Apparatus for scatter reduction for CT imaging and method of fabricating same

摘要

A collimator for an imaging system includes a first region comprising a first one-dimensional array of apertures along a channel direction, and a second region comprising a second one-dimensional array of apertures along the channel direction, wherein an aspect ratio of the apertures of the first region is greater than an aspect ratio of the second region.

主权项

1. A collimator for an imaging system comprising:
a first region comprising a plurality of planar collimating plates arranged to form a first one-dimensional array of apertures along an x-direction of the imaging system; a second region comprising a plurality of planar collimating plates arranged to form a second one-dimensional array of apertures along the x-direction, wherein an aspect ratio of the apertures of the first region is greater than an aspect ratio of the second region; and a third region comprising a plurality of planar collimating plates arranged to form a third one-dimensional array of apertures along the x-direction; wherein a first boundary is formed between the first region and the second region and a second boundary is formed between the first region and the third region; wherein the first region includes a centermost channel in the x-direction, such that the first region collimates x-rays that pass through an isocenter of the imaging system; wherein the second region is offset from the first region in the x-direction such that the second region does not include the centermost channel but is positioned to collimate x-rays that pass off-center from the isocenter of the imaging system; and wherein the first boundary and the second boundary are asymmetrically positioned in the x-direction such that the first boundary is a distance from the centermost channel that is different from a distance between the second boundary and the centermost channel.