X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2005-06-07
2005-06-07
Bruce, David V. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
C378S006000, C378S207000
Reexamination Certificate
active
06904118
ABSTRACT:
The present technique provides for the generation of density maps using one or more basis material decomposition tables or functions. The basis material decomposition tables or functions are generated by simulating the system response to various lengths of basis materials using component characteristics of the CT system as well as the attenuation coefficient for the desired basis material. Measured projection data may be processed using the basis material decomposition tables or functions to provide a set of density line-integral projections that may be reconstructed to form a density map or image.
REFERENCES:
patent: 5335260 (1994-08-01), Arnold
patent: 5867553 (1999-02-01), Gordon et al.
patent: 6233304 (2001-05-01), Hu et al.
patent: 03/22861 (2003-07-01), None
LeBlanc James
Pfoh Armin
Wu Xiaoye
Bruce David V.
Fletcher Yoder
General Electric Company
Thomas Courtney
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