| 摘要 |
PURPOSE:To make it possible to freely alter a separation energy level, by providing a circuit system for dividing the signal electrode plate of a radiation detector into a plurality of ones and capable of freely distributing the signal currents of the divided electrode plates to a plurality of current amplifiers. CONSTITUTION:In a radiation detector arranged in opposed relation to an X-ray generation apparatus, a plurality of bias electrode plates 11 and a signal electrode plate 10 are alternately provided in a parallel or radial state and the signal electrode plate 10 is divided into three or more of electrode plates 10-1-10-6. Negative or positive high voltage is applied to the bias electrode plates 11 and the signal currents from the signal electrode plates 10-1-10-6 are cone collected to a current distributor (multiplexer) 21 and distributed to two or more of current amplifiers 20-1, 20-2 to be inputted to a signal processing apparatus. By this method, a separation energy level can be set to a proper value corresponding to an object to obtain a good tomographic image.
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