ミニコンによるRI画像の補正と強調

概要

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RI data processing system is constructed from central processing TEAC-16 which has the performance of 16 kW core memory and cycle time 660 nsec, combined the scintillation camera (Nuclear Chicago Pho/Gamma HP) on line. The matrix of a digital image is used 64×64,and one image transmission time to a magnetic tape is 400 msec. To get better the corrected RI images than the original ones, we are using some correction techniqes as follows. (1) Correction for a counting loss due to a resolving time which occurs in position computation of the camera, in A-D conversion and in memory storage. (2) Correction for a nonuiform sensitivity of the camera detector. (3) In order to eliminate the noise which caused by the stastistical fluctuation of RI decay, we are using 25 points weighted average. (4) In order to correct a blurred image which is due to the poor resolving power of the camera detector, we are using conrast enhancement by the iterative approximation. From these studies it was found that the iterative approximation must be terminated two times to eliminate the noise emphasis.
公益社団法人日本放射線技術学会の論文
1975-11-01