dosimetry - TITLE

BIPM technical services: Radiation Dosimetry

dosimetry - INTRO

The BIPM services for radiation dosimetry are the foundation of measurements world-wide, enabling patients to have confidence in radiotherapy and medical imaging procedures, and radiation workers to have confidence in their safety.

The BIPM holds a set of high-accuracy primary standard instruments which set the international reference value - in effect, the world standard.

Comparison and calibration services are available for air kerma and absorbed dose to water for a carefully chosen set of energies of photon radiation, so that metrology institutes can validate their primary standards via comparisons, or obtain traceability to the SI via calibrations over a wide energy range.

The BIPM maintains primary standards for the determination of the quantity air kerma in x-ray beams with generating potentials in the range from 10 kV to 250 kV and in 137Cs and 60Co gamma-ray beams.

The BIPM maintains primary standards for the determination of the quantity absorbed dose to water in x-ray beams with generating potentials in the range from 100 kV to 250 kV , in a 60Co gamma-ray beam and in high energy x-ray beams in the range from 6 MV to 18 MV.

Comparisons of national primary standards are available for a series of reference radiation qualities covering diagnostic and therapy radiation beams. Calibrations of national secondary standards are made at the same radiation qualities.

Primary dosimetry standard.png

Primary dosimetry standard

Ionizing Radiation - contact Dosimetry

Contact

dosimetry(a)bipm.org

BIPM Ionizing Radiation Department - Radiation Dosimetry

dosimetry - reference conditions

Reference conditions

Rapport BIPM-2024/04

Measuring conditions and uncertainties for the comparison and calibration of national dosmetric standards at the BIPM