WO2002050517A3 - Image reconstruction using multiple x-ray projections - Google Patents

Image reconstruction using multiple x-ray projections Download PDF

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Publication number
WO2002050517A3
WO2002050517A3 PCT/CA2001/001807 CA0101807W WO0250517A3 WO 2002050517 A3 WO2002050517 A3 WO 2002050517A3 CA 0101807 W CA0101807 W CA 0101807W WO 0250517 A3 WO0250517 A3 WO 0250517A3
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WO
WIPO (PCT)
Prior art keywords
image
absorbance
profiles
ray
pixel
Prior art date
Application number
PCT/CA2001/001807
Other languages
French (fr)
Other versions
WO2002050517A2 (en
Inventor
Wido Menhardt
Original Assignee
Cedara Software Corp
Wido Menhardt
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 Cedara Software Corp, Wido Menhardt filed Critical Cedara Software Corp
Priority to AU2002215778A priority Critical patent/AU2002215778A1/en
Publication of WO2002050517A2 publication Critical patent/WO2002050517A2/en
Publication of WO2002050517A3 publication Critical patent/WO2002050517A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material

Abstract

A method for reconstructing two and three dimensional images of objects using X-ray image projections and iterative reconstruction techniques is provided. More specifically, the method provides an image of the object to be corrected. Two or more X-ray absorbance profiles of the image are obtained along two or more different projection directions. These profiles are compared with the corresponding absorbance profiles of the object substantially filled with an X-ray contrast agent and, based on this comparison, the image is corrected using the iterative reconstruction techniques. Before each iteration the pixels of the image are updated so that if the absorbance value of the pixel is below a preselected value then the pixel is set to 0, otherwise the pixel is set to the absorbance value corresponding to the concentration of the X-ray contrast agent within the object. The iteration stops when the difference between the absorbance profiles of the image and the object falls below a preselected value.
PCT/CA2001/001807 2000-12-20 2001-12-19 Image reconstruction using multiple x-ray projections WO2002050517A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002215778A AU2002215778A1 (en) 2000-12-20 2001-12-19 Image reconstruction using multiple x-ray projections

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/742,048 US6470070B2 (en) 2000-12-20 2000-12-20 Image reconstruction using multiple X-ray projections
US09/742,048 2000-12-20

Publications (2)

Publication Number Publication Date
WO2002050517A2 WO2002050517A2 (en) 2002-06-27
WO2002050517A3 true WO2002050517A3 (en) 2003-04-10

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PCT/CA2001/001807 WO2002050517A2 (en) 2000-12-20 2001-12-19 Image reconstruction using multiple x-ray projections

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US (2) US6470070B2 (en)
AU (1) AU2002215778A1 (en)
WO (1) WO2002050517A2 (en)

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Also Published As

Publication number Publication date
AU2002215778A1 (en) 2002-07-01
US6661869B2 (en) 2003-12-09
WO2002050517A2 (en) 2002-06-27
US6470070B2 (en) 2002-10-22
US20020106051A1 (en) 2002-08-08
US20030118151A1 (en) 2003-06-26

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