ASIA超医3回
PERSONAL COMPUTER SYSTEM FOR AUTOMATED DIAGNOSIS AND THREE-DIMENSIONAL DISPAY OFPROSTATIC DISEASES. Akira Kimura,MD, Kiyoshi Hirasawa,MD, Toru Okamura,MD,
Masaharu Niizuma,MD, Yoshio Aso,MD. University of Tokyo, Tokyo, Japan.
Previously, we reported on a quantitative analysis of ultrasonogram of the
prostate ( J.Clin.Ultrasound 14:501-507,1986.). In 51 cases with prostatic
cancer, 88 with hypertrophy, 109 with prostatitis, and 174 normal subjects, fiveparameters such as weight, PCAR, and A-P/R-L were calculated from transrectal
ultrasonograms. A discriminant analysis using the five parameters disclosed two variates that were useful to differentiate the disease entities: the variate 1
differentiated cancer and hypertrophy from prostatitis and normal subjects,
while the variate 2 differentiated cancer from hypertrophy.
this paper presents a personal computer system to diagnose prostatic
diseases automatically and to display prostatic contour three-dimensionally fromtransrectal ultrasonograms. The serial tomograms are taken at 5-mm interval. Foreach tomogram, 16 points of the prostatic contour are entered into the personal
computer. The computer calculates the two variates. If the both variates are
positive, the diagnosis of "cancer category" is output on the CTR of the
computer. If only the variate 1 is positive, the diagnosis is "hypertrophy
category". Otherwise, the diagnosis of "normal category" is made.
Simultaneously, the prostatic contour is displayed on the CTR three-
dimensionally by the wire frame method. The prostatic contour of prostatic
cancer is markedly irregular, and that of prostatic hypertrophy is smooth
spherical, while that of a normal case is flat. The three-dimensional display isespecially useful to know the morphological changes of prostatic cancer and
hypertrophy during hormonal therapy.
