KR860009603A - X선단층 촬영장치(x線斷層撮影裝置) - Google Patents

X선단층 촬영장치(x線斷層撮影裝置) Download PDF

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KR860009603A
KR860009603A KR1019850005937A KR850005937A KR860009603A KR 860009603 A KR860009603 A KR 860009603A KR 1019850005937 A KR1019850005937 A KR 1019850005937A KR 850005937 A KR850005937 A KR 850005937A KR 860009603 A KR860009603 A KR 860009603A
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ray
projection data
scanner
parallel beam
uniform parallel
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KR1019850005937A
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KR880000085B1 (ko
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이사오 호리바
히로유끼 다께우찌
히로시 니시무라
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기무라 히로가즈
가부시기 가이샤 히다찌 메디코
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • 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
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • 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
    • A61B6/03—Computed tomography [CT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
    • G01T1/2914—Measurement of spatial distribution of radiation
    • G01T1/2985—In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S378/00—X-ray or gamma ray systems or devices
    • Y10S378/901—Computer tomography program or processor

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Public Health (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Physics & Mathematics (AREA)
  • Pulmonology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Image Processing (AREA)

Abstract

내용 없음

Description

X선단층 촬영장치(X 線斷層撮影裝置)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 5 도는 상(像)재구성 연산 수단의 상세를 나타낸 블록도.
* 도면의 주요부분에 대한 부호의 설명
(10) : 스캐너, (11) : 상재구성(像再構成) 연산수단, (12) : 표시수단, (13) : 피검사체영역, (14) : 팬비임X선, (15) : X선관(X선원), (16) : 다소자(多素子) X선 검출기, (19) : 피검사체, (46), (50) : 불균일성을 보정하는 수단, (49) : 불균일 평행비임 투영데이터를 발생시키는 수단, (51) : 필터처리를 하는 수단.

Claims (3)

  1. 피검사체 영역을 덮는 팬비임 X선을 방사하는 X선원을 피검사체의 주위에 회전운동을 하고, 이 회전 운동중에 X선을 방사하고, 상기 피검사체를 투과한 팬형상으로 넓혀진 X선을 다소자(多素子) X선 검출기로 계측하므로서 복수개의 투영 데이터의 수집을 하는 스캐너와 이 투영 데이터에서 계측단면에 있어서의 피검사체의 X선의 흡수계수에 관한 분포화상(畵像)을 계산에 의해서 재구성하는 상재구성(像再構成) 연산 수단과 상기 분포화상을 표시하는 표시 수단을 가진 X선 단층촬영 장치에 있어서, 상기 상재구성 연산수단은, 상기 계측된 투영 데이터에서 불균일 평행 비임 투영 데이터를 발생시키는 수단과 이 불균일 평행비임 투영 데이터에 필터 처리를 하는 수단과 이 필터 보정된 투영 데이터를 사용해서 상기 불균일 평행 비임 투영 데이터의 불균일성을 보정함과 동시에 분포화상을 역투영하는 수단을 형성한 것을 특징으로 하는 X선 단층 촬영 장치.
  2. 상기 불균일 평행 비임 투영 데이터를 발생시키는 수단은 다소자 X선검출기로 계측된 투영데이터의 X선 비임각도를 제 1 의 좌표축으로 하고, 팬비임 내의 스캐너 회전중심에서 X선 비임까지의 거리를 회전중심에서 X선원(源)까지의 거리로 나뉴 값의 역정현(逆正弦)에 비례하는 불균일한 좌표축을 제 2 의 좌표축으로 하는 2차원 좌표를 설정하고, 이 2차원 좌표상에서 늘어놓은 것을 변경하는 연산을 하는 것을 특징으로 하는 X선 단층 촬영 장치.
  3. 상기 스캐너는 다소자 X선 검출기의 일정간격으로 늘어선 검출소자의 각도 간격의 정수배의 회전각도 위치마다 X선원에서 X선을 방사하는 것을 특징으로 하는 청구범위 1 또는 2 기재의 X선 단층촬영 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019850005937A 1985-05-22 1985-08-17 X선 단층 촬영장치(x線斷層撮影裝置) KR880000085B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP85-109764 1985-05-22
JP10976485 1985-05-22
JP109764 1985-05-22

Publications (2)

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KR860009603A true KR860009603A (ko) 1986-12-23
KR880000085B1 KR880000085B1 (ko) 1988-02-23

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KR1019850005937A KR880000085B1 (ko) 1985-05-22 1985-08-17 X선 단층 촬영장치(x線斷層撮影裝置)

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US (1) US4769757A (ko)
KR (1) KR880000085B1 (ko)
DE (1) DE3616881A1 (ko)
NL (1) NL193556C (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100383551B1 (ko) * 2001-04-06 2003-05-12 경 연 김 확장 칼만필터를 이용한 전기 임피던스 단층촬영법에서의동적 영상복원시스템과 방법 및 그 방법에 관한 컴퓨터프로그램 소스를 저장한 기록매체

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873632A (en) * 1984-04-27 1989-10-10 The Curators Of The University Of Missouri Apparatus and methods for scatter reduction in radiation imaging
US5128864A (en) * 1989-08-09 1992-07-07 W. L. Systems, Inc. Method for computing tomographic scans
US5229934A (en) * 1990-06-18 1993-07-20 Picker International, Inc. Post-processing technique for cleaning up streaks and artifacts in diagnostic images
DE4124775A1 (de) * 1990-08-03 1992-02-13 Thomas Chung Uhr
JP4412704B2 (ja) * 2003-06-09 2010-02-10 キヤノン株式会社 画像処理方法および装置並びにｘ線撮影装置
US7430270B2 (en) * 2004-06-09 2008-09-30 Koninklijke Philips Electronics N.V. Computerized tomography method with helical relative movement and conical beam
CN102428500B (zh) 2009-05-18 2014-10-29 皇家飞利浦电子股份有限公司 免内插扇形到平行射束重分装

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US30947A (en) * 1860-12-18 mahan
US4149247A (en) * 1975-12-23 1979-04-10 Varian Associates, Inc. Tomographic apparatus and method for reconstructing planar slices from non-absorbed and non-scattered radiation
NL7607976A (nl) * 1976-07-19 1978-01-23 Optische Ind De Oude Delft Nv Inrichting voor tomografie met voorzieningen waardoor signaalprofielen afgeleid van een di- vergerende stralingsbundel kunnen worden gere- construeerd in signaalprofielen die elk corre- sponderen met een bundel van evenwijdig inval- lende stralen.
NL7908545A (nl) * 1979-11-23 1981-06-16 Philips Nv Inrichting voor het bepalen van een stralingsabsorptie- verdeling in een vlak van een lichaam.
US4570224A (en) * 1982-11-29 1986-02-11 Elscint, Inc. Combining rebinned and unrebinned parallel ray data with unequal lateral spacing to create tomograph images
US4682291A (en) * 1984-10-26 1987-07-21 Elscint Ltd. Noise artifacts reduction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100383551B1 (ko) * 2001-04-06 2003-05-12 경 연 김 확장 칼만필터를 이용한 전기 임피던스 단층촬영법에서의동적 영상복원시스템과 방법 및 그 방법에 관한 컴퓨터프로그램 소스를 저장한 기록매체

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NL193556C (nl) 2000-02-02
NL193556B (nl) 1999-10-01
DE3616881A1 (de) 1986-11-27
KR880000085B1 (ko) 1988-02-23
US4769757A (en) 1988-09-06
NL8601284A (nl) 1986-12-16

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