1 | Page
LMRT-Radiography Essentials Questions
and Correct Answers/ Latest Update /
Already Graded
Which of the following changes in (KVP) will result in the greatest
reduction of patient dose, when (MAS) is adjusted to compensate
for the change?
Ans: Increase kVp by 30%
Which of the following (IR) system speeds will result in the lowest
patient dose?
Ans: Faster speed IR system
What is the primary purpose of using gonad shields during
radiography?
Ans: Reduce the likelihood of genetic effects
Contact & shadow are two types of gonad shield
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Ans: TRUE
When should gonad shields be used?
Ans: When the gonads are within 5cm of the radiation field
The greatest cause of unnecessary radiation to patients that can be
controlled by the limited operator are:
Ans: repeat exposures
The limited operator can reduce repeat exposures by:
Ans: clearly instructing patients
How does x-ray beam restriction minimize patient exposure
Ans: 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
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Ans: Collimator
How does filtration reduce patient exposure
Ans: Removes longer wavelength photons
What is the National Council on Radiation Protection and
Measurements (NCRP) recommendation for the amount of total
filtration
Ans: 2.5mm Al Equivalent
What are the three principal methods used to protect limited
operators from unnecessary radiation exposure?
Ans: 1. Time
2. Distance
3. Shielding
Which of the following is NOT a type of personnel radiation shielding?
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Ans: a. Apron
b. Glove
c. Thyroid shield
d. Shadow******** CORRECT
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 the patient in maintaining the proper
position. What is the source of the greatest radiation hazard under
this circumstance?
Ans: Scattered radiation from the patient
What is the term from radiation that escapes from the x-ray tube
housing?
Ans: leakage radiation
LMRT-Radiography Essentials Questions
and Correct Answers/ Latest Update /
Already Graded
Which of the following changes in (KVP) will result in the greatest
reduction of patient dose, when (MAS) is adjusted to compensate
for the change?
Ans: Increase kVp by 30%
Which of the following (IR) system speeds will result in the lowest
patient dose?
Ans: Faster speed IR system
What is the primary purpose of using gonad shields during
radiography?
Ans: Reduce the likelihood of genetic effects
Contact & shadow are two types of gonad shield
,2 | Page
Ans: TRUE
When should gonad shields be used?
Ans: When the gonads are within 5cm of the radiation field
The greatest cause of unnecessary radiation to patients that can be
controlled by the limited operator are:
Ans: repeat exposures
The limited operator can reduce repeat exposures by:
Ans: clearly instructing patients
How does x-ray beam restriction minimize patient exposure
Ans: 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
,3 | Page
Ans: Collimator
How does filtration reduce patient exposure
Ans: Removes longer wavelength photons
What is the National Council on Radiation Protection and
Measurements (NCRP) recommendation for the amount of total
filtration
Ans: 2.5mm Al Equivalent
What are the three principal methods used to protect limited
operators from unnecessary radiation exposure?
Ans: 1. Time
2. Distance
3. Shielding
Which of the following is NOT a type of personnel radiation shielding?
, 4 | Page
Ans: a. Apron
b. Glove
c. Thyroid shield
d. Shadow******** CORRECT
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 the patient in maintaining the proper
position. What is the source of the greatest radiation hazard under
this circumstance?
Ans: Scattered radiation from the patient
What is the term from radiation that escapes from the x-ray tube
housing?
Ans: leakage radiation
