| 摘要 |
<P>PROBLEM TO BE SOLVED: To reconfigure an image without artifact, while making the best use of a noise gain of a successive approximation method, in imaging with a small dose. <P>SOLUTION: A radiation source 10 is controlled to emit radiation of a first dose at a part of imaging angles, while the radiation source 10 is controlled to emit radiation of a second dose lower than the first dose at photographing angles other than the above. Based on a first radiation image signal output from a radiation image detector 11a by irradiation with the radiation of the first dose and a second radiation image signal output from the radiation image detector 11a by irradiation with the radiation of the second dose, an analytical method is used for reconfiguring an initial image. Based on the reconfigured initial image and the first radiation image signal, a statistical method is used for reconfiguration to form a tomographic image of a subject. <P>COPYRIGHT: (C)2012,JPO&INPIT |
