| 摘要 |
<p>A method for detecting an anomaly in a biological material is disclosed, comprising the steps of: irradiating the biological material with electromagnetic radiation of at least two different energy levels; measuring the amount of radiation transmitted through said biological material at said energy levels; and determining, for each energy level, a transmission value through the biological material based on the radiation through said biological material. Before or after irradiation of said biological material, a reference material of a predetermined thickness is also irradiated with electromagnetic radiation at said energy levels, and the amount of radiation transmitted through the reference material at said energy levels is determined. For each energy level, a calibration reference value is determined based on the radiation transmitted through said reference material. Further, it is determined for each energy level, a calibrated transmission value based on a ratio between said determined transmission value through the biological material for the energy level and said determined calibration reference value for the energy level. Thereafter, a material value based on a relationship between the calibrated transmission value for said energy levels is determined, and the presence of an anomaly in said biological material is determined based on a comparison between the determined material value and an expected material value for said biological material. A corresponding apparatus is also disclosed.</p> |
