RAD 105 COMPREHENSIVE EXAM 2025 QUESTIONS AND
ANSWERS RATED A+
flight or fight response - ✔✔Biological reaction to alarming stressors that musters the
body's resources (for example, blood flow and respiration) to resist or flee a threat.
identify the problem
investigate the problem
formulate possible solutions
select and enact the best solution - ✔✔steps to critical thinking
diagnostic yield - ✔✔The amount of clinically useful information on a diagnostic image
Diagnostic Efficacy - ✔✔The accuracy of diagnostic information on a medical image
negative - ✔✔charge of the cathode
positive - ✔✔charge of the anode
generator control - ✔✔interface between the radiographer and the electronics of the x
ray machine
Automatic Exposure Control, sensors on chest unit - ✔✔what does AEC stand for? what
is it?
peak kilovoltage - ✔✔kVp
Miliampere Seconds - ✔✔mA
film screen
computed radiography(CR) & IR (PSP) must also have a reader - ✔✔cassette based
systems
Digital radiography systems (DR) - ✔✔flat panel technology, use thin film transistors
DR indirect - ✔✔amorphous silicon
DR direct - ✔✔amorphous selenium
that absorbed in the detector and able to be converted into a radiographic image for
interpretation - ✔✔the only radiation that is of clinical value
Flouroscopy - ✔✔Can view the anatomy in real time using a computer screen, tube is
under the patient
, mobile flouroscopy - ✔✔uses C arm
As Low As Reasonably Achievable - ✔✔ALARA
3 things necessary to create an x ray - ✔✔1. source of electrons (cathode end of tube)
2. a force to move electrons rapidly (kVp)
3. something to stop the movement of electrons quickly= deceleration (anode)
true - ✔✔the x ray beam is heterogeneous which means that many x ray photons vary
in intensity. (T/F)
thompson and classic scattering - ✔✔Classic coherent scattering is also called
compton - ✔✔This type of interaction is within the diagnostic ranges of x-ray, and
accounts for most of radiation workers' exposure
gray - ✔✔A rad, in International System units, is the
Rad - ✔✔A rem is equal to a ____ multiplied by a Quality Factor
Roentgen - ✔✔This unit of measurement is not used to express radiation in people, but
radiation exposure in air.
50mSv or 5rem - ✔✔annual whole body effective dose limit for an occupational worker
is
Law of bergonie and tribondeau - ✔✔-Cells are more radiosensitive during active
division and when they are primitive in structure and function.
-Cells are more radioresistant if they are more specialized in structure and function and
do not undergo repeated mitosis.
time, distance, shielding - ✔✔cardinal rules of radiation protection
absorbtion, transfer than scatter, transmission - ✔✔3 things that can happen to an x ray
beam
die, repair, divide in damaged state - ✔✔3 responses of cells to radiation
early effects of radiation - ✔✔1. bone marrow syndrome (infection, hemmorrhage
anemia)
2. gastrointestinal syndrome (NVD)
3. central nervous system syndrome (seizures, coma, eventual death)
ANSWERS RATED A+
flight or fight response - ✔✔Biological reaction to alarming stressors that musters the
body's resources (for example, blood flow and respiration) to resist or flee a threat.
identify the problem
investigate the problem
formulate possible solutions
select and enact the best solution - ✔✔steps to critical thinking
diagnostic yield - ✔✔The amount of clinically useful information on a diagnostic image
Diagnostic Efficacy - ✔✔The accuracy of diagnostic information on a medical image
negative - ✔✔charge of the cathode
positive - ✔✔charge of the anode
generator control - ✔✔interface between the radiographer and the electronics of the x
ray machine
Automatic Exposure Control, sensors on chest unit - ✔✔what does AEC stand for? what
is it?
peak kilovoltage - ✔✔kVp
Miliampere Seconds - ✔✔mA
film screen
computed radiography(CR) & IR (PSP) must also have a reader - ✔✔cassette based
systems
Digital radiography systems (DR) - ✔✔flat panel technology, use thin film transistors
DR indirect - ✔✔amorphous silicon
DR direct - ✔✔amorphous selenium
that absorbed in the detector and able to be converted into a radiographic image for
interpretation - ✔✔the only radiation that is of clinical value
Flouroscopy - ✔✔Can view the anatomy in real time using a computer screen, tube is
under the patient
, mobile flouroscopy - ✔✔uses C arm
As Low As Reasonably Achievable - ✔✔ALARA
3 things necessary to create an x ray - ✔✔1. source of electrons (cathode end of tube)
2. a force to move electrons rapidly (kVp)
3. something to stop the movement of electrons quickly= deceleration (anode)
true - ✔✔the x ray beam is heterogeneous which means that many x ray photons vary
in intensity. (T/F)
thompson and classic scattering - ✔✔Classic coherent scattering is also called
compton - ✔✔This type of interaction is within the diagnostic ranges of x-ray, and
accounts for most of radiation workers' exposure
gray - ✔✔A rad, in International System units, is the
Rad - ✔✔A rem is equal to a ____ multiplied by a Quality Factor
Roentgen - ✔✔This unit of measurement is not used to express radiation in people, but
radiation exposure in air.
50mSv or 5rem - ✔✔annual whole body effective dose limit for an occupational worker
is
Law of bergonie and tribondeau - ✔✔-Cells are more radiosensitive during active
division and when they are primitive in structure and function.
-Cells are more radioresistant if they are more specialized in structure and function and
do not undergo repeated mitosis.
time, distance, shielding - ✔✔cardinal rules of radiation protection
absorbtion, transfer than scatter, transmission - ✔✔3 things that can happen to an x ray
beam
die, repair, divide in damaged state - ✔✔3 responses of cells to radiation
early effects of radiation - ✔✔1. bone marrow syndrome (infection, hemmorrhage
anemia)
2. gastrointestinal syndrome (NVD)
3. central nervous system syndrome (seizures, coma, eventual death)
