LMRT State Review| 138 QUESTIONS| WITH COMPLETE SOLUTIONS

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. 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? 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 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 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