RADT 1010 MAIN EXAMINATION TEST QUESTIONS AND
ANSWERS GRADED A+
✔✔Define mission statement - ✔✔A general declaration of the purpose of the
organization and the very long term objective that its leader wants to achieve.
✔✔define organizational chart - ✔✔The visual representation of an organization's
structure
✔✔define medical staff - ✔✔Physicians who may be either employees of the
organization or independent practitioners.
They must be granted privileges to see patients at the institution.
✔✔define rem - ✔✔rapid eye movement
✔✔Define Roentgen - ✔✔measure of radiation exposure or x-ray machine output
✔✔define sievert - ✔✔unit of ionizing radiation absorbed dose equivalent to 100 Rems
✔✔Define attenuation - ✔✔The reduction in the number of x-ray photons in the beam,
and subsequent loss of energy, as the beam passes through matter.
✔✔Define contrast - ✔✔differences in intensity between two objects or between an
object and its background
we use contrast with high atomic numbers to enhance the body's natural low atomic
state
✔✔Define latent image - ✔✔invisible image on a radiographic film before processing
✔✔define scattered radiation - ✔✔All the radiation that arises from the interaction of an
x-ray beam with the atoms of a patient or any other object in the path of the beam.
✔✔Define thermionic emission - ✔✔Heating of the filament so the outer shell electrons
are boiled off and ejected
✔✔Define radiopaque - ✔✔shows up white on x-ray
example barium (positive contrast agent)
✔✔Define diagnostic efficacy - ✔✔The degree to which the diagnostic study accurately
reveals the presence or absence of disease in the patient
✔✔define rad - ✔✔unit of absorbed dose of ionizing radiation
, ✔✔Define gray - ✔✔unit of absorbed dose
✔✔Define ALARA - ✔✔As Low As Reasonably Achievable
✔✔Define density - ✔✔Mass per unit volume
✔✔define manifest image - ✔✔The image on the film that you can see after it was
developed.
✔✔define primary radiation - ✔✔The radiation that leaves the anode and hasn't struck
the patient
✔✔define remnant radiation - ✔✔Radiation exiting the patient after an x-ray exposure
✔✔Define radiolucent - ✔✔shows up black
example air or gas (negative contrast agent)
✔✔define tether - ✔✔cord
✔✔define diagnostic yield - ✔✔The amount of clinically useful information on a
diagnostic image
✔✔list all the parts of the x-rat tube and their purpose - ✔✔glass envelope-a glass
vacuum tube that contains the anode and cathode of the x-ray tube
cathode- Negatively charged electrode
anode- Positive electrode
protective housing-Controls leakage and scatter radiation, isolates the high voltages,
provides a means to cool the tube
✔✔what are the four requirements that must exist for the production of x-rays? - ✔✔1.
source of electrons
2. a means to provide the electrons with high kinetic energy
3. a method to concentrate the electrons into a beam
4. a suitable material to rapidly decelerate the electrons
✔✔what is the relationship between distance and radiation exposure - ✔✔The further
you are the less exposure you have.
The closer you are the more exposure you have.
✔✔what is the relationship between time and radiation exposure? - ✔✔The longer
exposure time the more radiation dose.
The shorter exposure time the less radiation dose.
✔✔what imaging technologies that have replaced x-ray film - ✔✔digital x-ray
ANSWERS GRADED A+
✔✔Define mission statement - ✔✔A general declaration of the purpose of the
organization and the very long term objective that its leader wants to achieve.
✔✔define organizational chart - ✔✔The visual representation of an organization's
structure
✔✔define medical staff - ✔✔Physicians who may be either employees of the
organization or independent practitioners.
They must be granted privileges to see patients at the institution.
✔✔define rem - ✔✔rapid eye movement
✔✔Define Roentgen - ✔✔measure of radiation exposure or x-ray machine output
✔✔define sievert - ✔✔unit of ionizing radiation absorbed dose equivalent to 100 Rems
✔✔Define attenuation - ✔✔The reduction in the number of x-ray photons in the beam,
and subsequent loss of energy, as the beam passes through matter.
✔✔Define contrast - ✔✔differences in intensity between two objects or between an
object and its background
we use contrast with high atomic numbers to enhance the body's natural low atomic
state
✔✔Define latent image - ✔✔invisible image on a radiographic film before processing
✔✔define scattered radiation - ✔✔All the radiation that arises from the interaction of an
x-ray beam with the atoms of a patient or any other object in the path of the beam.
✔✔Define thermionic emission - ✔✔Heating of the filament so the outer shell electrons
are boiled off and ejected
✔✔Define radiopaque - ✔✔shows up white on x-ray
example barium (positive contrast agent)
✔✔Define diagnostic efficacy - ✔✔The degree to which the diagnostic study accurately
reveals the presence or absence of disease in the patient
✔✔define rad - ✔✔unit of absorbed dose of ionizing radiation
, ✔✔Define gray - ✔✔unit of absorbed dose
✔✔Define ALARA - ✔✔As Low As Reasonably Achievable
✔✔Define density - ✔✔Mass per unit volume
✔✔define manifest image - ✔✔The image on the film that you can see after it was
developed.
✔✔define primary radiation - ✔✔The radiation that leaves the anode and hasn't struck
the patient
✔✔define remnant radiation - ✔✔Radiation exiting the patient after an x-ray exposure
✔✔Define radiolucent - ✔✔shows up black
example air or gas (negative contrast agent)
✔✔define tether - ✔✔cord
✔✔define diagnostic yield - ✔✔The amount of clinically useful information on a
diagnostic image
✔✔list all the parts of the x-rat tube and their purpose - ✔✔glass envelope-a glass
vacuum tube that contains the anode and cathode of the x-ray tube
cathode- Negatively charged electrode
anode- Positive electrode
protective housing-Controls leakage and scatter radiation, isolates the high voltages,
provides a means to cool the tube
✔✔what are the four requirements that must exist for the production of x-rays? - ✔✔1.
source of electrons
2. a means to provide the electrons with high kinetic energy
3. a method to concentrate the electrons into a beam
4. a suitable material to rapidly decelerate the electrons
✔✔what is the relationship between distance and radiation exposure - ✔✔The further
you are the less exposure you have.
The closer you are the more exposure you have.
✔✔what is the relationship between time and radiation exposure? - ✔✔The longer
exposure time the more radiation dose.
The shorter exposure time the less radiation dose.
✔✔what imaging technologies that have replaced x-ray film - ✔✔digital x-ray
