LMRT A+ Exam Prep Q&As 2024
2 and 3 only - ANS-Which of the following statements are correct regarding the link
between radiation dose and genetic effects
1. The link has a been demonstrated in human studies
2. The link has been demonstrated in animal studies
3. Increased risk to humans cannot be predicted with respect to an individual
Increase kVp by 30% - ANS-Which of the following changes in kilovoltage (kVp) will
result in the greatest reduction of patient dose, when milliamperage-seconds (mAs) is
adjusted to compensate for the change?
a. decrease kVp by 30%
b. decrease kVp by 15%
c. increase kVp by 15%
d. increase kVp by 30%
Faster speed IR system - ANS-Which of the following image receptor (IR) system
speeds will result in the lowest patient dose?
a. slower speed IR system
b. faster speed IR system
c. it does not matter; the IR system speed does not effect the patient dose.
Reduce the likelihood of genetic effects - ANS-What is the primary purpose of using
gonad shielding during radiography?
a. reduce the likelihood of genetic effects
b. reduce the likelihood of somatic effects
c. protect patient modesty
d. demonstrate the location of gonads in the image
2 and 3 only - ANS-Which of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow
,When the gonads are within 5 cm of the radiation field - ANS-When should gonad
shields be used?
a. for all patients
b. for all procedures
c. when gonads are within 10 cm of the radiation field
d. when the gonads are within 5 cm of the radiation field
repeat exposures - ANS-The greatest cause of unnecessary radiation to patients that
can be controlled by the limited operator is:
a. patient condition
b. patient size
c. repeat exposures
d. equipment malfunction
clearly instructing patients - ANS-The limited operator can reduce repeat exposures by :
a. accepting marginal images
b. clearly instructing patients
c. increasing the source-image receptor distance (SID)
d. optimizing the kVP
it limits the radiation field to the area of interest - ANS-How does x-ray beam restriction
minimize patient exposure?
a. it limits radiation fog
b. it limits the radiation field to the area of interest
c. it limits the effects of patient
d. it limits repeat exposures
Collimator - ANS-What is the device that allows the limited operator to vary size of the
radiation field?
a. collimator
b. detent
c. filter
d. shield
Removes longer-wavelength photons - ANS-How does filtration reduce patient
, exposure?
a. removes shorter wavelength photons
b. removes longer wavelength photons
c. reduces size of the radiation field
d. reduces the time of exposure
2.5 mm Al equiv - ANS-What is the National Council on Radiation Protection and
Measurements (NCRP) recommendations for the amount of total filtration?
a. 0.5 mm aluminum equivalents
b. 1.5 mm Al equiv
c. 2.5 mm Al equiv
d. 3.5 mm Al equiv
time, distance, shielding - ANS-What are the three principle methods used to protect
limited operators from unnecessary radiation exposure
a. time, distance, and shielding
b. time, distance and collimation
c. distance, collimation, and shielding
d. time, collimation, and filtration
Shadow - ANS-Which of the following is not a type of personnel radiation shielding?
a. apron
b. glove
c. thyroid shield
d. shadow
Scatter radiation from the patient - ANS-Personnel shielding must be worn on the rare
occasion during which the limited operator may need to remain in the radiographic room
during an exposure to assist patient in maintaining proper position. What is the source of
the greatest radiation hazard under this circumstance?
a. off focus radiation
b. leakage radiation
c. scatter radiation from the patient
d. backscatter radiation from the IR
2 and 3 only - ANS-Which of the following statements are correct regarding the link
between radiation dose and genetic effects
1. The link has a been demonstrated in human studies
2. The link has been demonstrated in animal studies
3. Increased risk to humans cannot be predicted with respect to an individual
Increase kVp by 30% - ANS-Which of the following changes in kilovoltage (kVp) will
result in the greatest reduction of patient dose, when milliamperage-seconds (mAs) is
adjusted to compensate for the change?
a. decrease kVp by 30%
b. decrease kVp by 15%
c. increase kVp by 15%
d. increase kVp by 30%
Faster speed IR system - ANS-Which of the following image receptor (IR) system
speeds will result in the lowest patient dose?
a. slower speed IR system
b. faster speed IR system
c. it does not matter; the IR system speed does not effect the patient dose.
Reduce the likelihood of genetic effects - ANS-What is the primary purpose of using
gonad shielding during radiography?
a. reduce the likelihood of genetic effects
b. reduce the likelihood of somatic effects
c. protect patient modesty
d. demonstrate the location of gonads in the image
2 and 3 only - ANS-Which of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow
,When the gonads are within 5 cm of the radiation field - ANS-When should gonad
shields be used?
a. for all patients
b. for all procedures
c. when gonads are within 10 cm of the radiation field
d. when the gonads are within 5 cm of the radiation field
repeat exposures - ANS-The greatest cause of unnecessary radiation to patients that
can be controlled by the limited operator is:
a. patient condition
b. patient size
c. repeat exposures
d. equipment malfunction
clearly instructing patients - ANS-The limited operator can reduce repeat exposures by :
a. accepting marginal images
b. clearly instructing patients
c. increasing the source-image receptor distance (SID)
d. optimizing the kVP
it limits the radiation field to the area of interest - ANS-How does x-ray beam restriction
minimize patient exposure?
a. it limits radiation fog
b. it limits the radiation field to the area of interest
c. it limits the effects of patient
d. it limits repeat exposures
Collimator - ANS-What is the device that allows the limited operator to vary size of the
radiation field?
a. collimator
b. detent
c. filter
d. shield
Removes longer-wavelength photons - ANS-How does filtration reduce patient
, exposure?
a. removes shorter wavelength photons
b. removes longer wavelength photons
c. reduces size of the radiation field
d. reduces the time of exposure
2.5 mm Al equiv - ANS-What is the National Council on Radiation Protection and
Measurements (NCRP) recommendations for the amount of total filtration?
a. 0.5 mm aluminum equivalents
b. 1.5 mm Al equiv
c. 2.5 mm Al equiv
d. 3.5 mm Al equiv
time, distance, shielding - ANS-What are the three principle methods used to protect
limited operators from unnecessary radiation exposure
a. time, distance, and shielding
b. time, distance and collimation
c. distance, collimation, and shielding
d. time, collimation, and filtration
Shadow - ANS-Which of the following is not a type of personnel radiation shielding?
a. apron
b. glove
c. thyroid shield
d. shadow
Scatter radiation from the patient - ANS-Personnel shielding must be worn on the rare
occasion during which the limited operator may need to remain in the radiographic room
during an exposure to assist patient in maintaining proper position. What is the source of
the greatest radiation hazard under this circumstance?
a. off focus radiation
b. leakage radiation
c. scatter radiation from the patient
d. backscatter radiation from the IR
