Patent ID: 8755584
Filing Date: 2014-06-17
Classification: A61B,G21K

Abstract:
1. A method for producing a computed tomographic image of a subject comprising: using a radiation source and detector, obtaining radiation transmission information relating to a region of interest in the subject; using the source and detector; obtaining a series of projection images of the region of interest, wherein each projection image is obtained by: collimating the detector by obscuring a portion of the detector area to block radiation scattered from the imaging beam; and while obtaining the series of projection images, filtering the imaging beam to provide a selected filtered beam intensity profile for each projection; wherein, for each projection image, the corresponding selected filtered beam intensity profile is determined based at least in part on the radiation transmission information; wherein the filtration applied to the imaging beam for each image projection is determined at least in part based on the detected transmission values of a respective adjacent projection in the series; and wherein each projection in the series is obtained within about 0.1 seconds or less of the respective adjacent projection.