Radiation dosimetry is the measurement and assessment of the absorbed dose of ionizing radiation in a specific material or tissue. It is an important field in radiation protection and medical physics, as it allows for the quantification of radiation exposure and the potential risks associated with it. Dosimetry techniques include the use of dosimeters, such as film badges, thermoluminescent dosimeters, and electronic dosimeters, to measure and monitor radiation levels in various environments and for different purposes, such as in medical imaging, industrial settings, and radiation therapy. The information obtained from radiation dosimetry is used to ensure that radiation doses are kept within safe limits and to optimize radiation treatment plans for patients.