A Quantitative Radiographic Index of Breast ″Density″ Based on a Density Histogram of a Mammogram

Imamura, Keiko (Departments of Radiology, St. Marianna University School Medicine) ;
Ogata, Haruki (Department of Surgery, St. Marianna University School Medicine) ;
Sasaka, Kaoru (Departments of Radiology, St. Marianna University School Medicine) ;
Fukuda, Mamoru (Department of Surgery, St. Marianna University School Medicine) ;
Ehara, Norishige (Departments of Radiology, St. Marianna University School Medicine) ;
Nakajima, Yasuo (Departments of Radiology, St. Marianna University School Medicine) ;
Higashida, Yoshiharu (Kyushu University School of Health Sciences)