Penny SPI review questions
What will happen to the patients body is HE/SHE is in shock? - ✔️✔️drop in blood
pressure
decreased respiration
tachycardia
chest pain
loss of mental alertness
What describes the distance from the beginning of a cycle to the end of that cycle? -
✔️✔️wavelength
What are the three primary acoustic variables? - ✔️✔️pressure, density,
distance(particle motion)
What is the multipath artifact? - ✔️✔️artifact caused by the sound beam bouncing off
several different reflectors
What is the typical value of PRF in diagnostic ultrasound? - ✔️✔️1000-10,000 Hz or 1-
10 KHz
What are specular reflections? - ✔️✔️reflections that occur when the sound impinges
upon a large, smooth reflector at a 90 degree angle.
What are non-specular reflections? - ✔️✔️reflectors that are smaller than the
wavelength of the incident beam
Half-intensity depth - ✔️✔️the depth at which sound has lost half of its intensity
phase quadrature - ✔️✔️the component of the Doppler device that determines positive
opposed to negative frequency shifts and, therefore, direction of blood flow
Fast Fourier Transform (FFT) - ✔️✔️a mathematical process used for analyzing and
processing the Doppler signal to produce the spectral waveform
What is enhancement caused by? - ✔️✔️weakly attenuating structures
What reduces pulse duration? - ✔️✔️damping
What are harmonic signals? - ✔️✔️the result of sound traveling through the tissue and
inducing a vibration?
What will happen to the patients body is HE/SHE is in shock? - ✔️✔️drop in blood
pressure
decreased respiration
tachycardia
chest pain
loss of mental alertness
What describes the distance from the beginning of a cycle to the end of that cycle? -
✔️✔️wavelength
What are the three primary acoustic variables? - ✔️✔️pressure, density,
distance(particle motion)
What is the multipath artifact? - ✔️✔️artifact caused by the sound beam bouncing off
several different reflectors
What is the typical value of PRF in diagnostic ultrasound? - ✔️✔️1000-10,000 Hz or 1-
10 KHz
What are specular reflections? - ✔️✔️reflections that occur when the sound impinges
upon a large, smooth reflector at a 90 degree angle.
What are non-specular reflections? - ✔️✔️reflectors that are smaller than the
wavelength of the incident beam
Half-intensity depth - ✔️✔️the depth at which sound has lost half of its intensity
phase quadrature - ✔️✔️the component of the Doppler device that determines positive
opposed to negative frequency shifts and, therefore, direction of blood flow
Fast Fourier Transform (FFT) - ✔️✔️a mathematical process used for analyzing and
processing the Doppler signal to produce the spectral waveform
What is enhancement caused by? - ✔️✔️weakly attenuating structures
What reduces pulse duration? - ✔️✔️damping
What are harmonic signals? - ✔️✔️the result of sound traveling through the tissue and
inducing a vibration?
