This paper, summarizes experiences in the use of the mammograph for the mass screening of breast cancer. The exposure dose per experience was only 1/8.4 (0.21mSv) that of conventional mammography. Application to 243 persons resulted in 95.6% (43/45 patients) of TPR, 57.1% (113/198 patients) of TNR and 1.7% (2/115 patients) of false negative. Although the authors consider that the mammograph has a bright future, a few points for improvement follow herein. It was also confirmed that, in order to promote the accuracy of mass screening of breast cancer, the most important points are to promote photography techniques and decipherment of X-rays.
