Showing papers by "Jumpei Tsujiuchi published in 1984"
TL;DR: In this paper, the excess optical path difference due to an off-axis scatterpoint and its influence on the desired interferogram in a scatter plate interferometer are discussed, and a limit to the aperture of the scatter plate is proposed.
12 citations
TL;DR: In this article, a simple and convenient technique for making a scatter-plate to be used as a component of a scatterplate interferometer is proposed, and wide-angle and high-contrast interference patterns are obtained.
7 citations
TL;DR: A Fourier domain analysis of dual-sampling region-of-interest x-ray tomography is shown and a method to decrease the artifacts caused by the undersampling errors is proposed.
Abstract: This paper shows a Fourier domain analysis of dual-sampling region-of-interest x-ray tomography and proposes a method to decrease the artifacts caused by the undersampling errors. Computer simulation is also presented.
6 citations
TL;DR: In this article, the effect of Young's fringes due to symmetry error in the speckle distribution and their influence on the desired interferogram in a scatter plate interferometer is discussed.
5 citations
TL;DR: To increase the detection efficiency and improve the spatial resolution, a coded-aperture imaging method is applied to nuclear medicine, which consists of nine pinholes arranged in a square grid.
Abstract: To increase the detection efficiency and improve the spatial resolution, a coded-aperture imaging method is applied to nuclear medicine. The aperture consists of nine pinholes arranged in a square grid. Three kinds of coding are sequentially used to record the same number of projections including parallax and overlap. The overlapped images are partially separated, and good tomograms of a ring phantom and a human myocardium are reconstructed using a modified backprojection algorithm with variable damping factor.
3 citations