CAPINTEC, INC. CRC
®
-25R
FUNCTIONAL DESCRIPTION
The CRC
®
-25R provides a precise, accurate, fast and very convenient method of measuring
the activity of a radioisotope sample for Nuclear Medicine and Brachytherapy.
The activity of the sample will be displayed with a proper unit when a sample of unknown
strength (activity) of a known radioisotope is placed in the ionization chamber and the correct
calibration number is selected.
The sample must be placed in the same geometry as the reference source used to
determine the calibration number by using the appropriate source holder.
Note: For a detailed description of the basic principles of the calibrator, reference
APPENDIX I: PRINCIPLE OF THE CALIBRATOR.
Most radioisotopes can be measured in the Chamber.
Eight preset nuclide keys are provided for the most often used radioisotopes.
Five user assignable nuclide keys are provided for commonly used radioisotopes that do not
have a preset nuclide key.
Assays may be made reliably in the Chamber, from as low as 1 microcurie (0.1
megabequerel) for most radioisotopes to as high as 8 curies [200 giga (10
9
) Becquerel] of
Tc99m.
The 6cm diameter and 25cm deep ionization chamber well allows convenient measurements
of virtually any radioisotope geometry in clinical use including whole generators, syringes and
seed trains.
The external shield of the ionization chamber protects users from exposure to intensive
radiation and reduces the effects from background radiation on low-level measurements.
2 - 2 FUNCTIONAL & TECHNICAL DESCRIPTION March 15
To Next Page
Loading...
Need help?
General