Ch. 5 Wkst 7 & 8 Flashcards
1
Q
Doppler Spectrum
A
the range of frequencies present in Doppler-shifted echoes.
2
Q
Spectral Doppler Display
A
the presentation of Doppler information in a quantitative form. Visual display of a Doppler spectrum.
3
Q
Range Gate
A
a device that allows only echoes from a selected depth (arrival time) to pass.
4
Q
Duplex Instrument
A
an ultrasound instrument that combines gray-scale sonography with pulsed Doppler and possibly, CW Doppler.
5
Q
Fast Fourier Transform (FTT)
A
a mathematical technique used to generate Doppler shift spectral displays.
6
Q
Spectral Broadening
A
the widening of the Doppler-shift spectrum or the increase in the range of Doppler-shift frequencies present that occurs because of a broadened range of flow velocities encountered by the sound beam.
