RECEIVING RADIOACTIVE PACKAGES Flashcards
Radioactive packages should be delivered
directly to ____ LABORATORY to avoid
unnecessary exposure to patients and staffs.
HOT
Once a radioactive package has been received,
it must be monitored for contamination within __hours from delivery time.
3
During inspection:
• Look for ___of or ____
signs, leakage
Using GM counter in mR/hr unit
___is performed at the surface of the package and at __meter from the package
External survey
1
Swabbing around the surface with cotton ball and measure the possible activity in the well counter.
Wipe test
Exposure limit of surface survey
<200 mR/hr
Exposure limit of activity @ 1m
<10 mR/hr
Exposure limit of wipe test
6600 dpm/300 cm2
5 Routes of administration
Intravenous: Veins
• Intrathecal: Spinal canal
• Intraarterial: Artery
• Oral
• Inhalation
2 Production of Radionuclides
Generator systems
Molybdenum 99/Tecnicium 99m
Generator
The generator can be eluted or “milked” more than once
per day after elution.
50% -__hours
75% - __ hours
100% - __ hours.
4
8.5
23
The 66 hours half-life of Mo-99 allows generators to be
used for __weeks.
2
To wash out or extract
Elute
The only desired radionuclide in the
Mo-99/Tc-99m generator.
Technicium-99m
Any other radionuclide in the sample is
considered a___ and
undesirable because it will result in
additional radiation exposure to the
patient without clinical benefit
radionuclide impurity
