Varying energy CT imaging method about complicated structural components

For complicated structural components with wide X-ray attenuation ranges, conventional fixed-energy computed tomography (CT) imaging cannot obtain all structural information. This limitation results in a shortage of CT information because the effective thickness of the components along the direction of X-ray penetration exceeds the limit of the dynamic range of the X-ray imaging system. To address this problem, varying ray energy CT imaging method is proposed. In this new method, the tube voltage is adjusted several times with the fixed lesser interval. Then, the fusion of gray consistency and logarithm demodulation are applied to obtain full and lower noise projection with the high dynamic range. Also, an accompanying experiment demonstrates that this new technology can extend the dynamic range of X-ray imaging systems and provide complete representations of the internal structures of complicated structural components.