold 310 is formed at the center of the upper mold 320.
  • Two positioning protrusions 313 protrude from the upper side of the upper surface of the lower mold 310 in a diagonal direction, and a lower mold 310 is positioned on the upper mold 320.
  • the protrusion insertion hole 322 into which the protrusion 313 is inserted is formed in a diagonal direction.
  • the molding liquid when the molding liquid is injected through the molding liquid injection hole 321 of the upper mold 320 in a state where the lower mold 310 and the upper mold 320 face each other, the molding liquid is lowered.
  • the sheet 11 is completed by being inserted into the molding liquid insertion groove 311 of the mold 310.
  • the molding liquid for forming the sheet 11 contains lead (Pb) and tin (Sn).
  • the content of lead (Pb) is preferably at least 85% by weight relative to the total components. If the content of lead is less than 85% by weight, the absorption of scattered X-rays is reduced.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
PCT/KR2010/007372 2010-10-26 2010-10-26 엑스레이 그리드 및 그 제조방법 WO2012057371A1 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012541003A JP2012530588A (ja) 2010-10-26 2010-10-26 Ｘ線グリッド、及び、その製造方法
PCT/KR2010/007372 WO2012057371A1 (ko) 2010-10-26 2010-10-26 엑스레이 그리드 및 그 제조방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2010/007372 WO2012057371A1 (ko) 2010-10-26 2010-10-26 엑스레이 그리드 및 그 제조방법

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Publication Number Publication Date
WO2012057371A1 true WO2012057371A1 (ko) 2012-05-03

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WO (1) WO2012057371A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015203571A (ja) 2014-04-10 2015-11-16 株式会社フジキン 散乱ｘ線除去用グリッドの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814235A (en) * 1995-05-09 1998-09-29 Thermo Trex Corporation Air cross grids for mammography and methods for their manufacture and use
KR20010017988A (ko) * 1999-08-16 2001-03-05 전춘택 엑스레이 그리드
KR200284751Y1 (ko) * 2002-04-23 2002-08-13 정원정밀공업 주식회사 엑스선 촬영 시스템에 사용되는 엑스레이 그리드
US7180982B2 (en) * 2002-01-26 2007-02-20 Koninklijke Philips Electronics N.V. Grid for the absorption of X-rays

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806958A (en) * 1954-01-21 1957-09-17 Gen Electric Radiographic diaphragm and method of making the same
JPS5152887A (en) * 1974-09-18 1976-05-10 Hitachi Electronics Kakuhoshasenzoyokorimeeta
JPS58177637A (ja) * 1982-04-14 1983-10-18 株式会社東芝 放射線用グリツドの製造方法
US4951305A (en) * 1989-05-30 1990-08-21 Eastman Kodak Company X-ray grid for medical radiography and method of making and using same
JPH06237927A (ja) * 1993-02-15 1994-08-30 Hitachi Medical Corp 放射線画像撮影装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814235A (en) * 1995-05-09 1998-09-29 Thermo Trex Corporation Air cross grids for mammography and methods for their manufacture and use
KR20010017988A (ko) * 1999-08-16 2001-03-05 전춘택 엑스레이 그리드
US7180982B2 (en) * 2002-01-26 2007-02-20 Koninklijke Philips Electronics N.V. Grid for the absorption of X-rays
KR200284751Y1 (ko) * 2002-04-23 2002-08-13 정원정밀공업 주식회사 엑스선 촬영 시스템에 사용되는 엑스레이 그리드

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JP2012530588A (ja) 2012-12-06

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