山根 明文

Akifumi YAMANE

鳥取大学医学部泌尿器科

Department of Urology, Tottori University School of Medicine

キーワード : Prostate, Tissue characterization, Radio frequency signal, Amplitude modulated image, Mean frequency image

Ultrasonic tissue characterized using the textural features of two new images. An amplitude modulated(AM) image and a mean frequency(FM) image were directly constructed by a radio frequency signal. The system was applied to the study of graphite phantom and in vivo prostate. The reproducibility of this system was confirmed by a basic experiment using three kinds of phantoms, each with a different frequency dependent attenuation. Furthermore, this system was applied clinically (normal prostate: 10 cases; benign prostatic hypertrophy: 18 cases; and prostatic cancer: 11 cases) with the transrectal method. A total of 14 parameters for first-order and second-order textural statistics were calculated in this experiment. A significant difference was noted in one parameter between the normal group and the hypertrophy group, and in one parameter between the hypertrophy group and the cancer group concerning the analysis of the AM image (p