Ultrasound Physics - Mock Exam Questions for SPI With Correct Answers 2024/2025

Which of the following transducers will have the worst axial resolution? a. Vector array, 3 MHz b. Linear Sequential Array, 6 MHZ c. Linear Phased Array 7.5 MHZ d. Annular Array, 6 MHz - Correct Answer Vector array, 3 MHz A sound wave is traveling in the body and propagates from muscle to air. What percentage of the sound wave is most likely reflected at the muscle-air boundary? a. 0.5% b. 75% c. 25% d. 5% e. 99% - Correct Answer 75% Which of the following lists is in decreasing order? a. mega, kilo, deca, milli, nano b. centi, mill, kilo, mega, nano c. micro, milli, deci, kilo, mega d. micro, kilo, mega, deci, milli e. mega, micro, deci, milli, hecto - Correct Answer mega, kilo, deca, milk, nano During a diagnostic exam, which of these statements is most correct when describing the pulsed echo characteristics of an ultrasound system. a. The listening time may be one-thousand times longer than the pulse duration. b. the pulse duration is longer than the pulse repetition period. c. The pulse duration is similar to the listening time. d. The duty factor has a value close to 1 e. The pulse repitition period is similar to the period. - Correct Answer The listening time may be one-thousand times longer than the pulse duration. Which of the following parameters is determined by both the ultrasound system and the medium through which the sound travels? a. period b. frequency c. temperature d. wavelength e. velocity of the sound - Correct Answer wavelength You should be familiar with the formula L= C/F. What does "C" stand for in this equation? a. characteristic impedence b. density