Spi exam review - Study guides, Class notes & Summaries

Sound waves are: a) electric b) mechanical, transverse c) spectral d) longitudinal, mechanical - D The speed of sound of ultrasound in soft tissue is closest to: a) 1,540 km/sec b) 1.54 km/sec c) 1,500 m/s d) 1,540 mm/sec - C Which is not an acoustic variable? a) density b) pressure c) distance d) intensity - D The effects of soft tissue on ultrasound are called: a) acoustic proliferation properties b) dynamic effects c) acoustic propagation properties d) biological effects - ...

EDELMEN'S SPI EXAM REVIEW

The Doppler effect is observed as a change in ________ And has units of _________. A. Amplitude, Watts B. power, Watts C. frequency, per second D. wavelength, millimeters - C. frequency, per second The Doppler effect is a change in a waves frequency when the sound source and the receiver of the sound are in motion relative to each other. frequency may be expressed as Hertz, Hz, cycles/sec, or per second. In clinical imaging, which reflectors produce most relevant Doppler shifts? A. Bloo...

Example of nonspecular reflector - ANSWER-red blood cells What happens to spatial pulse length when frequency increases? - ANSWER-decreases Axial resolution is dependent on? - ANSWER-wavelength Lateral resolution is dependent on? - ANSWER-beam diameter Where does the beam of an unfocused transducer diverge? - ANSWER-Fraunhofer zone Reverberation artifacts are a result of - ANSWER-two or more strong reflecting surfaces True/False: Grating lobes are essential for the proper opera...

SPI Exam Review: Chapter 1 Questions & Answers 2024 What is described as the ability of an object to resist compression and relates to the hardness of a medium? - ANSWER-Stiffness An increase in PRF would lead to: - ANSWER-An increase in Duty Factor Out of air, bone, soft tissue, and water, which has the highest propagation speed? - ANSWER-bone Out of water, soft tissue, bone, and lung tissue, which has the lowest propagation speed? - ANSWER-lung tissue As imaging depth increase...

SPI Exam Review | Questions and Correct Answers | Latest Update 2024/2025 What is a hydrophone? What does it measure? - Answer -A small needle with piezoelectric crystal at the end. It measures pressure in a sound beam. What is a schlieren? - Answer -A machine that uses acousti-optics to measure sound and light in beam profiles. What is a calorimeter? - Answer -A machine that can calculate total power of the beam measuring heat gain and the time itakes to obtain the heat. What is the ...

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SPI Exam Review questions and answers A+ score assured 2024/2025

ARDMS SPI EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. A mechanical transducer utilizes: a. transmit focus b. receive focus c. fixed focus d. dynamic aperture focusing - -c. fixed focus; sonographer cannot determine the location of # of foci. mechanical transducer uses cross sectional imaging, rotating wheel, wobbler, oscillating mirror A reflection will occur at the boundary of two media if the acoustic impedences of the two media are: a. equal b. different c. unchanged ...

The Doppler effect is observed as a change in ________ And has units of _________. A. Amplitude, Watts B. power, Watts C. frequency, per second D. wavelength, millimeters - C. frequency, per second The Doppler effect is a change in a waves frequency when the sound source and the receiver of the sound are in motion relative to each other. frequency may be expressed as Hertz, Hz, cycles/sec, or per second. In clinical imaging, which reflectors produce most relevant Doppler shifts? A. Bloo...