G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 23/04 (2006.01) A61B 6/03 (2006.01)
Patent
CA 2042154
RD-19682 CONE BEAM SCANNING TRAJECTORIES FOR THREE-DIMENSIONAL COMPUTERIZED TOMOGRAPHY DATA ACQUISITION WHERE OBJECT IS LARGER THAN THE FIELD OF VIEW Abstract of the Disclosure A configuration for three-dimensional cone beam computerized tomography imaging which minimizes the incom- pleteness of the data set and, at the same time, avoids cor- rupted data and resulting artifacts when only a portion of an object is imaged, the object being of greater axial extent compared to a cylindrical field of view. At least two circu- lar source scanning trajectories are defined centered on a rotation axis and lying respectively in two endplanes defin- ing the axial extent of the field of view. At least one cone beam x-ray source and at least one corresponding two-dimen- sional array detector are employed to scan the object along the source scanning trajectories, while acquiring cone beam projection data only from rays passing through the field of view. Preferably, at least one additional circular source scanning trajectory is defined, centered on the rotation axis and lying in a plane intermediate the two endplanes.
Eberhard Jeffrey Wayne
Tam Kwok Cheong
Company General Electric
Craig Wilson And Company
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