[A study of image processing condition of mammography using FCR (Fuji Computed Radiography)]

Image processing conditions of mammography using FCR (Fuji Computed Radiography) to detect mass shadow, marginal finding and microcalcification of breast cancer were examined. The subjects of the examination for mass shadow and marginal finding were 25 cases out of 55 breast cancers operated from December 1986 to August 1988. Three surgeons and two radiologists evaluated processing conditions. The optimum conditions of spatial frequency enhancement were RN(1 or 3) RT(P) RE(1.0) for mass shadow and RN(7) RT(P) RE(2.0) for marginal finding under routine gradational enhancement condition. ROC curves obtained from the phantom with a granule of aluminum were used to optimize image processing condition for microcalcification. It was shown that GT(M)GA(1.0)GC(0.6)RN(9)RT(F)RE(4.0) gave the best detectability among five image processing conditions.