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The Doppler Velocity Waveform
Author(s) -
Pellett Andrew A.,
Kerut Edmund K.
Publication year - 2006
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.2006.00256.x
Subject(s) - library science , center (category theory) , state (computer science) , health science , medicine , gerontology , mathematics , chemistry , computer science , medical education , algorithm , crystallography
Figure 1. Spectral analysis and the Doppler display. The fast Fourier transform (FFT) separates the Doppler signal into its component Doppler-shift frequencies and determines the amplitude at each frequency. Most ultrasound machines calculate Doppler-shifted frequencies over 5 msec increments and convert this to velocity information. These velocities are then displayed in a bin whose brightness is proportional to the amplitude of the signal. Spectral Analysis and the Doppler Display