RTE 1000 Final Exam Questions and
Answers
Attentuation - Correct Answers -The process by which a beam of x-ray photons is
altered as it passes through matter
Remnant Radiation - Correct Answers -All radiation exiting the patient during exposure
and ultimately striking the receptor
List 4 Requirements that are needed for an X-ray production - Correct Answers -1.
Vacuum 2. Source of Electrons 3. Target for electrons 4. High Voltage
The component of x ray tube that controls the size and shape of the x ray exposure field
is the is the - Correct Answers -Collimator
ALARA - Correct Answers -As Low As Reasonably Achievable
How does the use of grids affect the contrast in radiograph? - Correct Answers -The use
of grids increase contrast
Grids - Correct Answers -lead strips that absorb 90% scatter radiation (you would need
to increase technique because part of the useful beams get absorbed)
Radiolucent - Correct Answers -materials allow x-ray photons to pass through easily
(low radiation)
Radiopaque - Correct Answers -materials that do not permit the passage of x-rays (high
radiation)
Kilovoltage peak (kVp) - Correct Answers -Highest voltage of x-ray tube used during an
exposure
*CONTROLS QUALITY*
*CONTROLS ENERGY OF THE BEAM*
*CONTROLS CONTRAST*
What happens when kVp is high? - Correct Answers -Scatter=increases
Contrast-decreases
, Source-to-image receptor distance (SID) - Correct Answers -x-rays diverge or spread as
they exit the tube
-closer or farther from a source you either
decrease or increase
the interaction of x-rays with matter than constitutes the greatest hazard to patients in
diagnostic radiography is - Correct Answers -Photoelectric Effect
the unit used to measure the amount of energy absorbed in any medium is - Correct
Answers -Radiation Absorbed Dose (RAD)
-SI unit= gray
The characteristics that determine the sensitivity of a cell to radiation are: - Correct
Answers --Age (younger cells)
-Differentiation (less)
-High Metabolic Rate (more energy)
-High Mitotic Rate (rapidly dividing)
Fluoroscopy - Correct Answers -Real time images
upper/lower GI
kilovoltage determines the __________ of radiation exposure where milliampere
controls its _____________ - Correct Answers -quality; quantity
kilovoltage determines _______________ of radiographic image where milliampere
controls its ________________ - Correct Answers -contrast; density
what are the cardinal principles of radiation protection - Correct Answers -Time,
distance and shielding
As the kVp increases the scatter ________________ - Correct Answers -increases
As the kVp decreases, the contrast ______________ - Correct Answers -increases
C-Arm - Correct Answers -a portable radiography and fluoroscopy
-images patients outside of the department
-operates on battery or plug
T/F Ionization can have biologic effects - Correct Answers -TRUE
ionizing radiation comes from two major sources. What are they? - Correct Answers -1.
Natural background radiation
Answers
Attentuation - Correct Answers -The process by which a beam of x-ray photons is
altered as it passes through matter
Remnant Radiation - Correct Answers -All radiation exiting the patient during exposure
and ultimately striking the receptor
List 4 Requirements that are needed for an X-ray production - Correct Answers -1.
Vacuum 2. Source of Electrons 3. Target for electrons 4. High Voltage
The component of x ray tube that controls the size and shape of the x ray exposure field
is the is the - Correct Answers -Collimator
ALARA - Correct Answers -As Low As Reasonably Achievable
How does the use of grids affect the contrast in radiograph? - Correct Answers -The use
of grids increase contrast
Grids - Correct Answers -lead strips that absorb 90% scatter radiation (you would need
to increase technique because part of the useful beams get absorbed)
Radiolucent - Correct Answers -materials allow x-ray photons to pass through easily
(low radiation)
Radiopaque - Correct Answers -materials that do not permit the passage of x-rays (high
radiation)
Kilovoltage peak (kVp) - Correct Answers -Highest voltage of x-ray tube used during an
exposure
*CONTROLS QUALITY*
*CONTROLS ENERGY OF THE BEAM*
*CONTROLS CONTRAST*
What happens when kVp is high? - Correct Answers -Scatter=increases
Contrast-decreases
, Source-to-image receptor distance (SID) - Correct Answers -x-rays diverge or spread as
they exit the tube
-closer or farther from a source you either
decrease or increase
the interaction of x-rays with matter than constitutes the greatest hazard to patients in
diagnostic radiography is - Correct Answers -Photoelectric Effect
the unit used to measure the amount of energy absorbed in any medium is - Correct
Answers -Radiation Absorbed Dose (RAD)
-SI unit= gray
The characteristics that determine the sensitivity of a cell to radiation are: - Correct
Answers --Age (younger cells)
-Differentiation (less)
-High Metabolic Rate (more energy)
-High Mitotic Rate (rapidly dividing)
Fluoroscopy - Correct Answers -Real time images
upper/lower GI
kilovoltage determines the __________ of radiation exposure where milliampere
controls its _____________ - Correct Answers -quality; quantity
kilovoltage determines _______________ of radiographic image where milliampere
controls its ________________ - Correct Answers -contrast; density
what are the cardinal principles of radiation protection - Correct Answers -Time,
distance and shielding
As the kVp increases the scatter ________________ - Correct Answers -increases
As the kVp decreases, the contrast ______________ - Correct Answers -increases
C-Arm - Correct Answers -a portable radiography and fluoroscopy
-images patients outside of the department
-operates on battery or plug
T/F Ionization can have biologic effects - Correct Answers -TRUE
ionizing radiation comes from two major sources. What are they? - Correct Answers -1.
Natural background radiation
