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The development of a new primary standard for X-ray emitting electronic brachytherapy devices was started

30.09.2019

As part of the PTB coordinated EMPIR project PRISM-eBT, Primary standards and traceable measurement methods for X-ray electronic brachytherapy devices, a primary standard based on an extrapolation chamber is being developed. Initial simulations were carried out to determine the optimal materials, then the primary standard is being constructed and subsequently built.

A primary standard for the absorbed dose to water is being developed. In addition, new radiation qualities from miniature X-ray tubes will be introduced that can be adopted by national metrology institutes (NMIs) in other countries at no high cost to build a calibration service in each country. In this way, the absorbed dose to water at a depth of 1 cm, which is relevant for tumor irradiation in brachytherapy, can be dissiminated in Europe and worldwide, which, in particular, improves tumor therapy but also the comparability of clinical studies. (Opens external link in new windowmore information)