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Measurement of Rn-219 with Alphaguard radon monitors
Carsten Wanke1, Bastian Szermerski1, Lilli Geworski1
1Medizinische Hochschule Hannover, Stabsstelle Strahlenschutz und Abteilung Medizinische Physik - OE 0020, Carl-Neuberg-Str. 1, D-30625, Hannover, Germany.
Abstract:
The alpha-emitting radionuclide Ra-223 is used in nuclear medicine in form of the commercially available radiopharmaceutical "Xofigo". The direct progeny of Ra-223 is Rn-219, a noble gas with a half-life of approx. four seconds, that might be exhaled by patients treated with Ra-223. For assessing the exhalation of Rn-219, a radon monitor calibrated for this isotope is necessary. This work investigates on the response of the commercially available Alphaguard radon monitor to Rn-219 and proposes for the first time a factor for the calculation of the Rn-219-concentration in the instrument's measurement chamber from the instrument reading suitable for estimating patients exhalations.
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