FR2387024A1 - Systeme de tomographie calculee - Google Patents

Systeme de tomographie calculee

Info

Publication number
FR2387024A1
FR2387024A1 FR7810544A FR7810544A FR2387024A1 FR 2387024 A1 FR2387024 A1 FR 2387024A1 FR 7810544 A FR7810544 A FR 7810544A FR 7810544 A FR7810544 A FR 7810544A FR 2387024 A1 FR2387024 A1 FR 2387024A1
Authority
FR
France
Prior art keywords
numbers
volume elements
values
window
wide range
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
FR7810544A
Other languages
English (en)
Other versions
FR2387024B1 (fr
Inventor
Thomas Wayne Lambert
James Edward Blake
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of FR2387024A1 publication Critical patent/FR2387024A1/fr
Application granted granted Critical
Publication of FR2387024B1 publication Critical patent/FR2387024B1/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]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G06T11/003—Reconstruction from projections, e.g. tomography
    • G06T11/008—Specific post-processing after tomographic reconstruction, e.g. voxelisation, metal artifact correction
    • 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

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

Abstract

Système de tomographie calculée pour l'identification de nombres CT correspondant à l'atténuation des rayons X par des éléments de volume d'un corps. Le système comprend des moyens d'affichage 40 des zones constituant l'image reconstruite par calculateur des différents éléments de volume explorés, une matrice de mémoire 18 permettant de mémoriser une large gamme de valeurs de signaux correspondant aux nombres des éléments de volume, des moyens de sélection 30, 31 sélectionnant une fenêtre constituée par un petit intervalle de valeurs délimité par deux valeurs limites contenues dans la large gamme, un niveau de base de la fenêtre étant centré entre ces deux limites, et des moyens 19 ne faisant moduler certaines zones de l'image reconstruite que par des signaux d'une bande étroite correspondant aux valeurs de nombres CT du niveau de base à l'intérieur de la fenêtre sélectionnée. Application à la localisation de tumeurs bénignes et malignes dans des tissus mous.
FR7810544A 1977-04-11 1978-04-10 Systeme de tomographie calculee Granted FR2387024A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/786,528 US4105922A (en) 1977-04-11 1977-04-11 CT number identifier in a computed tomography system

Publications (2)

Publication Number Publication Date
FR2387024A1 true FR2387024A1 (fr) 1978-11-10
FR2387024B1 FR2387024B1 (fr) 1985-04-26

Family

ID=25138844

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7810544A Granted FR2387024A1 (fr) 1977-04-11 1978-04-10 Systeme de tomographie calculee

Country Status (5)

Country Link
US (1) US4105922A (fr)
JP (1) JPS53140988A (fr)
DE (1) DE2815218A1 (fr)
FR (1) FR2387024A1 (fr)
GB (1) GB1599484A (fr)

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US4217498A (en) * 1976-09-13 1980-08-12 General Electric Company Tomographic scanning apparatus with ionization detector means
DE2705640A1 (de) * 1977-02-10 1978-08-17 Siemens Ag Rechnersystem fuer den bildaufbau eines koerperschnittbildes und verfahren zum betrieb des rechnersystems
EP0010885B1 (fr) * 1978-10-24 1983-02-23 EMI Limited Appareil de tomographie à calculateur
JPS59105439A (ja) * 1982-12-10 1984-06-18 株式会社東芝 医用画像表示装置
JPS59155238A (ja) * 1983-02-24 1984-09-04 株式会社東芝 Ｘ線ｃｔ装置
JPS602238A (ja) * 1983-06-06 1985-01-08 横河メディカルシステム株式会社 Ｃｔ画像表示装置
JPS6075033A (ja) * 1983-09-30 1985-04-27 株式会社東芝 Ｘ線診断装置
US4563740A (en) * 1983-11-17 1986-01-07 General Electric Company Method and means for automatically variably controlling display parameters
US4879668A (en) * 1986-12-19 1989-11-07 General Electric Company Method of displaying internal surfaces of three-dimensional medical images
US4821213A (en) * 1986-12-19 1989-04-11 General Electric Co. System for the simultaneous display of two or more internal surfaces within a solid object
US4882679A (en) * 1987-11-27 1989-11-21 Picker International, Inc. System to reformat images for three-dimensional display
JP2714164B2 (ja) * 1989-07-31 1998-02-16 株式会社東芝 三次元画像表示装置
US5442375A (en) * 1993-03-25 1995-08-15 Toshiba America Information Systems, Inc. Method and apparatus for identifying color usage on a monochrome display
US6466687B1 (en) * 1997-02-12 2002-10-15 The University Of Iowa Research Foundation Method and apparatus for analyzing CT images to determine the presence of pulmonary tissue pathology
US6748043B1 (en) * 2000-10-19 2004-06-08 Analogic Corporation Method and apparatus for stabilizing the measurement of CT numbers
US8275091B2 (en) 2002-07-23 2012-09-25 Rapiscan Systems, Inc. Compact mobile cargo scanning system
US7963695B2 (en) 2002-07-23 2011-06-21 Rapiscan Systems, Inc. Rotatable boom cargo scanning system
GB0309383D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-ray tube electron sources
US8243876B2 (en) 2003-04-25 2012-08-14 Rapiscan Systems, Inc. X-ray scanners
US8804899B2 (en) 2003-04-25 2014-08-12 Rapiscan Systems, Inc. Imaging, data acquisition, data transmission, and data distribution methods and systems for high data rate tomographic X-ray scanners
GB0309379D0 (en) * 2003-04-25 2003-06-04 Cxr Ltd X-ray scanning
US10483077B2 (en) 2003-04-25 2019-11-19 Rapiscan Systems, Inc. X-ray sources having reduced electron scattering
US8094784B2 (en) 2003-04-25 2012-01-10 Rapiscan Systems, Inc. X-ray sources
US7949101B2 (en) 2005-12-16 2011-05-24 Rapiscan Systems, Inc. X-ray scanners and X-ray sources therefor
US8451974B2 (en) 2003-04-25 2013-05-28 Rapiscan Systems, Inc. X-ray tomographic inspection system for the identification of specific target items
GB0812864D0 (en) 2008-07-15 2008-08-20 Cxr Ltd Coolign anode
GB0309374D0 (en) * 2003-04-25 2003-06-04 Cxr Ltd X-ray sources
US9208988B2 (en) 2005-10-25 2015-12-08 Rapiscan Systems, Inc. Graphite backscattered electron shield for use in an X-ray tube
GB0309371D0 (en) * 2003-04-25 2003-06-04 Cxr Ltd X-Ray tubes
US8837669B2 (en) 2003-04-25 2014-09-16 Rapiscan Systems, Inc. X-ray scanning system
US9113839B2 (en) 2003-04-25 2015-08-25 Rapiscon Systems, Inc. X-ray inspection system and method
GB0525593D0 (en) 2005-12-16 2006-01-25 Cxr Ltd X-ray tomography inspection systems
US8223919B2 (en) 2003-04-25 2012-07-17 Rapiscan Systems, Inc. X-ray tomographic inspection systems for the identification of specific target items
GB0309387D0 (en) * 2003-04-25 2003-06-04 Cxr Ltd X-Ray scanning
GB0309385D0 (en) * 2003-04-25 2003-06-04 Cxr Ltd X-ray monitoring
US6928141B2 (en) 2003-06-20 2005-08-09 Rapiscan, Inc. Relocatable X-ray imaging system and method for inspecting commercial vehicles and cargo containers
JP2005241575A (ja) * 2004-02-27 2005-09-08 Toshiba Corp Ｘ線断層撮影装置および立体透視画像構成装置
SE528089C2 (sv) * 2004-04-30 2006-08-29 Elekta Ab Metod och system för automatiskt förbättrande av användbarheten för en medicinsk bild
US20050244045A1 (en) * 2004-04-30 2005-11-03 Elekta Ab (Publ) Method and system for automatically improving the usability of a medical picture
US7471764B2 (en) 2005-04-15 2008-12-30 Rapiscan Security Products, Inc. X-ray imaging system having improved weather resistance
DE102005019572A1 (de) * 2005-04-27 2006-11-09 Siemens Ag Verfahren zur Auswertung und Darstellung von Röntgenprojektionsbildern und Röntgendurchsichtgerät
US9046465B2 (en) 2011-02-24 2015-06-02 Rapiscan Systems, Inc. Optimization of the source firing pattern for X-ray scanning systems
JP4675753B2 (ja) * 2005-11-11 2011-04-27 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装置
US8111895B2 (en) * 2006-12-06 2012-02-07 Siemens Medical Solutions Usa, Inc. Locally adaptive image enhancement for digital subtraction X-ray imaging
GB0803644D0 (en) 2008-02-28 2008-04-02 Rapiscan Security Products Inc Scanning systems
GB0803641D0 (en) 2008-02-28 2008-04-02 Rapiscan Security Products Inc Scanning systems
GB0809110D0 (en) 2008-05-20 2008-06-25 Rapiscan Security Products Inc Gantry scanner systems
GB0816823D0 (en) 2008-09-13 2008-10-22 Cxr Ltd X-ray tubes
GB0901338D0 (en) 2009-01-28 2009-03-11 Cxr Ltd X-Ray tube electron sources
DE102011003857B4 (de) * 2011-02-09 2016-12-15 Siemens Healthcare Gmbh Verfahren zur Anpassung einer Grauwertfensterung, Recheneinheit, Röntgeneinrichtung und Datenträger
US9218933B2 (en) 2011-06-09 2015-12-22 Rapidscan Systems, Inc. Low-dose radiographic imaging system
JP2013079858A (ja) * 2011-10-04 2013-05-02 Hashima:Kk Ｘ線異物検出装置
EP2952068B1 (fr) 2013-01-31 2020-12-30 Rapiscan Systems, Inc. Système d'inspection de sécurité portable
US11551903B2 (en) 2020-06-25 2023-01-10 American Science And Engineering, Inc. Devices and methods for dissipating heat from an anode of an x-ray tube assembly

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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
US4052618A (en) * 1974-05-07 1977-10-04 E M I Limited Apparatus for examining a body by radiation such as x or gamma radiation
JPS4979645A (fr) * 1972-12-07 1974-08-01
US3868673A (en) * 1973-08-14 1975-02-25 Teletype Corp Display apparatus including character enhancement
JPS521274A (en) * 1975-06-24 1977-01-07 Ito Kikai Seisakusho:Kk Stroke device

Also Published As

Publication number Publication date
JPS53140988A (en) 1978-12-08
FR2387024B1 (fr) 1985-04-26
US4105922A (en) 1978-08-08
DE2815218C2 (fr) 1989-12-28
DE2815218A1 (de) 1978-10-19
JPS6111615B2 (fr) 1986-04-03
GB1599484A (en) 1981-10-07

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