FR2452718A1 - Dispositif pour definir des differences d'absorption locale dans un objet a l'aide d'une source de rontgen generant un faisceau d'irradiation divergent - Google Patents

Dispositif pour definir des differences d'absorption locale dans un objet a l'aide d'une source de rontgen generant un faisceau d'irradiation divergent

Info

Publication number
FR2452718A1
FR2452718A1 FR8006751A FR8006751A FR2452718A1 FR 2452718 A1 FR2452718 A1 FR 2452718A1 FR 8006751 A FR8006751 A FR 8006751A FR 8006751 A FR8006751 A FR 8006751A FR 2452718 A1 FR2452718 A1 FR 2452718A1
Authority
FR
France
Prior art keywords
detector
rontgen
radiation beam
diaphragm
radiation
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.)
Granted
Application number
FR8006751A
Other languages
English (en)
Other versions
FR2452718B1 (fr
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2452718A1 publication Critical patent/FR2452718A1/fr
Application granted granted Critical
Publication of FR2452718B1 publication Critical patent/FR2452718B1/fr
Granted legal-status Critical Current

Links

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
    • A61B6/03—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
    • A61B6/06—Diaphragms
    • 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
    • A61B6/08—Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
    • 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
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4021—Arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot

Landscapes

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

Abstract

A L'OCCASION D'EXAMENS EFFECTUES PAR VOIE TOMOGRAPHIQUE, DES DEFAUTS ANNULAIRES ARTIFICIELS SURVIENNENT DU FAIT QUE LA TEMPERATURE DE LA SOURCE DE RONTGEN AUGMENTE ET QUE LA POSITION DU FOYER DU RAYONNEMENT CHANGE. COMME LA DISTANCE ENTRE LE DETECTEUR ET LE DIAPHRAGME QUI LAISSE PASSER LE FAISCEAU DE RAYONNEMENT EST PLUSIEURS FOIS SUPERIEURE A LA DISTANCE ENTRE LE FOYER DE RAYONNEMENT ET LE DIAPHRAGME, LA POSITION DU FAISCEAU SUR LE DETECTEUR CHANGE ENCORE PLUS. SI LE DETECTEUR EST FORME PAR DES ELEMENTS DE DETECTION QUI NE SONT PAS PARFAITEMENT IDENTIQUES, LES SENSIBILITES DES ELEMENTS PEUVENT CHANGER AUSSI, CE QUI LORS DE LA RECONSTRUCTION CONDUIT AUXDITS DEFAUTS. SELON L'INVENTION, ON MESURE LA POSITION OU LE FAISCEAU DE RAYONNEMENT FRAPPE LE DETECTEUR, ET, SUR LA BASE DE CETTE MESURE, LE DIAPHRAGME EST REGLE DE FACON QUE LE FAISCEAU FRAPPE TOUJOURS LA MEME REGION DU DETECTEUR. APPLICATION: TOMOGRAPHES A RECONSTRUCTION D'IMAGE PAR ORDINATEUR.
FR8006751A 1979-03-27 1980-03-26 Dispositif pour definir des differences d'absorption locale dans un objet a l'aide d'une source de rontgen generant un faisceau d'irradiation divergent Granted FR2452718A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792912010 DE2912010A1 (de) 1979-03-27 1979-03-27 Geraet zur messung der absorptionsverteilung

Publications (2)

Publication Number Publication Date
FR2452718A1 true FR2452718A1 (fr) 1980-10-24
FR2452718B1 FR2452718B1 (fr) 1983-11-18

Family

ID=6066564

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8006751A Granted FR2452718A1 (fr) 1979-03-27 1980-03-26 Dispositif pour definir des differences d'absorption locale dans un objet a l'aide d'une source de rontgen generant un faisceau d'irradiation divergent

Country Status (8)

Country Link
US (1) US4361764A (fr)
JP (1) JPS55129044A (fr)
CA (1) CA1143482A (fr)
DE (1) DE2912010A1 (fr)
ES (1) ES489877A1 (fr)
FR (1) FR2452718A1 (fr)
GB (1) GB2049237B (fr)
NL (1) NL8001707A (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4559639A (en) * 1982-11-22 1985-12-17 General Electric Company X-Ray detector with compensation for height-dependent sensitivity and method of using same
GB2181330B (en) * 1985-09-26 1990-05-09 Toshiba Kk X-ray inspection apparatus
US4991189A (en) * 1990-04-16 1991-02-05 General Electric Company Collimation apparatus for x-ray beam correction
US5131021A (en) * 1991-06-21 1992-07-14 General Electric Company Computed tomography system with control and correction of fan beam position
EP0673623A1 (fr) * 1994-03-24 1995-09-27 Regam Medical Systems Ab Balayage par couche formant une radiographie
US6118840A (en) * 1998-01-20 2000-09-12 General Electric Company Methods and apparatus to desensitize incident angle errors on a multi-slice computed tomograph detector
JP3942142B2 (ja) * 2000-12-15 2007-07-11 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 放射線断層撮影装置およびその方法
JP2004536643A (ja) 2001-07-25 2004-12-09 デンツプライ インターナショナル インコーポレーテッド 実時間デジタルｘ線撮像装置
JP3947372B2 (ja) * 2001-07-25 2007-07-18 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー Ｘ線ｃｔシステムにおけるアパーチャの位置調整機構およびガントリ装置ならびにその制御方法
AU2003261200A1 (en) 2002-07-25 2004-02-25 Dentsply International Inc. Real-time digital x-ray imaging apparatus and method
JP2007151806A (ja) * 2005-12-05 2007-06-21 Ge Medical Systems Global Technology Co Llc Ｘ線ｃｔ撮像方法およびｘ線ｃｔ装置
WO2008075267A2 (fr) * 2006-12-19 2008-06-26 Koninklijke Philips Electronics N.V. Dispositif et procédé pour former une image d'un objet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2732073A1 (de) * 1976-07-15 1978-01-19 Tokyo Shibaura Electric Co Tomographievorrichtung
DE2818610A1 (de) * 1977-09-02 1979-03-08 Hitachi Medical Corp Tomographie-geraet
FR2406208A1 (fr) * 1977-10-14 1979-05-11 Philips Nv Dispositif d'examen pour definir le degre d'absorption locale dans un plan passant par un corps
FR2408197A1 (fr) * 1977-11-03 1979-06-01 American Science & Eng Inc Appareil de balayage pour tacographie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048505A (en) * 1974-07-17 1977-09-13 E M I Limited Radiography
US4031396A (en) * 1975-02-28 1977-06-21 General Electric Company X-ray detector
DE2609626A1 (de) * 1976-03-09 1977-09-15 Philips Patentverwaltung Strahlennachweisvorrichtung
US4143273A (en) * 1977-04-11 1979-03-06 Ohio-Nuclear, Inc. Variable collimator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2732073A1 (de) * 1976-07-15 1978-01-19 Tokyo Shibaura Electric Co Tomographievorrichtung
DE2818610A1 (de) * 1977-09-02 1979-03-08 Hitachi Medical Corp Tomographie-geraet
FR2406208A1 (fr) * 1977-10-14 1979-05-11 Philips Nv Dispositif d'examen pour definir le degre d'absorption locale dans un plan passant par un corps
FR2408197A1 (fr) * 1977-11-03 1979-06-01 American Science & Eng Inc Appareil de balayage pour tacographie

Also Published As

Publication number Publication date
DE2912010C2 (fr) 1987-04-16
NL8001707A (nl) 1980-09-30
DE2912010A1 (de) 1980-10-09
US4361764A (en) 1982-11-30
FR2452718B1 (fr) 1983-11-18
CA1143482A (fr) 1983-03-22
JPS55129044A (en) 1980-10-06
GB2049237B (en) 1983-02-16
JPS6316129B2 (fr) 1988-04-07
GB2049237A (en) 1980-12-17
ES489877A1 (es) 1980-09-16

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