| 摘要 |
The invention relates to a method for a dual-energy mammography. The aim of the invention is to be able to detect earlier microcalcifications as precursors of an oncologic tumor in the mammary gland. According to the invention, this is achieved in that a reference pattern with known density, thickness, and effective atomic number distributions is arranged adjacently to the mammary gland. The parameters of the relationship between the atomic number and the difference or the ratio of the logarithms of the number of photons which pass through the mammary gland at two different radiation energies without interaction are determined using the reference pattern. The distribution of the atomic numbers in the mammary gland is presented visually using said relationship. |
