Patent ID: 7088799
Filing Date: 2006-08-08
Classification: A61B,G21K

Abstract:
1. A pre-subject filter assembly for a CT imaging system having a detector assembly and a high frequency electromagnetic energy projection source configured to rotate about a subject during an imaging session, the filter assembly comprising: a beam shaping filter having a body defining multiple filtering profiles, the filter rotatable about an axis of rotation that extends through the body; wherein the beam shaping filter includes a first end and a second end, wherein the body extends between the first end and the second end and comprises a plurality of depressions to define a plurality of body diameters defining the multiple filtering profiles; and a controller to cause rotation of the beam shaping filter about the axis of rotation during an imaging session to dynamically filter high frequency electromagnetic energy projected toward the subject as a function of view angle and independent of voltage applied to the high frequency electromagnetic energy projection source.