Title: Asymmetric axial filter for pet imaging systems
Application Number: 200580002486 Application Date: 2005.01.05
Publication Number: 1910475 Publication Date: 2007.02.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01T1/29
Applicant(s) Name: Koninkl Philips Electronics NV Address:
Inventor(s) Name: Gagnon Daniel;Kolthammer Jeffrey A.
Attorney & Agent: gu shan liu jie
Abstract:
    A radiographic imaging system (10) includes an array of detectors (16) for detecting emission radiation emitted from a subject (14). The detectors (16) are arranged around a circular bore (18), defining a field of view of the imaging system (10). End shields (40) are disposed at an entrance and at an exit of the axial field-of-view (18) defining a subject receiving aperture (46). One or more septa (50), partially covering the circumference, shields the detectors (16) from the radiation originating outside of the axial field-of-view (18) as well as the body scattered radiation. Septa (50) are spread out sparsely across the field of view such that a ratio of the area shielded by the septa (50) to the field of view is negligible. The patient aperture (46) is increased without compromising the 3D imaging.
Time: 10