Radiological imaging system

Abstract

The radiological imaging system which can improve an energy resolution and perform a diagnosis with high accuracy includes a bed for carrying an examinee H, first and second imaging apparatuses and disposed along the longitudinal direction of the bed. The first imaging apparatus has a plurality of semiconductor radiation detectors for detecting γ-rays emitted from the examinee H, arranged around the bed, the second imaging apparatus has an X-ray source for emitting X-rays to the examinee H and a radiation detector for detecting X-rays which have been emitted from the X-ray source and passed through the examinee H, and the bed is shared by the first imaging apparatus and the second imaging apparatus.

1 . A radiological imaging system, comprising: 
 a bed for carrying an examinee;    first and second imaging apparatuses disposed along a longitudinal direction of the bed,    wherein the first imaging apparatus has a plurality of first semiconductor radiation detectors arranged around the bed to detect a γ-ray,    the second imaging apparatus has an X-ray source for emitting an X-ray and a radiation detector for detecting an X-ray emitted from the X-ray source, and    the bed is shared by the first imaging apparatus and the second imaging apparatus.    
   
   
       2 . The radiological imaging system according to  claim 1 , wherein the radiation detector of the second imaging apparatus is a second semiconductor radiation detector.  
   
   
       3 . The radiological imaging system according to  claim 1 , wherein the first imaging apparatus is formed with a small size than the second imaging apparatus and is disposed before the second imaging apparatus in the longitudinal direction of the bed.  
   
   
       4 . The radiological imaging system according to  claim 2 , wherein the second imaging apparatus has the two or more second semiconductor radiation detectors arranged along the longitudinal direction of the bed.  
   
   
       5 . The radiological imaging system according to  claim 1 , further comprising an integrated circuit for processing radiation detection signals outputted from the plurality of first semiconductor radiation detectors, and a tomographic information creation apparatus for creating tomographic information by using second information obtained based on first information outputted from the integrated circuit, 
 wherein the first imaging apparatus has the plurality of first semiconductor radiation detectors and a plurality of unit substrates, each including the integrated circuit.    
   
   
       6 . The radiological imaging system according to  claim 5 , wherein the integrated circuit comprises an analog integrated circuit for processing the radiation detection signal, an AD converter for converting an analog signal, which is an output of the analog integrated circuit, into a digital signal, and a digital integrated circuit for processing the signal having been subjected to AD conversion.  
   
   
       7 . The radiological imaging system according to  claim 6 , wherein the first semiconductor radiation detectors, the analog integrated circuit, the AD converter, and the digital integrated circuit are arranged in this order from one end of the unit substrate to the other end along the longitudinal direction of the unit substrate.  
   
   
       8 . The radiological imaging system according to  claim 5 , wherein the unit substrate includes first and second substrates, 
 the first substrate has at least the semiconductor radiation detectors, and    the second substrate has at least the integrated circuit.    
   
   
       9 . The radiological imaging system according to  claim 1 , wherein the first imaging apparatus is a positron emission CT.  
   
   
       10 . The radiological imaging system according to  claim 9 , wherein the positron emission CT is a 3D-specific positron emission CT having no septa for 2D imaging or radiation source for adsorption correction.  
   
   
       11 . The radiological imaging system according to  claim 1 , wherein the first semiconductor radiation detector has a semiconductor region for interacting with a radiation to generate charge, an anode electrode and a cathode electrode are opposed to each other via the semiconductor region, a distance between the anode electrode and the cathode electrode or a thickness of the semiconductor region between the anode electrode and the cathode electrode is  0 . 2  to  2 mm.  
   
   
       12 . The radiological imaging system according to  claim 11 , wherein a distance between the electrodes or a thickness of the semiconductor region is 0.5 to 1.5 mm.  
   
   
       13 - 16 . (canceled)  
   
   
       17 . The radiological imaging system according to  claim 6 , wherein the analog integrated circuit amplifies a signal, and the digital integrated circuit generates time information.  
   
   
       18 - 24 . (canceled)