PURPOSE: To improve the collection efficiency by providing a supporting arm which can move up and down against a support which can move forward and backward, and a detector which can rotate against the supporting arm.

CONSTITUTION: A whole body bed 13 is inserted between a detector 3 and 4, and a body to be inspected 14 is placed on the bed 13. also, the detectors 3, 4 are set so as to pass through the upper and lower parts of the body to be inspected 14, and by operating the run driving motors 15, 16, a whole body collection is executed. In that case, running of supports 9, 10 can be executed independently, therefore, the two detectors 3, 4 are run in parallel, and the whole body collection can be executed. Also, it becomes also possible that the whole body run is executed by one detector, the run of the other detector is executed manually during that time, and plural sheets of static collections are executed. Moreover, it is also possible that the two detectors 3, 4 are run at a different speed, and run in the opposite direction, and by various mode photographing, the collection efficiency can be improved.