Patent ID: 7706508
Filing Date: 2010-04-27
Classification: G21K,Y10T

Abstract:
1. An x-ray beam chopper for a radiographic imaging apparatus, the chopper comprising: a rotatable frame having a first length along an axis of rotation, the rotatable frame having a first x-ray transmission window and a second x-ray transmission window opposite the first x-ray transmission window, the first and second transmission windows formed in and passing through a wall of the rotatable frame and having a second length that is less than the first length of the rotatable frame, the first and second windows formed to allow free transmission of x-rays therethrough when the rotatable frame is at a first angular orientation with respect to the imaging apparatus; wherein the frame comprises four x-ray transmission windows and four x-ray filtering windows, the four x-ray transmission windows including the first x-ray transmission window and the second x-ray transmission window; and wherein the four x-ray filtering windows are integrally formed with the rotatable frame.