C-arm calibration method for 3D reconstruction in an imaging sys

Details C-arm calibration method for 3D reconstruction in an imaging sys C-arm calibration method for 3D reconstruction in an imaging sys

1997-12-31

1999-10-05

Bruce, David Vernon

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, A61B 603

Patent

active

059636130

ABSTRACT:
A C-arm calibration method for 3D reconstruction in an imaging system comprising an imaging source and an imaging plane, utilizes a planar transformation for relating voxels in a voxel space and pixels in the imaging plane, and comprises the steps of defining a source coordinate system in reference to the imaging source; defining first and second normal planes in the voxel space, the planes being parallel to one another, neither including the origin of the source coordinate system and being substantially normal to an optical axis from the source to the imaging plane; defining a relationship between the source coordinate system and another coordinate system, herein referred to as a world coordinate system, by a rotation parameter, identifying pixel location coordinates for a respective pixel corresponding to each voxel in each of the first and second normal planes by utilizing the rotation parameter, storing a value of a filtered image at the respective pixel location; and accumulating contributions corresponding to a plurality of image projections so as to thereby reconstruct the each voxel on each of the first and second normal planes.

REFERENCES:
patent: 5764719 (1998-06-01), Noettling
patent: 5852646 (1998-12-01), Klotz et al.
patent: 5864146 (1999-01-01), Karellas

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