persondosimetrar

Persondosimetrar, often referred to in English as personal dosimetry, is the practice of measuring and recording the ionizing radiation dose received by an individual, typically workers in medical, industrial, or research settings. It relies on personal dosimeters worn on the body to monitor occupational exposure and ensure compliance with regulatory dose limits. The dosimeter may be film-based, thermoluminescent (TLD), optically stimulated luminescence (OSL), or electronic. Film and TLD dosimeters archive dose information for later analysis, while OSL and electronic devices can provide immediate or near-real-time readings.

Workplaces assign dosimeters to personnel working with X-ray, gamma, beta, or neutron sources. Readouts occur at set intervals, and results are used to generate dose records, assess compliance, investigate anomalies, and trigger alarms for high exposure. Calibration and quality assurance ensure accuracy across different radiation fields and energies.

Regulatory frameworks define limits for occupational exposure, often around 20 millisieverts per year averaged over defined periods, with stricter requirements for the fetus or pregnant workers, and additional constraints for long-lived exposures. Organizations maintain centralized dosimetry services to track accumulated dose, ensure timely replacements, and preserve traceability.

Limitations include energy dependence, angular dependence, and delays in readout for passive dosimeters; electronic personal dosimeters offer real-time monitoring but can be subject to interference and battery limits. The practice emphasizes ALARA principles (as low as reasonably achievable) and patient safety in medical settings, and worker protection in radiography, nuclear power, and research.

See also: dosimetry, dosimeter, radiation protection, ALARA.