Patent ID: 7683338

Claim:
A radiological imaging system, comprising: a bed for carrying an examinee, a positron emission CT imaging apparatus and an X-ray CT imaging apparatus disposed along a longitudinal direction of said bed, wherein said positron emission CT imaging apparatus includes a plurality of unit substrates including a plurality of semiconductor radiation detectors for detecting a γ-ray emitted from said examinee and an integrated circuit for processing γ-ray detection signals outputted from each of said plurality of semiconductor radiation detectors, said unit substrates being arranged in a direction perpendicular to said longitudinal direction of said bed and around said bed, wherein said semiconductor radiation detectors are disposed on both sides of each of said unit substrates, wherein each of said semiconductor radiation detectors has a laminated structure comprising at least two layers, each layer including a layer of semiconductor material sandwiched with anode and cathode electrodes, said X-ray CT imaging apparatus has an X-ray source for emitting an X-ray to said examinee and a radiation detector for detecting an X-ray emitted from said X-ray source and passed through said examinee, and said bed is shared by said positron emission CT imaging apparatus and said X-ray CT imaging apparatus.