| 摘要 |
A radiation source and a radiation detector are located with an object intervening therebetween. A set of radiation blocking plates, each of which has at least one slit, are located between the radiation source and the radiation detector such that the object intervenes between the radiation blocking plates, and such that the slits of the radiation blocking plates are aligned in a straight line with the radiation source. The set of the radiation blocking plates are shifted stepwise in a direction along which radiation having been produced by the radiation source scans the object, such that the state in which the slits of the radiation blocking plates and the radiation source are aligned with one another in the straight line is kept. After each step of the shifting, the radiation source, the set of the radiation blocking plates, and the radiation detector are rotated around the object. Radiation image patterns of the object are recorded during the rotation.
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