What is the purpose of radiation filters?

Radiation filters serve the purpose of reducing stray radiation, which is vital in various applications, including medical imaging and radiation therapy. These filters are designed to selectively absorb or scatter certain types of radiation, thereby minimizing unwanted exposure to non-target areas or tissues. In medical settings, for example, filters can help concentrate the therapeutic dose of radiation on the tumor while protecting surrounding healthy tissues from excess radiation. This enhances the safety and effectiveness of the procedure.

The other choices do not accurately represent the function of radiation filters. Enhancing radiation levels or amplifying signals does not align with the focus of radiation filters, which are more about protection and precision. Additionally, causing radiation reflections is not a typical role of filters, as their main design is to manage and control the exposure rather than reflect radiation.