PURPOSE: An industrial fixed type real-time multi-stage tomographic apparatus using gamma ray is provided to improve the resolution and accuracy of tomographic image information by employing an optical system in which n polygonal layers composed of multiple measurement modules are laminated. CONSTITUTION: An industrial fixed type real-time multi-stage tomographic apparatus using gamma ray comprises an optical system and an image generating unit. In the optical system, n layers in which a plurality of measurement modules(110) are arranged to face a subject are laminated. The image generating unit generates tomographic image information using attenuation information produced from the gamma ray outputted from each measurement module.피검체를 중심으로 대향하도록 복수개의 측정모듈을 배치하는 레이어(layer)를, n개 적층하여 포함하는 광학 시스템부, 및 상기 각 측정모듈로부터 출력되는 감마선원에 의해 산출되는 복수개의 감쇄정보를 이용하여, 단층영상정보를 생성하는 영상 생성부를 포함하는 감마선원을 이용한 단층촬영장치가 개시된다.
