Exact volume imaging involving multiple partial scans
View Patent ↗A method for performing an exact volume imaging with a C-arm digital x-ray imaging system by moving the source through two partial circular scans which form a complete source trajectory. The partial circular scans form a complete source trajectory when the plane defined by the C-arm is repositioned for the second scan at an angle equal to the cone angle with respect to the long axis of the patient.
1. A method for obtaining an exact three-dimensional reconstruction of a volume within a patient with C-arm digital x-ray imaging system having a C-arm with an x-ray source at one end and an x-ray detector at the other, comprising the steps of:
defining a cone angle for the volume to be reconstructed;
defining a plane by the source, the C-arm and the detector;
positioning the C-arm such that the plane is orthogonal to the long axis of the patient;
performing a partial circular scan wherein the source rotates by 180 degrees plus the value of the cone angle;
repositioning the C-arm such that the plane forms an angle equal to the cone angle with the long axis;
performing a partial circular scan wherein the source rotates by 180 degrees plus the value of the cone angle; and
calculate the reconstructed volume.