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Penny SPI review Questions And Answers

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What is enhancement caused by? - ANS weakly attenuating structures What is the multipath artifact? - ANS artifact caused by the sound beam bouncing off several different reflectors What is the typical value of PRF in diagnostic ultrasound? - ANS 1000-10,000 Hz or 1-10 ...

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  • October 27, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PENNY SPI
  • PENNY SPI
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Penny SPI review Questions And
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What is enhancement caused by? - ANS weakly attenuating structures

What is the multipath artifact? - ANS artifact caused by the sound beam bouncing off
several different reflectors

What is the typical value of PRF in diagnostic ultrasound? - ANS 1000-10,000 Hz or 1-10
KHz

What are specular reflections? - ANS reflections that occur when the sound impinges upon
a large, smooth reflector at a 90 degree angle.

What are non-specular reflections? - ANS reflectors that are smaller than the wavelength of
the incident beam

Half-intensity depth - ANS the depth at which sound has lost half of its intensity

phase quadrature - ANS the component of the Doppler device that determines positive
opposed to negative frequency shifts and, therefore, direction of blood flow

Fast Fourier Transform (FFT) - ANS a mathematical process used for analyzing and
processing the Doppler signal to produce the spectral waveform

What describes the distance from the beginning of a cycle to the end of that cycle? - ANS
wavelength

What reduces pulse duration? - ANS damping

What are harmonic signals? - ANS the result of sound traveling through the tissue and
inducing a vibration?

What are the three primary acoustic variables? - ANS pressure, density, distance(particle
motion)

What is backscatter? - ANS scattered sound waves that make their way back to the
transducer and produce an image on the display

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