Tissue-to-air ratio

The Tissue-to-Air Ratio (TAR) is a concept used in radiation therapy and dosimetry, particularly in the context of calculating the dose of radiation that is delivered to tissues in comparison to air. This ratio is important for understanding how radiation interacts with different materials, particularly when assessing the distribution of radiation energy in different media. In radiation therapy, it is crucial to know how much radiation is absorbed by the target tissue versus the surrounding air, as this impacts the effectiveness of the treatment.