Patent ID: 7151267

Claim:
A method for measuring the activity of a radio-isotope, comprising the steps of: placing said radio-isotope ( 3 ) in an ionization chamber ( 1 ) capable of providing a current proportional to the activity of said radio-isotope tested, and then, using electronic means for processing the signal ( 15 ), in converting the value of the current into an activity value, by using a calibration coefficient corresponding to the radio-isotope at hand, by the steps of 1) determining the energy spectrum of the radiation emitted by the radioisotope ( 3 ) placed in the ionisation chamber ( 1 ), 2) comparing automatically the determined energy spectrum with a set of energy spectra of pre-recorded or pre-programmed radio-isotopes, in order to identify the radio-isotope at hand, then 3) allocating automatically to the electronic means for processing the signal ( 15 ), the calibration coefficient corresponding to said radio-isotope at hand, to obtain the adequate activity measurement.