Doppler Mode Controls - GE LOGIQ E9 User Manual

Performing an Exam

Doppler Mode Controls

Control
Update
SV Length
(Trackball)
Doppler sample
volume length (SV
Length)
Scale (Velocity
Scale)
Angle Correct/Auto
Angle
Quick Angle
Wall Filter
Baseline
Mode Cursor
Steer and Fine Steer
Audio Volume
Invert
Compression
(Dynamic Range)
Trace Method
(Spectral Trace)
Cycles to Average
Trace Sensitivity
2-8
Table 2-4: Doppler Mode Controls
Possible
Bioeffect
Yes Toggles between simultaneous and update presentation while
viewing the timeline.
Yes Moves the sample volume gate on the B-Mode's Doppler Mode
cursor. The gate is positioned over a specific position within the
vessel.
Yes Sizes the sample volume gate.
Yes Adjusts the velocity scale to accommodate faster/slower blood flow
velocities. Velocity scale determines pulse repetition frequency.
If the sample volume gate range exceeds single gate Scale
capability, the system automatically switches to high PRF mode.
Multiple gates appear, and HPRF is indicated on the display.
No Estimates the flow velocity in a direction at an angle to the Doppler
vector by computing the angle between the Doppler vector and the
flow to be measured.
NOTE: When the Doppler Mode Cursor and angle correct indicator
are aligned (the angle is O), you cannot see the angle correct
indicator.
No Quickly adjusts the angle by 60 degrees.
No Insulates the Doppler signal from excessive noise caused from
vessel movement.
No Adjusts the baseline to accommodate faster or slower blood flows to
eliminate aliasing.
No Displays the Doppler Mode cursor on the B-Mode image.
Yes You can slant the ROI of the Color Flow linear image left or right to
get more information without moving the probe. The angle steer
function only applies to linear probes.
No Controls audio output.
No Vertically inverts the spectral trace without affecting the baseline
position.
No Dynamic range controls how echo intensities are converted to
shades of gray, thereby increasing the range of contrast you can
adjust.
No Traces the average mean and peak velocities in realtime or frozen
images.
No The average value over a number of cycles (from 1-5).
No Adjust the trace to follow the waveform for signal strength.
Description/
Benefit
LOGIQ E9
Direction 5454884-100 English Rev. 1
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User Guide