What does DOT stand for?
CORRECT ANSWER
(Department of Transportation)
determines labeling and packaging requirements. There are some important directions and specific
labeling when packaging radioactive materials as well as special receipt procedures.
film badge
CORRECT ANSWER
Detector that is a piece of radiation sensitive film that is housed in a light and vapor proof envelope.
Pocket Dosimeter
CORRECT ANSWER
a. Direct Read Pocket Dosimeter
Size and shape of a pen that contains a small ionization chamber
By pointing the instrument at a light source, the exposure reading is viewed on a translucent scale which
is shown in units of exposure.
b. Digital Electronic Dosimeter
Provides an immediate exposure readout (can be read while worn)
The electronic counter inside the dosimeter displays the accumulated exposure and dose rate in digital
form.
Thermo Luminescence Dosimeter (TLD) (Ring badge)
,CORRECT ANSWER
• Also known as a ring badge
• Contains lithium fluoride crystals as sensing material. When ionizing radiation enters the dosimeter, it
generates free electrons and holes pair that can be trapped inside the crystal material.
Optically Stimulated Luminescence (OSL) Dosimeter
CORRECT ANSWER
• Similar to TLD ring badges, however, these badges contain aluminum oxide crystals. When it is time to
assess the dose, the trapped electrons are freed by exposing the dosimeter to a laser or LED light.
DOSE CALIBRATOR QC - CONSTANCY
CORRECT ANSWER
• Performed DAILY, upon installation, after repair or if the dose calibrator is relocated.
• Used to verify the dose calibrator is measuring radioactivity precisely.
• usually Cs-137
DOSE CALIBRATOR QC - LINEARITY
CORRECT ANSWER
Performed Quarterly (every 3 months), upon installation, after repair or if the dose calibrator is
relocated.
• Checks if the calibrator is able to accurately measure the correct activity over the entire range of use.
• Test is done by using a vial or syringe of Tc-99m
DOSE CALIBRATOR QC - ACCURACY
CORRECT ANSWER
• Performed ANNUALLY, upon installation, after repair or if the dose calibrator is relocated.
, • Assesses the ability of a dose calibrator to provide a true measurement of isotope frequently used.
• A total of 3 (or more) consecutive measurements of the reference source are taken.
Certification
CORRECT ANSWER
ARRT:
NMTCB:
a process by which a nongovernmental organization grants recognition to an individual who has met
predetermine qualifications.
What are the 3 advisory groups?
CORRECT ANSWER
International Commission on Radiological Protection (ICRP)
International Commission on Radiation Units & Measurements (ICRU)
National Council on Radiation Protection (NCRP)
Gas Ionization Curve
CORRECT ANSWER
In order from lowest to highest
1. Recombination Region
2. Ionization Region
3. Proportional Region
4. Limited Proportional Region
5. Geiger-Mueller Region
6. Self (Continuous) Discharge Region
CORRECT ANSWER
(Department of Transportation)
determines labeling and packaging requirements. There are some important directions and specific
labeling when packaging radioactive materials as well as special receipt procedures.
film badge
CORRECT ANSWER
Detector that is a piece of radiation sensitive film that is housed in a light and vapor proof envelope.
Pocket Dosimeter
CORRECT ANSWER
a. Direct Read Pocket Dosimeter
Size and shape of a pen that contains a small ionization chamber
By pointing the instrument at a light source, the exposure reading is viewed on a translucent scale which
is shown in units of exposure.
b. Digital Electronic Dosimeter
Provides an immediate exposure readout (can be read while worn)
The electronic counter inside the dosimeter displays the accumulated exposure and dose rate in digital
form.
Thermo Luminescence Dosimeter (TLD) (Ring badge)
,CORRECT ANSWER
• Also known as a ring badge
• Contains lithium fluoride crystals as sensing material. When ionizing radiation enters the dosimeter, it
generates free electrons and holes pair that can be trapped inside the crystal material.
Optically Stimulated Luminescence (OSL) Dosimeter
CORRECT ANSWER
• Similar to TLD ring badges, however, these badges contain aluminum oxide crystals. When it is time to
assess the dose, the trapped electrons are freed by exposing the dosimeter to a laser or LED light.
DOSE CALIBRATOR QC - CONSTANCY
CORRECT ANSWER
• Performed DAILY, upon installation, after repair or if the dose calibrator is relocated.
• Used to verify the dose calibrator is measuring radioactivity precisely.
• usually Cs-137
DOSE CALIBRATOR QC - LINEARITY
CORRECT ANSWER
Performed Quarterly (every 3 months), upon installation, after repair or if the dose calibrator is
relocated.
• Checks if the calibrator is able to accurately measure the correct activity over the entire range of use.
• Test is done by using a vial or syringe of Tc-99m
DOSE CALIBRATOR QC - ACCURACY
CORRECT ANSWER
• Performed ANNUALLY, upon installation, after repair or if the dose calibrator is relocated.
, • Assesses the ability of a dose calibrator to provide a true measurement of isotope frequently used.
• A total of 3 (or more) consecutive measurements of the reference source are taken.
Certification
CORRECT ANSWER
ARRT:
NMTCB:
a process by which a nongovernmental organization grants recognition to an individual who has met
predetermine qualifications.
What are the 3 advisory groups?
CORRECT ANSWER
International Commission on Radiological Protection (ICRP)
International Commission on Radiation Units & Measurements (ICRU)
National Council on Radiation Protection (NCRP)
Gas Ionization Curve
CORRECT ANSWER
In order from lowest to highest
1. Recombination Region
2. Ionization Region
3. Proportional Region
4. Limited Proportional Region
5. Geiger-Mueller Region
6. Self (Continuous) Discharge Region
