Calibration Service for ¹⁹²Ir High Dose Rate (HDR) Brachytherapy Dosemeters

Well chambers

NPL's ¹⁹²Ir HDR brachytherapy calibration service is for ionisation chambers used as secondary standards or instruments required for measurement of the greatest accuracy. Calibration of either an ionisation chamber alone or of a complete system including an electrometer is available.

Service Features

• Calibration directly against the NPL air kerma primary standard
• Reference air kerma rate (RAKR) of the ¹⁹²Ir source up to 50 mGy/h

Specification and Availability

Thimble chamber calibration jig

• Calibration of well-type (re-entrant) chambers suitable for HDR sources
• Calibration of thimble chambers with customer provided calibration jig
• Electrometer calibration (charge or current calibration)
• Calibrations are normally carried out in spring, and are undertaken using a microSelectron ¹⁹²Ir HDR source
• Calibration conforms to IPEM Code of Practice (2010)

For more information, please contact Thorsten Sander or our Radiation Dosimetry Team

Calibration Service for Low Dose Rate (LDR) Brachytherapy Sources

Fidelis secondary standard
radionuclide calibrator

NPL's LDR brachytherapy service includes the calibration of ¹²⁵I seeds and ¹⁹²Ir wires and pins. The sources are calibrated with the Fidelis secondary standard radionuclide calibrator.

Service Features

• Source calibration traceable to the NPL air kerma primary standard

Specification and availability

• Source calibrations in terms of μGy/h at 1 m or MBq
• Calibration of ¹²⁵I seeds and ¹⁹²Ir wires and pins, including ¹²⁵I seeds (e.g. IMC 6711 OncoSeed^TM, IMC 7000 RAPIDStrand^TM)and ¹⁹²Ir wires and pins (e.g. Amersham ICW-series)
• Calibrations of other source types/configurations possible
• Calibrations are available by arrangement throughout the year

Contact

Customer Services tel: +44 20 8943 8695
E-mail: radioactivity@npl.co.uk