LMRT STATE REVIEW EXAM
Questions and Answers
1.Which of the following statements are correct regarding the link
between radiation dose and genetic effects?
1. The link has 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
ANS 2 and 3 only
2.Which of the following changes in kilovoltage (KVP) will result in the
great- est reduction of patient dose, when milliamperage-seconds (mAs) is
adjusted to compensate for the dosage?
A.) Decrease kVp by 30%
B.) Decrease kVp by 15%
C.) Increase kVp by 15%
D.) Increase kVp by 30%
ANS Increase kVp by 30%
3.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 affect the patient dose.-
ANS Faster speed IR system
4.What is the primary purpose of using gonad shields during radiography?
A.) Reduce the likelihood of genetic changes
B.) Reduce likelihood of somatic effects
C.) Protect patient modesty
D.) Demonstrate the location of the gonads in the image
ANS Reduce the likelihood of genetic changes
5.Which one of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow
A.) 1 and 2 only
B.) 1 and 3 only
C.) 2 and 3 only
D.) 1, 2, and 3
ANS 2 and 3 only
6.When should gonad shielding be used?
A.) for all patients
B.) For all procedures
C.) when the gonads are within 10 cm of the radiation field
,D.) when the gonads are within 5 cm of the radiation field
ANS when the gonads are within 5 cm of the radiation field
7.The greatest cause of unnecessary radiation to patients that can be con-
trolled by the limited operator is
A.) Patient condition
B.) Patient size
C.) Repeat exposure
D.) equipment malfunction
ANS Repeat exposure
8.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
ANS Clearly instructing patients
9.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 effect of patient motion
D.) It limits repeat exposure
ANS It limits the radiation field to the area of interest
, 10.What is the device that allows the limited operator to vary the size of
the radiation field?
A.) Collimator
B.) Detent
C.) Filter
D.) Sheild
ANS Collimator
11.How does filtration reduce patient exposure?
A.) Removes the shorter-wavelength photons
B.) Removes longer wavelength photons
C.) Reduces the size of the radiation field
D.) Reduces the time of exposure
ANS Removes longer wavelength photons
12.What is the National Council on Radiation Protection and
Measurements (NCRP) recommendation for the amount of total filtration?
A.) 0.5mm aluminum equivalent ( AL Equiv)
B.) 1.5mm AL Equiv
C.) 2.5mm Al Equiv
D.) 3.5mm Al Equiv
ANS 2.5mm Al Equiv
13.What are the three principal methods used to protect limited
operators from unnecessary radiation exposure?
Questions and Answers
1.Which of the following statements are correct regarding the link
between radiation dose and genetic effects?
1. The link has 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
ANS 2 and 3 only
2.Which of the following changes in kilovoltage (KVP) will result in the
great- est reduction of patient dose, when milliamperage-seconds (mAs) is
adjusted to compensate for the dosage?
A.) Decrease kVp by 30%
B.) Decrease kVp by 15%
C.) Increase kVp by 15%
D.) Increase kVp by 30%
ANS Increase kVp by 30%
3.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 affect the patient dose.-
ANS Faster speed IR system
4.What is the primary purpose of using gonad shields during radiography?
A.) Reduce the likelihood of genetic changes
B.) Reduce likelihood of somatic effects
C.) Protect patient modesty
D.) Demonstrate the location of the gonads in the image
ANS Reduce the likelihood of genetic changes
5.Which one of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow
A.) 1 and 2 only
B.) 1 and 3 only
C.) 2 and 3 only
D.) 1, 2, and 3
ANS 2 and 3 only
6.When should gonad shielding be used?
A.) for all patients
B.) For all procedures
C.) when the gonads are within 10 cm of the radiation field
,D.) when the gonads are within 5 cm of the radiation field
ANS when the gonads are within 5 cm of the radiation field
7.The greatest cause of unnecessary radiation to patients that can be con-
trolled by the limited operator is
A.) Patient condition
B.) Patient size
C.) Repeat exposure
D.) equipment malfunction
ANS Repeat exposure
8.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
ANS Clearly instructing patients
9.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 effect of patient motion
D.) It limits repeat exposure
ANS It limits the radiation field to the area of interest
, 10.What is the device that allows the limited operator to vary the size of
the radiation field?
A.) Collimator
B.) Detent
C.) Filter
D.) Sheild
ANS Collimator
11.How does filtration reduce patient exposure?
A.) Removes the shorter-wavelength photons
B.) Removes longer wavelength photons
C.) Reduces the size of the radiation field
D.) Reduces the time of exposure
ANS Removes longer wavelength photons
12.What is the National Council on Radiation Protection and
Measurements (NCRP) recommendation for the amount of total filtration?
A.) 0.5mm aluminum equivalent ( AL Equiv)
B.) 1.5mm AL Equiv
C.) 2.5mm Al Equiv
D.) 3.5mm Al Equiv
ANS 2.5mm Al Equiv
13.What are the three principal methods used to protect limited
operators from unnecessary radiation exposure?
