WO2008099314A3 - Apparatus and method for determining high density shadows in projection data - Google Patents

Apparatus and method for determining high density shadows in projection data Download PDF

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Publication number
WO2008099314A3
WO2008099314A3 PCT/IB2008/050458 IB2008050458W WO2008099314A3 WO 2008099314 A3 WO2008099314 A3 WO 2008099314A3 IB 2008050458 W IB2008050458 W IB 2008050458W WO 2008099314 A3 WO2008099314 A3 WO 2008099314A3
Authority
WO
WIPO (PCT)
Prior art keywords
projection data
high density
determining high
projection
shadows
Prior art date
Application number
PCT/IB2008/050458
Other languages
French (fr)
Other versions
WO2008099314A2 (en
Inventor
Thomas Koehler
Peter Forthmann
Holger Schmitt
Original Assignee
Philips Intellectual Property
Koninkl Philips Electronics Nv
Thomas Koehler
Peter Forthmann
Holger Schmitt
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, Koninkl Philips Electronics Nv, Thomas Koehler, Peter Forthmann, Holger Schmitt filed Critical Philips Intellectual Property
Publication of WO2008099314A2 publication Critical patent/WO2008099314A2/en
Publication of WO2008099314A3 publication Critical patent/WO2008099314A3/en

Links

Classifications

    • 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
    • G06T11/005—Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
    • 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
    • A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computerised tomographs
    • A61B6/032—Transmission computed tomography [CT]
    • 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
    • A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4208—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
    • A61B6/4233—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using matrix detectors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/11—Region-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/174—Segmentation; Edge detection involving the use of two or more images
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10072—Tomographic images
    • G06T2207/10081—Computed x-ray tomography [CT]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10116—X-ray image
    • G06T2207/10124—Digitally reconstructed radiograph [DRR]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20212—Image combination
    • G06T2207/20224—Image subtraction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30004—Biomedical image processing

Abstract

The invention relates to an apparatus for determining high density shadows in projection data, wherein the apparatus comprises a first projection data providing unit (1, 2, 3, 6, 7, 8) for providing first projection data, which correspond to a projection through an object having an amount of high density elements. The apparatus comprises further a second projection data providing unit (12) for providing second projection data, which correspond to a projection through a model of the object, in which the amount of high density elements is reduced. The apparatus further comprises a determination unit (13) for determining high density shadows in the first projection data by comparing the first projection data with the second projection data.
PCT/IB2008/050458 2007-02-13 2008-02-08 Apparatus and method for determining high density shadows in projection data WO2008099314A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07102266 2007-02-13
EP07102266.9 2007-02-13

Publications (2)

Publication Number Publication Date
WO2008099314A2 WO2008099314A2 (en) 2008-08-21
WO2008099314A3 true WO2008099314A3 (en) 2009-05-14

Family

ID=39690595

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/050458 WO2008099314A2 (en) 2007-02-13 2008-02-08 Apparatus and method for determining high density shadows in projection data

Country Status (1)

Country Link
WO (1) WO2008099314A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2922028A1 (en) * 2014-03-17 2015-09-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Exploiting residual projection data and reference data for processing data produced by imaging modality
JP2015228923A (en) * 2014-06-03 2015-12-21 株式会社東芝 X-ray computer tomography apparatus and x-ray diagnostic apparatus
US10524756B2 (en) * 2015-08-27 2020-01-07 Varian Medical Systems International Methods and systems for image artifacts reduction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008586A2 (en) * 2003-07-18 2005-01-27 Koninklijke Philips Electronics N.V. Metal artifact correction in computed tomography
US20060020200A1 (en) * 2004-07-08 2006-01-26 Medow Joshua E Artifact-free CT angiogram

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008586A2 (en) * 2003-07-18 2005-01-27 Koninklijke Philips Electronics N.V. Metal artifact correction in computed tomography
US20060020200A1 (en) * 2004-07-08 2006-01-26 Medow Joshua E Artifact-free CT angiogram

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BAL M ET AL: "Metal artifact reduction in CT using tissue-class modeling and adaptive prefiltering", MEDICAL PHYSICS AIP FOR AMERICAN ASSOC. PHYS. MED USA, vol. 33, no. 8, August 2006 (2006-08-01), pages 2852 - 2859, XP012092215, ISSN: 0094-2405 *
TOMIZAWA M ET AL: "Improvement of X-ray CT image quality by use of prior information", SYSTEMS AND COMPUTERS IN JAPAN SCRIPTA TECHNICA USA, vol. 30, no. 11, October 1999 (1999-10-01), pages 67 - 76, XP002520421, ISSN: 0882-1666 *

Also Published As

Publication number Publication date
WO2008099314A2 (en) 2008-08-21

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