RADT 1200 – FINAL EXAM Q’S AND A’S
The transfer of energy from one location to another - Answer- Radiation
The degree to which the diagnostic study accurately reveals the presence or
absence of disease in the patient, while adhering to radiation safety guidelines -
Answer- Diagnostic efficacy
The amount of ionization produced in air when ionizing radiation is present -
Answer- Exposure
Exposure is measured in - Answer- Coulomb per kilogram
The amount of energy that is deposited in a material per unit mass of the material -
Answer- Absorbed dose
Absorbed dose is measured in - Answer- Milligray
An attempt to provide a quantity that is a measure of general harm in humans -
Answer- Effective dose
Effective dose is measured in - Answer- Millisievert
Takes into the account the amount of absorbed dose that is received by human, the
exact type of radiation, and specific organ irradiated - Answer- Effective dose
Synonymous with the term optimization for radiation protection - Answer- ALARA
3 cardinal rules - Answer- Time, distance, shielding
BERT stands for - Answer- Background equivalent radiation time
Common purpose is to reduce the radiation dose for pediatric patients - Answer-
Alliance for radiation safety in pediatric imaging (2007)
Pediatric CT dose reduction campaign - Answer- Image gently campaign (2008)
Provides a full understanding of the safe operation of fluoro devices on pediatric
patients - Answer- Pause and pulse
Objectives of lowering the amount of radiation used in medically necessary imaging
studies and eliminating unnecessary procedures - Answer- Image wisely
campaign (2009)
, Full range of frequencies and wavelengths of electromagnetic waves - Answer-
Electromagnetic spectrum
Naturally occurring process in which unstable nuclei relieve the instability by various
types of spontaneous nuclear emissions - Answer- Radioactive decay
Contain 2 protons and 2 neutrons - Answer- Alpha particle
Much less penetrating - Answer- Alpha particle
Emitted from nuclei of very heavy elements during their radioactive decay - Answer-
Alpha particles
Emitted from within the nuclei of radioactive atoms - Answer- Beta particles
Nonionizing radiation - Answer- UV radiation with energy less than 10 eV, visible
light, infrared rays, microwaves, radiowaves
Changes in blood count is example of - Answer- Organic damage
Natural radiation - Answer- 3.1 mSv
Human made radiation - Answer- 0.1 mSv
Medical radiation - Answer- 2.3 mSv
Radioactive atoms - Answer- Radionuclides
Most significant contributor to background radiation - Answer- Radon
Ionizing radiation from planetary and extra-planetary sources - Answer- Natural
background radiation
Tungsten atomic number - Answer- 74
Rhenium atomic number - Answer- 75
Anode is usually made of - Answer- Tungsten, or alloy of tungsten and rhenium
If photons pass through patient without interacting with the atoms of patient -
Answer- Direct transmission
If photons interact with patient atoms but still strike IR - Answer- Indirect
transmission
The transfer of energy from one location to another - Answer- Radiation
The degree to which the diagnostic study accurately reveals the presence or
absence of disease in the patient, while adhering to radiation safety guidelines -
Answer- Diagnostic efficacy
The amount of ionization produced in air when ionizing radiation is present -
Answer- Exposure
Exposure is measured in - Answer- Coulomb per kilogram
The amount of energy that is deposited in a material per unit mass of the material -
Answer- Absorbed dose
Absorbed dose is measured in - Answer- Milligray
An attempt to provide a quantity that is a measure of general harm in humans -
Answer- Effective dose
Effective dose is measured in - Answer- Millisievert
Takes into the account the amount of absorbed dose that is received by human, the
exact type of radiation, and specific organ irradiated - Answer- Effective dose
Synonymous with the term optimization for radiation protection - Answer- ALARA
3 cardinal rules - Answer- Time, distance, shielding
BERT stands for - Answer- Background equivalent radiation time
Common purpose is to reduce the radiation dose for pediatric patients - Answer-
Alliance for radiation safety in pediatric imaging (2007)
Pediatric CT dose reduction campaign - Answer- Image gently campaign (2008)
Provides a full understanding of the safe operation of fluoro devices on pediatric
patients - Answer- Pause and pulse
Objectives of lowering the amount of radiation used in medically necessary imaging
studies and eliminating unnecessary procedures - Answer- Image wisely
campaign (2009)
, Full range of frequencies and wavelengths of electromagnetic waves - Answer-
Electromagnetic spectrum
Naturally occurring process in which unstable nuclei relieve the instability by various
types of spontaneous nuclear emissions - Answer- Radioactive decay
Contain 2 protons and 2 neutrons - Answer- Alpha particle
Much less penetrating - Answer- Alpha particle
Emitted from nuclei of very heavy elements during their radioactive decay - Answer-
Alpha particles
Emitted from within the nuclei of radioactive atoms - Answer- Beta particles
Nonionizing radiation - Answer- UV radiation with energy less than 10 eV, visible
light, infrared rays, microwaves, radiowaves
Changes in blood count is example of - Answer- Organic damage
Natural radiation - Answer- 3.1 mSv
Human made radiation - Answer- 0.1 mSv
Medical radiation - Answer- 2.3 mSv
Radioactive atoms - Answer- Radionuclides
Most significant contributor to background radiation - Answer- Radon
Ionizing radiation from planetary and extra-planetary sources - Answer- Natural
background radiation
Tungsten atomic number - Answer- 74
Rhenium atomic number - Answer- 75
Anode is usually made of - Answer- Tungsten, or alloy of tungsten and rhenium
If photons pass through patient without interacting with the atoms of patient -
Answer- Direct transmission
If photons interact with patient atoms but still strike IR - Answer- Indirect
transmission
