Ultrasound Physics - Mock Exam Questions for SPI Exam Questions with Answers

Ultrasound Physics - Mock Exam Questions for SPI Exam Questions with Answers-A 6 foot tall supine patient has normal hemodynamics. The patient's arterial blood pressure is 140 mmHg. The patient extends their right arm high above their head. What is the hydrostatic pressure at the ankle of this patient? a. 0 mmHg b. -50 mmHg c. 92 mmHg d. 50 mmHg e. 6 mmHg - 0 mmHg A higher mechanical index is consistent with an increased likelyhood of cavitation. Which of these choices is associated with a high mechanical index? a. extreme peak rarefactional pressure and short wavelength b. extreme peak rarefactional pressure and extremely short wavelength c. extreme peak rarefactional pressure and high frequency d. extreme peak compression pressure and high frequency e. extreme peak rarefactional pressure and low frequency - extreme peak rarefactional pressure and low frequency A linear sequential array probe has 128 crystals. In this case, how many of these will be fire silmultaneously for each sound pulse penetrating into the body? a, 1 b. 6 c. 128 d. 64 - 6 A single, disc shaped transducer crystal is 8 mm in diameter. The focal depth is 3 cm. The beam is unfocused. What is the diameter of the sound beam as it leaves the transducer? a. 2 mm b. 8mm c. 32 mm d. 16 mm e. 3 mm - 8mm A sonographer adjusts the outout of an ultrasound system by increasing the amplitude by a factor of three. Which of the following statements is true? a. power is increased by a factor of three b. wavelength is increased by a factor of nine c. power is increased by a factor of nine d. frequency in increased by a factor of three e. period is decreased by a factor of three - power is increased by a factor of nine A sonographer decreases the number of foci in an image from 4 to 2. Which of the following statements is most correct? a. lateral resolution decreases and temporal resolution increases b. lateral resolution increases and axial resolution increases c. axial resolution increases and temporal resolution decreases d. axial resolution increases and temporal resolution increases e. lateral resolution increases and temporal resolution decreases - lateral resolution decreases and temporal resolution increases A sonographer increases the number of foci from 1 to 4. Which of the following statements is most correct? a. lateral resolution decreases and temporal resolution increases b. lateral resolution increases and axial resolution increases c. axial resolution increases and temporal resolution decreases d. axial resolution increases and temporal resolution increases e. lateral resolution increases and temporal resolution decreases - Lateral resolution increases and temporal resolution decreases A sonographer is scanning a patient with a 3 MHz probe and replaces it with a 6 MHz probe. All of the following statements are FALSE, except: a. The 6 MHz beam will travel at a lower speed than the 3 MHz beam b. The 6 MHz beam will travel faster than the 3 MHz beam c. The 3 MHz beam will have a higher frequency than the 6 MHz beam d. The 6 MHZ beam will have a longer period than the 3 MHz beam e. The 3 MHz beam will have a longer wavelength than the 6 MHz beam - The 3 MHz beam will have a longer wavelength than the 6 MHz beam A sound beam is travelling from medium B to Medium G. Under which of the following conditions will reflection always occur? a. similar speeds, perpendicular incidence b. identical density and normal incidence c. dissimilar impedence and orthogonal incidence d. different density and oblique incidence e. different impedences and oblique incidence - dissimilar impedance and orthogonal incidence 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% - 75%