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- W2059919902 abstract "In this paper, we describe the development and performance evaluation of a 3-dimentional (3-D) high-resolution x-ray microtomography (micro-CT) system. Unlike a conventional micro-CT, the developed system uses a flat-panel detector as a digital x-ray imager. The detector is a CsI:Tl (thallium-doped cesium iodide) scintillator coupled to an active-matrix photodiode array with a pixel pitch of 50 [μm]. Without geometric magnification, the spatial resolution of the detector is 7 [lp/mm] at 10 [%] of MTF (modulation-transfer function). The overall efficiency of the detector for the input x-ray signal-to-noise ratio (SNR) has been measured to be about 50 [%] with the x-ray source operating at 60 [kVp] and 1-mm-thick Al filtration. For fast 3-D cone-beam image reconstruction, the Feldkamp algorithm has been realized in a distributed parallel processing system composed of multiple personal computers. The signal and noise properties in tomograms have been measured with quantitative phantoms and the measurement results are found to conform well to the theoretical models. From the measurements, it has been also found that the spatial resolution in a tomogram is almost determined by the detector resolving power. Some high-resolution imaging results are shown to demonstrate the capability of the developed system in bio-medical and industrial applications." @default.
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- W2059919902 date "2004-08-01" @default.
- W2059919902 modified "2023-10-14" @default.
- W2059919902 title "Development and Characterization of a Flat-Panel Detector-Based Microtomography System" @default.
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- W2059919902 doi "https://doi.org/10.4028/www.scientific.net/kem.270-273.245" @default.
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