Patent ID: 7746974
Filing Date: 2010-06-29
Classification: A61B,G01N

Abstract:
1. A method comprising: emitting first electrons from a cathode toward a first focal spot using an X-ray tube located at a first position; emitting first radiation from the first focal spot toward an object; acquiring a first projection of the object based on the emitted first radiation using a computed tomography radiation detector; moving the first focal spot in a first direction to a second focal spot; emitting second electrons from the cathode toward the second focal spot using the X-ray tube located at the first position; emitting second radiation from the second focal spot toward the object; acquiring a second projection of the object based on the emitted second radiation using the computed tomography radiation detector; determining a table speed to move the object, wherein the table speed is based on a x-direction sampling rate and a z-direction sampling rate; moving the object relative to the X-ray tube in a second direction via a table at the determined table speed, the second direction perpendicular to the first direction; emitting third radiation toward the moved object from the first focal spot using the X-ray tube located at the first position; acquiring a third projection of the moved object based on the emitted third radiation using the computed tomography radiation detector; emitting fourth radiation toward the moved object from the second focal spot using the X-ray tube located at the first position; acquiring a fourth projection of the moved object based on the emitted fourth radiation using the computed tomography radiation detector, generating an image of the object based on the first projection, the second projection, the third projection and the fourth projection; acquiring a two-dimensional image of the object; superimposing the image on a portion of the two-dimensional image; updating the image using additional projections obtained from the X-ray tube located at the first position; and superimposing the updated image on the portion of the two-dimensional image.