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OwnerKikuo Umegaki, Shinichi Kojima +6inventors
InventorsKikuo Umegaki, Shinichi Kojima, Yuuichirou Ueno, Kensuke Amemiya, Norihito Yanagita, Hiroshi Kitaguchi, Katsutoshi Tsuchiya, Kazuma Yokoi
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In a radiographic inspection device which can shorten the inspection time and which can enhance the spatial resolution of thus obtained image, has two first and second radiation detecting devices each of which comprises several radiation detectors, a collimator device and a collimator moving device. The collimator device incorporates grid-like shield members defining several γ ray passages. Each of the γ ray passages has a cross-sectional area which is greater than that of each of the radiation detectors. The collimator device in the first radiation detecting device is moved in the longitudinal direction through the rotation of a motor in the collimator moving device while the collimator device in the second radiation detecting device is moved in a direction orthogonal to the longitudinal direction through a motor in the collimator moving device. Since the cross-sectional area of the γ ray passage is greater than that of the radiation detector, the sensitivity of detection of γ rays as to the radiation detector is enhanced, thereby it is possible to greatly shorten the inspection time. Further, since the collimator devices are moved by the collimator moving devices, respectively, the spatial resolution by the tomogram can be enhance.
A radiographic inspection apparatus incorporating a collimator device in which a plurality of radiation passages are defined, a plurality of radiation detectors for detecting radiation rays passing through the radiation passages, and a moving device for moving either the plurality of radiation detectors or the collimator device in a direction crossing the center axis of each of the radiation passages, characterized in that each of the radiation passage has a cross-sectional area in the crossing direction, is greater than that of each of the radiation detectors in that direction.
A radiographic inspection apparatus incorporating a collimator device in which a plurality of radiation passages are defined, a plurality of radiation detectors for detecting radiation rays passing through the radiation passages, and a collimator moving device for moving either the plurality of radiation detectors or the collimator device in a direction crossing the center axis of each of the radiation passages, characterized in that the plurality of radiation detectors are faced to the respective radiation passages.
A radiographic inspection apparatus comprising:
A radiographic inspection apparatus incorporating a collimator device in which a plurality of radiation passages are defined, a plurality of radiation detectors for detecting radiation rays passing through the radiation passages, and a moving device for moving the plurality of radiation detectors and the collimator device, relative to each other in a direction crossing the center axis of each of the radiation passages, characterized in that each of the radiation passage has a cross-sectional area in the crossing direction, is greater than that of each of the radiation detectors in that direction.
A radiographic inspection method with the use of a radiographic inspection device incorporating a plurality of radiation detectors, and a collimator device in which a plurality of radiation passages are defined, each of the radiation passages has a cross-sectional area in a direction crossing a center axis of each of the radiation passages is greater than that of each of the radiation detectors in that direction, characterized in that
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