Fast X-ray Digital Imager for High-Speed Phase-Contrast X-ray Imaging

概要

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A fast X-ray digital imager was developed to perform high-speed phase-contrast X-ray imaging. The imager consists of a scintillator, a transferring optical fiber, and a high-speed interlined charge-coupled device (CCD) based camera. The field of view of the imager was $50\times 33$ mm2 with $4008\times 2650$ pixels, and the maximum frame rate was 1.6 frame/s. The performance tests of the imager were performed using synchrotron radiation, and the results showed that the detection efficiency was 100% and the modulation transfer function (MTF) was 0.6 for 10 cycle/mm. We also performed the feasibility tests of high-speed phase-contrast computed tomography with an imaging system fitted with an X-ray interferometer and the imager. A clear three-dimensional image of a rat kidney was obtained with a 10-min measurement period. The density resolution was also found to be approximately 1.7 mg/cm3.
2007-03-15