Assessment of radionuclide impurities in [F]fluoromethylcholine ([F]FMCH).

Purpose: [F]Fluoromethylcholine ([F]FMCH) is a radiopharmaceutical used in positron emission tomography (PET) imaging for the study of prostate, breast, and brain tumors. It is usually synthesized in cyclotron facilities where F is produced by proton irradiation of [O]HO through O(p,n)F reaction. Due to the activation of target materials, the bombardment causes unwanted radionuclidic impurities in [O]HO, that need to be removed during the radiopharmaceutical synthesis.

Natural radionuclides measurements and total dose indicative evaluation in drinking waters of an Italian central region.

A study of radioactivity content in drinking waters collected in some areas of geological interest in an Italian central region was performed to check the compliance with recent European regulations. Gross alpha and beta activities, 226Ra, 238U, 234U, 210Po and 3H concentrations were measured. Gross alpha and beta, 226Ra and 3H activities were determined using an ultra-low-level scintillation counter, 238U, 234U and 210Po by alpha spectrometry after radiochemical separation.

Radioactivity measurements and radiation dose evaluation in tap waters of Central Italy.

Consumption of drinking water is very important for human nutrition and its quality must be strictly controlled. A study of radioactivity content in tap water samples collected in the Central Italy was performed in order to check the compliance with recent European regulations. Gross alpha and beta activity, 226Ra, 238U and 234U concentrations were measured.