Radiological imaging apparatus

A positron emission tomography apparatus comprising:

• a bed on which a subject is to be laid;
• an image pickup device that is provided with a plurality of semiconductor radiation detectors for detecting γ rays from said subject, said plurality of semiconductor radiation detectors comprising first semiconductor radiation detectors and second semiconductor radiation detectors, said second semiconductor radiation detectors being provided so as to detect γ rays passed through said first semiconductor radiation detectors, said first and second semiconductor radiation detectors, said first and second semiconductor radiation detectors being arranged around said bed and in a direction away from said bed;
• a plurality of γ ray discriminators each connected to each of said first and second semiconductor radiation detectors for generating pulse signals on the basis of γ ray detection signals output from said plurality of semiconductor radiation detectors;
• a signal processor connected to said plurality of γ ray discriminators for coincidence processing said pulse signals;
• and
• a tomogram generator for creating tomogram data of said subject on the basis of positional information of said semiconductor detectors representing an arrived position of a pair of coincidence processed γ rays in said direction away from said bed, said positional information being output information of said signal processor.

A positron emission tomography apparatus comprising:

• a bed on which a subject is to be laid;
• an image pickup device that is provided with a plurality of semiconductor radiation detectors for detecting γ rays from said subject, said plurality of semiconductor radiation detectors being arranged around a hole portion formed in said image pickup device into which said bed is inserted, and said plurality of semiconductor radiation detectors being arranged at different positions in a radius direction of said hole portion;
• a plurality of γ ray discriminators each connected to each of said semiconductor radiation detectors for generating pulse signals on the basis of γ ray detection signals output from said plurality of semiconductor radiation detectors;
• a signal processor connected to said plurality of γ ray discriminators for coincidence processing said pulse signals;
• and
• a tomogram generator for creating tomogram data of said subject on the basis of positional information of said semiconductor radiation detectors representing an arrived position of a pair of coincidence processed γ rays in said direction away from said bed, said positional information being output information of said signal processor.

a positron emission tomography apparatus comprising:

• a bed on which a subject is to be laid;
• an image pickup device that is provided with a plurality of semiconductor radiation detectors for detecting γ rays from said subject, said plurality of semiconductor radiation detectors being laminated and arranged around said bed in a direction away from said bed;
• a plurality of γ ray discriminators each connected to each of said semiconductor radiation detectors laminated for generating pulse signals on the basis of γ ray detection signals output from said plurality of semiconductor radiation detectors;
• a signal processor connected to said plurality of γ ray discriminators for coincidence processing said pulse signals;
• and
• a tomogram generator for creating tomogram data of said subject on the basis of positional information of said semiconductor radiation detectors representing an arrived position of a pair of γ rays detected by said semiconductor radiation detectors laminated in said direction away from said bed, said positional information being output information of said signal processor.

A positron emission tomography apparatus comprising:

• a bed on which a subject is to be laid;
• an image pickup device that is provided with a plurality of semiconductor radiation detectors for detecting γ rays from said subject, said plurality of semiconductor radiation detectors being formed in a plurality of layers and arranged around said bed in a direction away from said bed;
• a plurality of γ ray discriminators each connected to each of said semiconductor radiation detectors layered for generating pulse signals on the basis of γ ray detection signals output from said plurality of semiconductor radiation detectors;
• a signal processor connected to said plurality of γ ray discriminators for coincidence processing said pulse signals;
• and
• a tomogram generator for creating tomogram data of said subject on the basis of positional information of said semiconductor radiation detectors representing an arrived position of a pair of γ rays detected by said semiconductor radiation detectors layered in said direction away from said bed, said positional information being output information of said signal processor.

A method of controlling a positron emission tomography apparatus comprising the steps of:

• detecting radiations radiated from a subject laid on a bed by a plurality of semiconductor radiation detectors, said plurality of semiconductor radiation detectors being laminated and arranged around said bed in a direction away from said bed;
• generating pulse signals by a plurality of γ ray discriminators each connected to each of said semiconductor radiation detectors laminated on the basis of γ ray detection signals output from said plurality of semiconductor radiation detectors;
• coincidence processing said pulse signals by a signal processor connected to said plurality of γ ray discriminators;
• and
• creating tomogram data of said subject by a tomogram generator on the basis of positional information of said semiconductor radiation detectors representing an arrived position of a pair of γ rays detected by said semiconductor radiation detectors layered in said direction away from said bed, said positional information being output information of said signal processor.

A method of controlling a positron emission tomography apparatus comprising the steps of:

• detecting radiations radiated from a subject laid on a bed by a plurality of semiconductor radiation detectors, said plurality of semiconductor radiation detectors being arranged in a plurality of layers around said bed in a direction away from said bed;
• generating pulse signals by a plurality of γ ray discriminators each connected to each of said semiconductor radiation detectors layered on the basis of γ ray detection signals output from said plurality of semiconductor radiation detectors;
• coincidence processing said pulse signals by a signal processor connected to said plurality of γ ray discriminators;
• and
• creating tomogram data of said subject by a tomogram generator on the basis of positional information of said semiconductor radiation detectors representing an arrived position of a pair of γ rays detected by said semiconductor radiation detectors layered in said direction away from said bed, said positional information being output information of said signal processor.