ES473263A1 - Un dispositivo perfeccionado para tomografia por computadora - Google Patents

Un dispositivo perfeccionado para tomografia por computadora

Info

Publication number
ES473263A1
ES473263A1 ES473263A ES473263A ES473263A1 ES 473263 A1 ES473263 A1 ES 473263A1 ES 473263 A ES473263 A ES 473263A ES 473263 A ES473263 A ES 473263A ES 473263 A1 ES473263 A1 ES 473263A1
Authority
ES
Spain
Prior art keywords
detectors
thicknesses
image
output signals
detector output
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.)
Expired
Application number
ES473263A
Other languages
English (en)
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 ES473263A1 publication Critical patent/ES473263A1/es
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/58—Testing, adjusting or calibrating apparatus or devices for radiation diagnosis
    • A61B6/582—Calibration
    • A61B6/583—Calibration using calibration phantoms
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
    • 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

Landscapes

  • 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)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Medical Treatment And Welfare Office Work (AREA)

Abstract

Un dispositivo perfeccionado para tomografía por computadora, que comprende una fuente de rayos X para irradiar un paciente a examinar en direcciones diferentes, un número de detectores de rayos X, y un circuito de tratamiento de señal que incluye una memoria, para tratar la señal de salida de detector con el fin de formar señales de entrada a computador, caracterizado porque el circuito de tratamiento de señal comprende un comparador para comparar señales de salida de detector medidas con señales de salida de detector almacenadas en la memoria y obtenidas durante la irradiación de un número de espesores de capa de un material de calibración que tiene al menos sustancialmente las mismas propiedades de absorción de rayos X que el tejido humano, con el fin de determinar, por medio de interpolación, un valor de calibración que es función del espesor de capa del material de calibración correspondiente a una señal de salida de detector medida, y con el fin de generar una señal de entrada a computador que es función del valor de calibración determinado.
ES473263A 1977-09-14 1978-09-12 Un dispositivo perfeccionado para tomografia por computadora Expired ES473263A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7710052A NL7710052A (nl) 1977-09-14 1977-09-14 Inrichting voor computer-tomografie.

Publications (1)

Publication Number Publication Date
ES473263A1 true ES473263A1 (es) 1979-04-01

Family

ID=19829177

Family Applications (1)

Application Number Title Priority Date Filing Date
ES473263A Expired ES473263A1 (es) 1977-09-14 1978-09-12 Un dispositivo perfeccionado para tomografia por computadora

Country Status (14)

Country Link
US (1) US4225789A (es)
JP (1) JPS5453882A (es)
AU (1) AU516242B2 (es)
BE (1) BE870408A (es)
BR (1) BR7805923A (es)
CA (1) CA1116317A (es)
DE (1) DE2838808A1 (es)
ES (1) ES473263A1 (es)
FR (1) FR2403601B1 (es)
GB (1) GB2004437B (es)
IL (1) IL55545A (es)
IT (1) IT1098564B (es)
NL (1) NL7710052A (es)
SE (1) SE438439B (es)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594241A (en) * 1979-01-11 1980-07-17 Hitachi Medical Corp Xxray transverse layer device
JPS5599087A (en) * 1979-01-23 1980-07-28 Shimadzu Corp Emission type tomography
JPS614856Y2 (es) * 1979-01-23 1986-02-14
US4626688A (en) 1982-11-26 1986-12-02 Barnes Gary T Split energy level radiation detection
US4672650A (en) * 1984-02-16 1987-06-09 Kabushiki Kaisha Toshiba Tomographic testing apparatus
US4980904A (en) * 1985-11-15 1990-12-25 Picker International, Inc. Radiation imaging calibration
FR2629214A1 (fr) * 1988-03-25 1989-09-29 Thomson Cgr Procede et systeme d'etalonnage d'un scanner a rayons x en utilisant un seul etalon non circulaire
FR2632749B1 (fr) * 1988-06-10 1990-08-24 Gen Electric Cgr Procede et systeme d'etalonnage d'un scanner a rayons x en utilisant un ou plusieurs etalons circulaires excentres
FR2648229B1 (fr) * 1989-06-09 1991-09-06 Gen Electric Cgr Procede d'etalonnage d'un systeme radiologique et de mesure de l'epaisseur equivalente d'un objet
FR2664397B1 (fr) * 1990-07-06 1992-09-11 Gen Electric Cgr Procede d'estimation et d'etalonnage de la lumination recue par un film radiographique.
FR2664398B1 (fr) * 1990-07-06 1992-10-16 Gen Electric Cgr Procede de determination automatique de la duree d'exposition d'un film radiographique a partir d'une cassette de radiologie avec cellule detectrice incorporee et systeme de mise en óoeuvre.
FR2664395B1 (fr) * 1990-07-06 1992-09-11 Gen Electric Cgr Procede de determination automatique de la duree d'exposition d'un film radiographique et systeme de mise en óoeuvre.
DE69106953T2 (de) * 1990-07-06 1995-06-22 Gen Electric Cgr Verfahren zur automatischen Bestimmung der Belichtungszeit für einen Röntgenfilm und dieses verwendendes System.
FR2664396B1 (fr) * 1990-07-06 1992-09-11 Gen Electric Cgr Procede de determination de la fonction representant l'effet de non reciprocite d'un film radiographique.
FR2705785B1 (fr) * 1993-05-28 1995-08-25 Schlumberger Ind Sa Procédé pour déterminer la fonction d'atténuation d'un objet par rapport à la transmission d'une épaisseur de référence d'un matériau de référence et dispositif pour la mise en Óoeuvre du procédé.
US6148057A (en) * 1998-11-02 2000-11-14 Analogic Corporation Apparatus and method for calibrating detectors in a computed tomography scanner
US6315447B1 (en) * 1998-12-22 2001-11-13 Bio-Imaging Technologies, Inc. Variable composition phantom simulating varying degrees of body fat for dual energy x-ray machine calibration
US6778681B2 (en) * 2001-05-09 2004-08-17 Invision Technologies, Inc. Analysis and presentation of internal features of logs
DE102004034237A1 (de) * 2004-07-15 2006-02-09 Siemens Ag Verfahren zur Korrektur von Detektorsignalen eines Gerätes zur Rekonstruktion von Schnittbildern aus Projektionsdaten
DE102004039681B4 (de) * 2004-08-16 2006-06-01 Siemens Ag Tomographiegerät und Verfahren für ein Tomographiegerät
US8116432B2 (en) 2007-04-20 2012-02-14 General Electric Company X-ray tube target brazed emission layer
US8428222B2 (en) * 2007-04-20 2013-04-23 General Electric Company X-ray tube target and method of repairing a damaged x-ray tube target
DE102010042388A1 (de) * 2010-10-13 2012-04-19 Siemens Aktiengesellschaft Verfahren zur Kalibrierung eines CT-Systems mit zumindest einer Fokus-Detektor-Kombination mit einem quantenzählenden Detektor
EP3006084B1 (en) * 2013-06-06 2018-11-14 Mitsubishi Electric Corporation Particle therapy device and method for setting dose calibration factor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1283915A (en) * 1968-08-23 1972-08-02 Emi Ltd A method of and apparatus for examination of a body by radiation such as x or gamma radiation
US4035647A (en) * 1972-05-17 1977-07-12 E M I Limited Radiography
GB1508300A (en) * 1974-05-08 1978-04-19 Emi Ltd Radiology
US3965358A (en) * 1974-12-06 1976-06-22 Albert Macovski Cross-sectional imaging system using a polychromatic x-ray source
DE2609226A1 (de) * 1976-03-05 1977-09-08 Siemens Ag Anordnung zur untersuchung eines koerpers mit ionisierender strahlung
US4029963A (en) * 1976-07-30 1977-06-14 The Board Of Trustees Of Leland Stanford Junior University X-ray spectral decomposition imaging system
US4149081A (en) * 1976-11-29 1979-04-10 Varian Associates, Inc. Removal of spectral artifacts and utilization of spectral effects in computerized tomography

Also Published As

Publication number Publication date
IT7827526A0 (it) 1978-09-11
FR2403601B1 (fr) 1985-10-31
IL55545A0 (en) 1978-12-17
IL55545A (en) 1981-07-31
FR2403601A1 (fr) 1979-04-13
US4225789A (en) 1980-09-30
DE2838808A1 (de) 1979-03-15
GB2004437B (en) 1982-03-24
NL7710052A (nl) 1979-03-16
AU3967578A (en) 1980-03-13
BE870408A (fr) 1979-03-12
JPS6258737B2 (es) 1987-12-08
GB2004437A (en) 1979-03-28
JPS5453882A (en) 1979-04-27
AU516242B2 (en) 1981-05-21
CA1116317A (en) 1982-01-12
SE7809509L (sv) 1979-03-15
SE438439B (sv) 1985-04-22
IT1098564B (it) 1985-09-07
BR7805923A (pt) 1979-05-02

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