Development of high-energy and high-resolution X-ray CT

This paper introduces a novel high-energy and high-resolution X-ray computed tomography system called eXTRACT. Preliminary experimental testing was performed of the penetration capability and structural resolution achieved by the system, and the results are reported. The X-ray source realized both bremsstrahlung X-rays with an average energy of 1 MeV and the focal size of 100 μm at the same time. Using 970 physical channels of high-energy X-ray line detectors and a modified offset scanning method, the CT reconstruction of 4286 by 4286 pixels were achieved for a single sinogram from a single fan beam scanning. The performance was further investigated by scanning several material standards. The penetration capability of 400 mm or more, represented by a longitudinal dimension of the object, was recorded in case of scanning aluminum. The structural resolution of 0.1 mm by 0.1 mm line and space structure under the field of view size of 300 mm in the diameter is also verified.