Among the examination techniques in the neuroradiological field, we discussed about photographic subtraction, brain scanning and RI cisternography. 1) About photographic subtraction, we summarized those which we have reported. 2) Brain scanning was performed by using 1/2 miniscan. By using this method, it is possible to do a high speed scanning, and to gain more information. 3) We tried to use a short half life nuclide, ^<111>In-DTPA in RI cisternography, as a substitute for ^<169>Yb-DTPA, which is ordinarily used, because it gives problems when we discard excreted ^<169>Yb-DTPA in the excretion, By using short half life nuclide in RI cisternography, its clinical application will be widened in the future.
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