LMRT State Exam Review 2026/2027 | Actual Questions and
Answers Latest Updated 2026/2027 (Graded A+)
•
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.
- ✔✔2 and 3 only
•
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%
- ✔✔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.
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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)
B.) 1.5mm AL Equiv
C.) 2.5mm Al Equiv
D.) 3.5mm Al Equiv
- ✔✔2.5mm Al Equiv
•
What are the three principal 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
- ✔✔Time, Distance, and Shielding
•
Which of the following is not a type of personnel radiation shielding?
A.) Apron
B.) Glove
C.) Thyroid Shield
D.) Shadow
- ✔✔Shadow
•
Personnel shielding must be worn on the rare occasion during which the limited operator may need to
remain in the radiographic room during the exposure to assist the patient in maintaining the proper
position . What is the source of the greatest radiation hazard under this circumstance?
A.) Off-focus radiation
B.) Leakage Radiation
C.) Scattered Radiation from the patient
D.) Back scatter radiation from the IR
- ✔✔Scattered Radiation from the patient
•
What is the term for radiation that escapes from the x-ray tube housing?
A.) Scatter radiation
B.) Off-focus radiation
C.) Primary Radiation
D.) Leakage Radiation
- ✔✔Leakage Radiation
Answers Latest Updated 2026/2027 (Graded A+)
•
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.
- ✔✔2 and 3 only
•
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%
- ✔✔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.
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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
- ✔✔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)
B.) 1.5mm AL Equiv
C.) 2.5mm Al Equiv
D.) 3.5mm Al Equiv
- ✔✔2.5mm Al Equiv
•
What are the three principal 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
- ✔✔Time, Distance, and Shielding
•
Which of the following is not a type of personnel radiation shielding?
A.) Apron
B.) Glove
C.) Thyroid Shield
D.) Shadow
- ✔✔Shadow
•
Personnel shielding must be worn on the rare occasion during which the limited operator may need to
remain in the radiographic room during the exposure to assist the patient in maintaining the proper
position . What is the source of the greatest radiation hazard under this circumstance?
A.) Off-focus radiation
B.) Leakage Radiation
C.) Scattered Radiation from the patient
D.) Back scatter radiation from the IR
- ✔✔Scattered Radiation from the patient
•
What is the term for radiation that escapes from the x-ray tube housing?
A.) Scatter radiation
B.) Off-focus radiation
C.) Primary Radiation
D.) Leakage Radiation
- ✔✔Leakage Radiation
