| 摘要 |
PURPOSE: To easily analyze the composition of an object on the basis of a CT image by processing data available from the irradiation with an X-ray for reconstituting an image, obtaining a line absorption coefficient for every picture element, multiplying a volume element by the volume size of one volume element for obtaining a density spectrum for the change of a density parameter. CONSTITUTION: A signal detected with an array detector 2, after amplified with a signal processing circuit 7, is A/D converted and stored in a memory 8. A parameter regarding the photographing condition of a specimen 3, a parameter regarding the detector 2 and the like are sent to a control device 10 via an input device 11, and stored in the memory 8. Once an output signal from the detector 2 is stored in the memory 8, an arithmetic operation device 9 performs a calculation for reconstituting an image, according to an instruction from the device 10. The device 9 performs a process for converting a line absorption coefficient into density, and obtains the volume of the cross section of the specimen 3 corresponding to the pixel of a CT tomography. In addition, the device 9 prepares a density spectrum, and analyzes the composition of an object referring to the spectrum. |
