SPI |Sonography Principles & Instrumentation|Bundle Pack Exams

Davies SPI REVIEW Test Bank with correct answers |All Verified

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - Answer d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - Answer ...

Sound waves are: - Answer longitudinal, mechanical The speed of sound in soft tissue is closest to: - Answer 1,500 m/s The frequency closest to the lower limit of ultrasound is: - Answer 15,000 Hz Which is not an acoustic variable? - Answer intensity The effects of soft tissu...

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? -...

When the ELASTICITY of a medium is HIGH, the _____ is HIGH - stiffness - prop. speed - compressibility - reflectivity - Answer compressibility What term describes the # of cycles that an acoustic variable completes in a second? - period - freq. - PRP - variable rate - ...

In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... - Answer Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? - Answer 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in - Answe...

Which artifact is illustrated by this image? - Answer a) Shadowing b) Side Lobe c) Reverberation d) Mirroring What is increased if the pulse duration is decreased? - Answer a) Bandwidth b) Line Density c) Frame Rate d) Duty Factor What is the most appropriate action for the ...

What is frequency determined by? - Answer The source, thickness of piezoelectric element and propagation speed to a lesser degree Thicker element is equal to ________ frequencies - Answer Lower What is the reciprocal of frequency and what is the symbol - Answer Period, T T...

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 - Answer Vector array, 3 MHz A sound wave is traveling in the body and propagates from muscle to air. ...

Sound waves are: a) electric b) mechanical, transverse c) spectral d) longitudinal, mechanical - Answer 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 - Answer C Which is not an acoustic var...

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 DF what has the higher propagation speed? air, bone, soft tissue or water - Answer bone ...

What is ergonomics, and what percentage of sonographers experience musculoskeletal injury related to work? - Answer studies the interaction between the sonographer, patient, and equipment to optimize the well being of the sonographer; 75% What is OSHA? - Answer regulatory agency Wh...