COMPLETE SOLUTIONS - COMPLETE SOLUTIONS Which of the following state...

LMRT State Review| 138 QUESTIONS| WITH

COMPLETE SOLUTIONS 2023/2024

Which of the following statements are correct regarding the link between radiation dose and genetic effects?

• The link has been demonstrated in human studies.
• The link has been demonstrated in animal studies.
• increased risk to humans cannot be predicted with respect to an individual. - Correct Answer 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% - Correct 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. - Correct 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 - Correct Answer Reduce the likelihood of genetic changes Which one of the following are types of gonad shields?

• Aperture 1 / 4

• Contact
• Shadow

A.) 1 and 2 only B.) 1 and 3 only C.) 2 and 3 only D.) 1, 2, and 3 - Correct 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 - Correct Answer when the gonads are within

• 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 - Correct 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 - Correct 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 2 / 4

C.) It limits the effect of patient motion D.) It limits repeat exposure - Correct 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 - Correct 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 - Correct 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) B.) 1.5mm AL Equiv C.) 2.5mm Al Equiv D.) 3.5mm Al Equiv - Correct Answer 2.5mm Al Equiv What are the three principal methods used to protect limited operators from unnecessary radiation exposure?

• Time, Distance, and Shielding

B.) Time, Distance, and Collimation C.) Distance, Collimation, and Shielding D.) Time, Collimation, and Filtration - Correct Answer Time, Distance, and Shielding 3 / 4

Which of the following is not a type of personnel radiation shielding?A.) Apron B.) Glove C.) Thyroid Shield D.) Shadow - Correct Answer 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 - Correct Answer 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 - Correct Answer Leakage Radiation Why are limited operators prohibited from activities that results in direct exposure to the primary x-ray beam?A.) They are considered occupationally exposed individuals B.) These activities carry immediate health risk C.) Their interaction with the beam will affect patient dose D.) Their presence near the patient increases liability - Correct Answer They are considered occupationally exposed individuals

Distance, as a method used to limit operator exposure, means that:

A.) The operator should maximize the distance from the source during an exposure.

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