Title:
X-RAY CT IMAGE RECONSTRUCTION APPARATUS, X-RAY CT IMAGE RECONSTRUCTION METHOD, AND X-RAY CT APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/221673
Kind Code:
A1
Abstract:
According to the present invention, a base material thickness projection estimation value (124) and a base material thickness projection estimation error value (125) are estimated for M (M≤N) pieces of base materials on the basis of measured count projection values (121) obtained through N energy windows of a subject; and the base material thickness projection estimation value (124) is updated so as to increase the likelihood, based on the concurrent probability density, of all X-ray projection paths based on the base material thickness projection estimation error value (125), and then a resultant base material thickness projection second assumption value (127) is back-projected to obtain a base material density image estimation value (128).
Inventors:
YOKOI KAZUMA (JP)
Application Number:
PCT/JP2017/020708
Publication Date:
December 28, 2017
Filing Date:
June 02, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
A61B6/03
Foreign References:
| US20060109949A1 | 2006-05-25 | |||
| JP2009543603A | 2009-12-10 | |||
| JP2010082031A | 2010-04-15 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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