PROBLEM TO BE SOLVED: To provide a tomography system capable of further reducing physical and mental constraint of a subject placed in a measurement space of a gantry.SOLUTION: A tomography system 1 comprises a measurement unit 10, a concave mirror 20, an optical system 30, an imaging unit 40, and a processing unit 50. The concave mirror 20 is arranged in a measurement space S and comprises a reflection surface facing a predetermined axis Ax. The reflection surface has a curvature in a cross section perpendicular to the predetermined axis Ax. The optical system 30 compensates for distortion of an image formed when light emitted from a subject 90 is reflected by the concave mirror 20. The imaging unit 40 is arranged outside the measurement space S and images the image whose torsion has been compensated for by the optical system 30. The processing unit 50 detects a body motion of the subject 90 based on the image imaged by the imaging unit 40, corrects measurement data acquired by the measurement unit 10 on the basis of the body motion detection result, and reconstructs a tomographic image of the subject 90 based on the corrected measurement data.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT
