Methods and devices for measuring the activity of a radioisotope
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United States of America Patent
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Dec 19, 2006
Grant Date -
Feb 10, 2005
app pub date -
Dec 5, 2002
filing date -
Dec 6, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of measuring the activity of a radioisotope (3) placed in an ionisation chamber (1) consists in:--determining the energy spectrum of the radiation emitted by the radioisotope;--automatically comparing the energy spectrum with a set of pre-recorded or pre-programmed radioisotope energy spectra in such a way as to identify the radioisotope present;--subsequently, automatically directing the calibration coefficient corresponding to the radioisotope present to the electronic measuring elements in order to obtain the appropriate activity measurement. The invention provides a totally automatic activity measurement. Moreover, the invention also relates to an activity meter with radioisotope recognition which is used to obtain an automatic activity measurement. The device employs one or more scintillation--or semi-conductor-type radiation detectors (10) for determining the energy spectrum of the radioisotope present.
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