The present invention relates to systems and methods for detecting biomaterial anomalies in a test subject for diagnosing existing and potential medical conditions. The general technique utilized is to expose a portion of the test subject to low doses of RF electromagnetic energy. Different biomaterials in a test subject may be differentiated and identified by characterizing their electromagnetic properties based on observed parameters, e.g., electromagnetic energy absorbed, thermal energy created, and electromagnetic energy emitted, during irradiation of the test subject. This invention allows for the efficient utilization of multiple frequency bands allowed by the FCC, as well as a more precise distribution of electromagnetic energy to the test subject.