Systems and methods for X-ray imaging

摘要

X-ray imaging systems are provided that include an X-ray source and an X-ray detector. A filtering device is positioned between the X-ray source and the X-ray detector and includes one or more micro-filters each adapted to transition between an X-ray filtering position and an X-ray non-filtering position. A controller is programmed to control operation of the micro-filters.

主权项

1. A multi-energy X-ray imaging system, comprising:
an X-ray source configured to emit X-rays toward an imaging volume; 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 passing through the imaging volume; a filtering device comprising an array of micro-filters each configured to transition between an X-ray filtering position and an X-ray non-filtering position, and being positioned between the X-ray source and the X-ray detector; and a controller programmed to acquire a first set of projection data when applying a first energy spectrum by controlling the X-ray source to emit the X-rays with the first energy spectrum and controlling one or more of the micro-filters to be in the non-filtering position, and to further acquire a second set of projection data when applying 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 one or more of the micro-filters to be in the filtering position.