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Methods and devices for measuring the activity of a radioisotope

  • US 7,151,267 B2
  • Filed: 12/05/2002
  • Issued: 12/19/2006
  • Est. Priority Date: 12/06/2001
  • Status: Expired due to Fees
First Claim
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1. 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, andthen, 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 of1) 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, then3) 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.

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