Memorandum from the British Committee on Radiation Units and Measurements. Quantities for reporting the calibration of therapy-level dosemeters in photon beams.
It is proposed that existing primary standards of exposure continue to be operated as at present; in-air comparison of secondary standards will be used to determine an exposure calibration, quoted in the SI unit C kg-1. A derived calibration factor for absorbed dose will be supplied for use with the secondary-standard chamber in a water phantom under specified conditions. Secondary-standardizing laboratories will be able to calibrate field instruments, scaled in grays, in terms of absorbed dose to water under reference conditions appropriate to the particular radiation quality.
D002138:Calibration; D006801:Humans; D007394:International System of Units; D008722:Methods; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation* / Q000592:standards; D012015:Reference Standards; D006113:United Kingdom; D014894:Weights and Measures