Patent ID: 7501633
Filing Date: 2009-03-10
Classification: A61B,G01T

Abstract:
1. A radiological imaging apparatus, comprising: an imaging apparatus with an opening being formed for insertion of a bed thereinto; and an attenuation correction data creation device, wherein said imaging apparatus includes a plurality of radiation detectors disposed around said opening and a plurality of gamma ray generation means residing between said opening and said radiation detectors as placed at a position nearest to said opening and being disposed in a longitudinal direction of said bed, wherein said plurality of gamma ray generation means respectively comprises gamma ray sources each being a single photon emission nuclear species and being arranged to alternately radiate a gamma ray from any one of said gamma ray generation means to its outside in propagation for said opening, wherein said attenuation correction data creation device is operative to create attenuation correction data based on a detection signal as output from said radiation detectors due to incoming radiation of the gamma ray to be emitted from said gamma ray generation means. wherein each said gamma ray generation means has a housing which is a radiation shield surrounding said gamma ray source, and wherein said housing forms a release window for releasing said gamma ray emitted from said gamma ray source toward said opening; and the radiological imaging apparatus further comprising: a support member for supporting a plurality of housings each being similar in structure to said housing; a rotator with said support member being attached thereto, for rotating to thereby cause said support member to circulate around said opening; and a radiation source holding member with said gamma ray source attached thereto, for rotating within said housing to permit said gamma ray from said gamma ray source to travel toward said opening.