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Title:
PHOTON-COUNTING X-RAY COMPUTED TOMOGRAPHY SYSTEM AND SCATTER CORRECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2013/024890
Kind Code:
A1
Abstract:
This photon-counting X-ray CT system comprises: an X-ray tube for generating X-ray photons, the maximum energy of which is a higher energy than the maximum peak energy of characteristic X-rays; an X-ray detection substance for detecting X-ray photons; an attenuation coefficient map-generating means for generating a first attenuation coefficient map corresponding to a first energy region that includes the maximum peak energy of the characteristic X-rays; an attenuation coefficient map-converting means for converting the first attenuation coefficient map to a second attenuation coefficient map of a second energy region different from the first energy region; a simulation execution means for running a scatter simulation on the basis of the second attenuation coefficient map and generating a scattered photon distribution of scattered X-ray photons; and an image reconstruction means for generating prereconstruction data on the basis of the detected X-ray photons corresponding to the second energy region, correcting the prereconstruction data by the scattered photon distribution to generate corrected data, and reconstructing a scatter-corrected image corresponding to the second energy region on the basis of the corrected data.

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Inventors:
MORIYASU KENTA
Application Number:
PCT/JP2012/070833
Publication Date:
February 21, 2013
Filing Date:
August 16, 2012
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Assignee:
TOSHIBA KK (JP)
TOSHIBA MEDICAL SYS CORP (JP)
MORIYASU KENTA
International Classes:
A61B6/03
Foreign References:
JP2006101926A2006-04-20
JP2006214916A2006-08-17
JP2008272476A2008-11-13
Attorney, Agent or Firm:
TOKYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Tokyo international patent firm (JP)
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Claims:



 
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