WO1998023208A3 - Computer tomography device for volume scanning - Google Patents

Computer tomography device for volume scanning Download PDF

Info

Publication number
WO1998023208A3
WO1998023208A3 PCT/IB1997/001419 IB9701419W WO9823208A3 WO 1998023208 A3 WO1998023208 A3 WO 1998023208A3 IB 9701419 W IB9701419 W IB 9701419W WO 9823208 A3 WO9823208 A3 WO 9823208A3
Authority
WO
WIPO (PCT)
Prior art keywords
density profiles
computer tomography
tomography device
scanning plane
detector system
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/IB1997/001419
Other languages
French (fr)
Other versions
WO1998023208A2 (en
Inventor
Jan Timmer
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
Philips Norden AB
Original Assignee
Philips Electronics NV
Philips Norden AB
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 Electronics NV, Philips Norden AB filed Critical Philips Electronics NV
Priority to JP52446698A priority Critical patent/JP4489845B2/en
Priority to EP97909546A priority patent/EP0910280B1/en
Priority to DE69728397T priority patent/DE69728397T2/en
Publication of WO1998023208A2 publication Critical patent/WO1998023208A2/en
Publication of WO1998023208A3 publication Critical patent/WO1998023208A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T12/00—Tomographic reconstruction from projections
    • G06T12/10—Image preprocessing, e.g. calibration, positioning of sources or scatter correction
    • 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
    • A61B6/027—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

A computer tomography device includes an X-ray source (1) for irradiating an object (2) by means of X-rays from a plurality of directions, a detector system (3) for measuring density profiles of the object from a plurality of directions, and a reconstruction unit (23) for deriving an image signal from the density profiles. During the measurement of the density profiles, the X-ray source (1) and the detector system (3) and the object (2) are displaceable relative to one another in a longitudinal direction which extends transversely of the X-rays. The detector system (3) comprises an asymmetrical system of detectors and the density profiles are measured through at least 4 π radians. The computer tomography device comprises notably a data processing unit which is arranged to select a scanning plane and to compute computed density profiles in the scanning plane from respective measured density profiles which have been measured all around the patient, to both sides of the scanning plane.
PCT/IB1997/001419 1996-11-27 1997-11-10 Computer tomography device for volume scanning Ceased WO1998023208A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP52446698A JP4489845B2 (en) 1996-11-27 1997-11-10 Computer tomography for volumetric scanning
EP97909546A EP0910280B1 (en) 1996-11-27 1997-11-10 Computer tomography device for volume scanning
DE69728397T DE69728397T2 (en) 1996-11-27 1997-11-10 COMPUTER-CONTROLLED TOMOGRAPH FOR VOLUME SENSING

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US75936896A 1996-11-27 1996-11-27
US08/759,368 1996-11-27
EP97203222.1 1997-10-15
EP97203222 1997-10-15

Publications (2)

Publication Number Publication Date
WO1998023208A2 WO1998023208A2 (en) 1998-06-04
WO1998023208A3 true WO1998023208A3 (en) 1998-08-20

Family

ID=26146962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/001419 Ceased WO1998023208A2 (en) 1996-11-27 1997-11-10 Computer tomography device for volume scanning

Country Status (4)

Country Link
EP (1) EP0910280B1 (en)
JP (1) JP4489845B2 (en)
DE (1) DE69728397T2 (en)
WO (1) WO1998023208A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285732B1 (en) * 1999-11-16 2001-09-04 General Electric Company Methods and apparatus for adaptive interpolation reduced view CT scan
US20070127621A1 (en) * 2003-10-14 2007-06-07 Michael Grass Asymmetric csct
US7359478B2 (en) * 2004-11-18 2008-04-15 Toshiba Medical Systems Corporation Method for restoring truncated helical cone-beam computed tomography data
US9418819B2 (en) 2013-09-06 2016-08-16 Kla-Tencor Corporation Asymmetrical detector design and methodology
CN104545976B (en) * 2014-12-30 2017-04-19 上海优益基医疗器械有限公司 Computer body layer photographing method and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403289A (en) * 1979-11-23 1983-09-06 U.S. Philips Corporation Method and device for computed tomography
US5164973A (en) * 1990-01-05 1992-11-17 Hitachi Medical Corporation Projection detecting apparatus for computer tomography

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403289A (en) * 1979-11-23 1983-09-06 U.S. Philips Corporation Method and device for computed tomography
US5164973A (en) * 1990-01-05 1992-11-17 Hitachi Medical Corporation Projection detecting apparatus for computer tomography

Also Published As

Publication number Publication date
DE69728397T2 (en) 2005-02-24
JP2000506766A (en) 2000-06-06
JP4489845B2 (en) 2010-06-23
EP0910280A2 (en) 1999-04-28
WO1998023208A2 (en) 1998-06-04
DE69728397D1 (en) 2004-05-06
EP0910280B1 (en) 2004-03-31

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