Radiation biodosimetry is the field of study that focuses on measuring and assessing the amount of radiation exposure a person has received. This can be important in the event of a nuclear accident, radiological emergency, or terrorist attack involving radioactive materials. Biodosimetry methods can include the analysis of biological samples such as blood, urine, or tissue to determine the level of radiation exposure and assess potential health risks. This information can help guide medical treatment decisions and inform public health response efforts in the aftermath of a radiation incident.