Patent ID: 9204852
Filing Date: 2015-12-08
Classification: A61B

Abstract:
1. A multi-energy X-ray imaging system, comprising: an X-ray source configured to emit X-rays from a focal spot toward an object to be imaged; an X-ray detector configured to produce an electrical signal corresponding to the intensity of the X-rays that reach the X-ray detector after being attenuated by the object; a filtering device comprising an X-ray translucent support structure having a plurality of septa disposed therein at a plurality of fixed positions with respect to the support structure; a controller programmed to acquire a first set of projection data at a first energy spectrum by controlling the X-ray source to emit the X-rays at the first energy spectrum and controlling the position of the filtering device to focally align the plurality of septa with the X-rays emitted from the focal spot, and to acquire a second set of projection data at a second energy spectrum with a mean energy greater than the mean energy of the first energy spectrum by controlling the X-ray source to emit the X-rays at the second energy spectrum and controlling the position of the filtering device to focally misalign the plurality of septa with the X-rays emitted from the focal spot.