Can microcalcifications located within breast carcinomas be detected by ultrasound imaging? 
The author succeeded in detecting microcalcifications within breast carcinomas, by ultrasound (US) imaging, at the beginning of 1982, and published the results of his clinical and experimental researches at the Third International Congress on the Ultrasonic Examination of the Breast held on June 10-12, 1983, in Tokyo, Japan.  After that, more detailed clinical evidence was acquired and new experiments, using breast phantoms, were carried out.  This paper introduces an experiment using phantoms which shows that US can detect and identify even 100-500 mu-sized tiny objects in an "ideal" low echoic area similar to microcalcifications within breast carcinomas.  Actual clinical evidence is also presented.