LMRT-Radiography Essentials| 209 QUESTIONS| WITH COMPLETE SOLUTIONS

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? correct answer: Increase kVp by 30% Which of the following (IR) system speeds will result in the lowest patient dose? correct answer: Faster speed IR system What is the primary purpose of using gonad shields during radiography? correct answer: Reduce the likelihood of genetic effects Contact & shadow are two types of gonad shield correct answer: TRUE When should gonad shields be used? correct answer: 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: correct answer: repeat exposures The limited operator can reduce repeat exposures by: correct answer: clearly instructing patients How does x-ray beam restriction minimize patient 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 correct answer: Collimator How does filtration reduce patient 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 correct answer: 2.5mm Al Equivalent What are the three principal methods used to protect limited operators from unnecessary radiation exposure? correct answer: 1. Time 2. Distance 3. Shielding Which of the following is NOT a type of personnel radiation shielding? correct answer: a. Apron b. Glove c. Thyroid shield d. Shadow******** CORRECT Personnel shielding must be worn on the rare occasion duri