Patent ID: 8233966
Filing Date: 2012-07-31
Classification: A61B

Abstract:
1. A method for generating an image of a body region of a living subject, said body region exhibiting movement due to respiration of the subject, said method comprising the steps of: acquiring an electrical respiration signal from the subject that tracks said respiration of the subject, said respiration signal having a continuously changing amplitude; emitting x-ray radiation into said body region, and detecting said x-ray radiation after passage through said body region, from a plurality of different projection directions, to acquire a plurality of x-ray projections of said body region, and modulating an intensity of said x-ray radiation from said x-ray source during acquisition of said x-ray projections to acquire one of said projections with said intensity set at a predetermined value at a time coinciding with a first value of said amplitude and, to acquire another of said x-ray projections with said intensity set at a value that is decreased relative to said predetermined value, at a time coinciding with a second value of the amplitude of said respiration signal; and reconstructing an image of said body region of the subject from x-ray projections in said plurality of said x-ray projections that include said one of said x-ray projections and said another of said x-ray projections.