8.7.11 Frequency
PW CW CF PD HD-Flow TD
X - X X X X
The frequency setting controls the Transmit Frequency. It is common to work with the center
frequency [Frequ. Mid] of the ultrasound crystal. With a higher Transmit Frequency [Frequ.
High] lower flow velocities are displayed at a given PRF (advantage: better display of lower
flow velocities), but the penetration depth is reduced. With a lower Transmit Frequency [Frequ.
Low] the aliasing velocity is increased at a given PRF (advantage: display of higher flow
velocities), with increased sensitivity in depth.
Select the [Frequ.] key and select the suitable transmit frequency.
Low: The transmit frequency is lower than the center frequency of the crystal.
Mid: The transmit frequency is the center frequency of the crystal. High: The
transmit frequency is higher than the center frequency of the crystal.
Information of frequencies:
Chapter 5
.
8.7.11.1 Frequency for Elastography
Speps: penet - norm - resol
Doppler Modes
8-36
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4
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