| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To minimize radiation exposure to a subject by minimizing noise variation across a combined image when images acquired using a plurality of alternately irradiating radiation sources to form an overlapping area are combined. <P>SOLUTION: The imaging system (10) includes at least two X-ray sources (40, 42), an X-ray detector assembly (20) and an attenuation filter (100). The at least two X-ray sources (40, 42) are displaced along a z-axis (52) and configured to alternately emit X-ray beams (24, 25). The X-ray detector assembly (20) is configured to detect the X-ray beams (24, 25). The attenuation filter (100) is mounted proximate the at least two X-ray sources (40, 42) and is configured to provide different amounts of X-ray attenuation to the X-ray beams (24, 25) along the z-axis (52). <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
