Image analysis – Applications – Biomedical applications
Reexamination Certificate
2009-06-26
2010-12-21
Mehta, Bhavesh M (Department: 2624)
Image analysis
Applications
Biomedical applications
C382S128000
Reexamination Certificate
active
07856134
ABSTRACT:
A method for generating image data relating to a virtually prescribable X-ray tube voltage U3from first and second dual energy CT image data is disclosed. In at least one embodiment, the method includes providing the first and second CT image data; prescribing the virtual X-ray tube voltage U3with U3≠U1and U3≠U2, on the basis of the first and second CT image data for two prescribable base materials A, B; determining in each case a spatial density distribution ρA(x), ρB(x), assigned to the base materials A, B, in the reconstructed object volume, ρ(x)=ρA(x)+ρB(x) holds true for a density ρ(x) of a voxel x in the reconstructed object volume; providing an effective mass attenuation coefficient <αA>U3for the base material A, and an effective mass attenuation coefficient <αB>U3for the base material B, the effective mass attenuation coefficients <αA>U3and <αB>U3respectively being valid for an X-ray spectrum S(E, U3) assigned to the virtual X-ray tube voltage U3; and determining the image data as a third distribution of linear attenuation coefficients μ3(x) in the reconstructed object volume on the basis of the following relationship: μ3(x)=<αA>U3·ρA(x)+<αB>U3·ρB(x).
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Rührnschopf Ernst-Peter
Sedlmair Martin
Stierstorfer Karl
Harness & Dickey & Pierce P.L.C.
Koziol Stephen R
Mehta Bhavesh M
Siemens Aktiengesellschaft
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