Optimizing Spectral Doppler
LOGIQ 7 Online Help 5-103
Direction 2392536-100 Rev. 1
Audio Volume
Description Controls audio output.
Adjusting To adjust the audio, adjust the Volume control. The volume
defaults to the last Doppler audio volume setting.
Values Usually, a one-third adjustment of the dial gives you the best
volume. The volume decreases/increases logarithmically.
Benefits An audio representation of the flow within a vessel can be used
to evaluate proper probe angle and position.
Invert
Description Vertically inverts the spectral trace without affecting the baseline
position.
Adjusting To invert the spectral trace, press Invert. The plus (+) and minus
(-) signs on the velocity scale reverse when the spectrum is
inverted.
Positive velocities display below the baseline and to the left
speaker (as you face the system).
Positive velocities display below the baseline.
Values Forward/reverse. The trace corresponds to flow direction
(positive flow is forward flow toward the probe or negative flow is
reverse flow away from the probe). The invert setting is returned
to the factory or user preset value when you change the
following: Probe, Exam Category, Exam Calcs, or New Patient.
In Triplex, both Color Flow and Doppler Mode velocity scales
are inverted.
Benefits If you change the probe angle to accommodate anatomy, blood
flow still moves in the same direction, but the Doppler
information will be reversed. It is easier in cases like this to
invert the spectrum instead of reversing the probe orientation.
Affect on other
controls
The polarity of Doppler Audio is also reversed.
CAUTION
Audio sounds change rapidly, often abruptly. Increase the
volume in small steps to avoid startling the patient.
To Next Page
Loading...
Need help?
General
