LMRT STATE REVIEW STUDY GUIDE 2026
COMPREHENSIVE QUESTION–ANSWER
DIGEST
◉ 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 dosage?
A.) Decrease kVp by 30%
B.) Decrease kVp by 15%
C.) Increase kVp by 15%
D.) Increase kVp by 30%
Answer: Increase kVp by 30%
◉ 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.
Answer: Faster speed IR system
,◉ 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
Answer: Reduce the likelihood of genetic changes
◉ 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
Answer: 2 and 3 only
◉ 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
Answer: when the gonads are within 5 cm of the radiation field
◉ 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 exposure
D.) equipment malfunction
Answer: Repeat exposure
◉ 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
Answer: Clearly instructing patients
◉ 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
Answer: It limits the radiation field to the area of interest
◉ 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
Answer: Collimator
◉ 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
Answer: Removes longer wavelength photons
◉ 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)
COMPREHENSIVE QUESTION–ANSWER
DIGEST
◉ 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 dosage?
A.) Decrease kVp by 30%
B.) Decrease kVp by 15%
C.) Increase kVp by 15%
D.) Increase kVp by 30%
Answer: Increase kVp by 30%
◉ 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.
Answer: Faster speed IR system
,◉ 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
Answer: Reduce the likelihood of genetic changes
◉ 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
Answer: 2 and 3 only
◉ 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
Answer: when the gonads are within 5 cm of the radiation field
◉ 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 exposure
D.) equipment malfunction
Answer: Repeat exposure
◉ 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
Answer: Clearly instructing patients
◉ 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
Answer: It limits the radiation field to the area of interest
◉ 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
Answer: Collimator
◉ 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
Answer: Removes longer wavelength photons
◉ 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)
