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190 ATOMLAB 500 DOSE CALIBRATOR
Dial Values
The dial value is used to convert the current to the activity being measured in the chamber. The
system allows the operator to enter any dial value possible on the display into the Atomlab
program for an isotope.
Display Fluctuations
displayed value changes without the removal or insertion of a source in the chamber well.
Display Unit
The Atomlab component incorporating the electronics, control keys and displays which perform
and show activity measurements.
Dose Calibration
The verification of the activity of a radiopharmaceutical to be administered to a patient,
corresponding to the radiation to be delivered to the body.
Electrometer
Measures the current in the ionization chamber, which is proportional to the activity of a source
within the chamber.
Geometry Tests
The test of a dose calibrator to determine the variation in the displayed activity values due to the
geometric configuration of the source's container (vial, syringe, etc.) and its location within the
ionization chamber detector.
Ionization Chamber
A device which responds to the activity of a source by forming ion pairs which can be collected
as a measure of the radioactivity.
Kit
A calibrated solution containing a compound which can be labeled with a radionuclide such as Tc-
99m (radiopharmaceuticals.) From such kits, doses are prepared to administer to patients to
facilitate nuclear imaging.
L-Block Shield
A partially transparent radiation shield behind which doses can be prepared.
Linearity Tests
The test of a dose calibrator to determine the variation in the displayed activity values from the
true ones over the measurement range of the instrument.
Lineator
A sleeve shield package to perform linearity tests on dose calibrators.
Moly Breakthrough Shield
Used in the Moly Breakthrough Test to shield the radiation of the Tc-99m in an eluent so that
the activity of the Mo-99 can be measured.
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