WO2007110795A3 - Effective dual-energy x-ray attenuation measurement - Google Patents

Effective dual-energy x-ray attenuation measurement Download PDF

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Publication number
WO2007110795A3
WO2007110795A3 PCT/IB2007/050879 IB2007050879W WO2007110795A3 WO 2007110795 A3 WO2007110795 A3 WO 2007110795A3 IB 2007050879 W IB2007050879 W IB 2007050879W WO 2007110795 A3 WO2007110795 A3 WO 2007110795A3
Authority
WO
WIPO (PCT)
Prior art keywords
ray
focus
detector elements
focus point
energy
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.)
Ceased
Application number
PCT/IB2007/050879
Other languages
French (fr)
Other versions
WO2007110795A2 (en
Inventor
Thomas Koehler
Jens-Peter Schlomka
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Intellectual Property and Standards GmbH
Koninklijke Philips Electronics 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 Intellectual Property and Standards GmbH, Koninklijke Philips Electronics NV filed Critical Philips Intellectual Property and Standards GmbH
Priority to EP07735118A priority Critical patent/EP2002286A2/en
Priority to JP2009502268A priority patent/JP2009531108A/en
Priority to US12/293,564 priority patent/US7778383B2/en
Publication of WO2007110795A2 publication Critical patent/WO2007110795A2/en
Publication of WO2007110795A3 publication Critical patent/WO2007110795A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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)
    • 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
    • A61B6/40—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
    • 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
    • A61B6/4028—Arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot resulting in acquisition of views from substantially different positions, e.g. EBCT
    • 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
    • A61B6/48—Diagnostic techniques
    • A61B6/482—Diagnostic techniques involving multiple energy imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/224—Multiple energy techniques using one type of radiation, e.g. X-rays of different energies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/226—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays using tomography
    • 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]
    • A61B6/037—Emission tomography
    • 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

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

Abstract

It is described a method and a CT system for measuring dual-energy X- ray attenuation data of an object. The CT system comprises a rotatable holder, an X-ray source comprising two different X-ray focus points, and an X-ray detection device comprising a plurality of detector elements exhibiting different spectral sensitivities. The method comprises the steps of (a) adjusting the X-ray source such that it emits X-rays originating a first focus point, (b) acquiring first attenuation data separately with first detector elements and with second detector elements, (c) moving the X-ray focus discretely to a second focus point, and (d) acquiring second attenuation data separately with both types of detector elements. Thereby the two focus points are spatially separated from each such that a first beam path originating from the first focus point penetrates a certain voxel within the object and impinges on a first detector element and a second beam path originating from the second X-ray focus point penetrates the same voxel and impinges on a second detector element.
PCT/IB2007/050879 2006-03-29 2007-03-14 Effective dual-energy x-ray attenuation measurement Ceased WO2007110795A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07735118A EP2002286A2 (en) 2006-03-29 2007-03-14 Effective dual-energy x-ray attenuation measurement
JP2009502268A JP2009531108A (en) 2006-03-29 2007-03-14 Efficient dual energy X-ray attenuation measurement
US12/293,564 US7778383B2 (en) 2006-03-29 2007-03-14 Effective dual-energy x-ray attenuation measurement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06111882 2006-03-29
EP06111882.4 2006-03-29

Publications (2)

Publication Number Publication Date
WO2007110795A2 WO2007110795A2 (en) 2007-10-04
WO2007110795A3 true WO2007110795A3 (en) 2008-01-31

Family

ID=38541514

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/050879 Ceased WO2007110795A2 (en) 2006-03-29 2007-03-14 Effective dual-energy x-ray attenuation measurement

Country Status (5)

Country Link
US (1) US7778383B2 (en)
EP (1) EP2002286A2 (en)
JP (1) JP2009531108A (en)
CN (1) CN101410727A (en)
WO (1) WO2007110795A2 (en)

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US7869559B2 (en) * 2006-10-19 2011-01-11 General Electric Company X-ray detector methods and apparatus
US7852979B2 (en) * 2007-04-05 2010-12-14 General Electric Company Dual-focus X-ray tube for resolution enhancement and energy sensitive CT
US8321131B2 (en) * 2007-12-14 2012-11-27 Schlumberger Technology Corporation Radial density information from a Betatron density sonde
US8442184B2 (en) * 2008-06-30 2013-05-14 Koninklijke Philips Electronics N.V. Spectral CT
GB0813560D0 (en) * 2008-07-24 2008-09-03 Bil Solutions Ltd Improvements in and relating to characterisation of radioactive waste
JP5460106B2 (en) * 2009-04-03 2014-04-02 キヤノン株式会社 X-ray imaging apparatus, control method therefor, and computer program
FR2947658B1 (en) * 2009-07-03 2011-07-29 Norbert Beyrard X-RAY IMAGING METHOD AND DEVICE WITH THREE-DIMENSIONAL PROCESSING
US8321179B2 (en) * 2009-07-23 2012-11-27 Sun Nuclear Corporation Multiple axes scanning system and method for measuring radiation from a radiation source
JP2011245048A (en) * 2010-05-27 2011-12-08 Ge Medical Systems Global Technology Co Llc X-ray ct apparatus
IT1405995B1 (en) * 2010-07-09 2014-02-06 Alta Lab S R L SYSTEM AND METHOD FOR X-RAY INSPECTION AND IDENTIFICATION OF THE CHEMICAL COMPOSITION OF MATERIALS
DE102010042683B4 (en) * 2010-10-20 2013-11-14 Siemens Aktiengesellschaft Device and method for generating X-radiation and computer program and data carrier
US20120236987A1 (en) * 2011-03-18 2012-09-20 David Ruimi Multiple energy ct scanner
CA2913350A1 (en) 2012-05-29 2013-12-05 THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARINING/McGILL UNIVERSITY Method and system for calorimetry probe
DE102012211146A1 (en) * 2012-06-28 2014-01-02 Siemens Aktiengesellschaft Method and X-ray system for generating a phase contrast display
CN103674979B (en) * 2012-09-19 2016-12-21 同方威视技术股份有限公司 A kind of luggage and articles CT safe examination system and detector assembly thereof
US20150257718A1 (en) * 2012-09-28 2015-09-17 The Regents Of The University Of California Realtime imaging and radiotherapy of microscopic disease
EP2932469B1 (en) 2012-12-11 2018-10-31 Koninklijke Philips N.V. Method of determining the blood flow through coronary arteries
DE102013104193A1 (en) * 2013-04-25 2014-10-30 Smiths Heimann Gmbh CT X-ray inspection system, in particular for the inspection of objects
CN105242322A (en) * 2014-06-25 2016-01-13 清华大学 Detector device, dual-energy CT system and detection method applying dual-energy CT system
US9442005B2 (en) * 2014-07-30 2016-09-13 Corning Optical Communications LLC Non-contact methods of measuring insertion loss in optical fiber connectors
WO2016038504A1 (en) * 2014-09-08 2016-03-17 Koninklijke Philips N.V. Systems and methods for grating modulation of spectra and intensity in computed tomography
US10099067B2 (en) 2014-12-19 2018-10-16 Sun Nuclear Corporation Radiation therapy dose calculation
US10617891B2 (en) 2015-04-23 2020-04-14 Sun Nuclear Corporation Radiation detector calibration
CN105116462A (en) * 2015-09-08 2015-12-02 同方威视技术股份有限公司 Safety inspection apparatus
WO2018023049A1 (en) 2016-07-28 2018-02-01 Sun Nuclear Corporation Beam angle direction determination
US10918888B2 (en) 2017-02-28 2021-02-16 Sun Nuclear Corporation Radiation therapy treatment verification with electronic portal imaging device transit images
US10610173B2 (en) * 2018-01-16 2020-04-07 General Electric Company System and method to improve spatial resolution in computed tomography
US11278744B2 (en) 2018-09-28 2022-03-22 Sun Nuclear Corporation Systems and methods to account for tilt of a radiation measurement system
DE102019202359A1 (en) * 2019-02-21 2020-08-27 Siemens Healthcare Gmbh Method for determining a relative position of an object with respect to an X-ray recording device
US11600004B2 (en) 2019-07-10 2023-03-07 Sun Nuclear Corporation Image-based radiation therapy quality assurance
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CN115097536B (en) * 2021-07-07 2024-05-14 同方威视技术股份有限公司 Inspection system and method
CN114113158A (en) * 2021-11-08 2022-03-01 上海物影科技有限公司 Target object recognition device and system
CN114295652B (en) * 2021-12-24 2025-03-11 武汉联影生命科学仪器有限公司 A dual-energy filter and dual-energy CT
CN114557715B (en) * 2022-02-21 2025-10-24 北京雷泰腾飞医疗科技有限公司 A dual-source energy spectrum CT high-resolution imaging device and method
US12201850B2 (en) 2022-06-16 2025-01-21 Sun Nuclear Corporation High dose rate radiation therapy systems and dosimetry
CN116088028B (en) * 2022-11-01 2025-07-15 首都师范大学 Effective focus measurement method and device based on dynamic translation of shielding plate
US12544596B2 (en) 2023-03-30 2026-02-10 Sun Nuclear Corporation Adjustable radiation detector support
CN117064424B (en) * 2023-09-25 2024-06-18 北京富通康影科技有限公司 Multi-energy-level energy spectrum CT system
CN117538355A (en) * 2023-11-09 2024-02-09 清华大学 CT scanning system and method
CN119595674B (en) * 2025-02-08 2025-05-30 赛诺威盛科技(北京)股份有限公司 Error correction method, device, equipment and storage medium for CT scanning system

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Also Published As

Publication number Publication date
US7778383B2 (en) 2010-08-17
WO2007110795A2 (en) 2007-10-04
EP2002286A2 (en) 2008-12-17
JP2009531108A (en) 2009-09-03
US20100166139A1 (en) 2010-07-01
CN101410727A (en) 2009-04-15

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