| 摘要 |
PURPOSE:To facilitate the reduction in a sampling pitch of a projection data with respect to an array pitch of an electrode for fetching signals of a radiation detector, by concurrently using an electrode for applying high voltages as that for fetching signals in combination. CONSTITUTION:Leads 37 and 38 are drawn individually from electrodes of a radiation detector 35 made up of electrodes 2 for applying high voltages and electrodes 3 for fetching signals arranged alternately. The leads 37 and 38 are connected respectively to the inversion input ends of integration circuits 40 and 41 at a data collecting section 39. Then, a positive pole of a high voltage source 5 is connected to a non-inversion input end of the integrated circuits 41 to apply a high voltage to the high voltage applying electrodes 2. This enables the fetching of signals as well from the electrodes for applying high voltages to facilitate the reduction in a sample pitch of a data of the radiation detector thereby permitting a higher spatial resolving power of an X-ray CT apparatus.
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