GE LOGIQ E9

Performing an Exam
2-8 LOGIQ E9 – User Guide
Direction 5454884-100 English
Rev. 1
Doppler Mode Controls
Table 2-4: Doppler Mode Controls
Control
Possible
Bioeffect
Description/
Benefit
Update Yes Toggles between simultaneous and update presentation while
viewing the timeline.
SV Length
(Trackball)
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.
Doppler sample
volume length (SV
Length)
Yes Sizes the sample volume gate.
Scale (Velocity
Scale)
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.
Angle Correct/Auto
Angle
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.
Quick Angle No Quickly adjusts the angle by 60 degrees.
Wall Filter No Insulates the Doppler signal from excessive noise caused from
vessel movement.
Baseline No Adjusts the baseline to accommodate faster or slower blood flows to
eliminate aliasing.
Mode Cursor No Displays the Doppler Mode cursor on the B-Mode image.
Steer and Fine Steer 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.
Audio Volume No Controls audio output.
Invert No Vertically inverts the spectral trace without affecting the baseline
position.
Compression
(Dynamic Range)
No Dynamic range controls how echo intensities are converted to
shades of gray, thereby increasing the range of contrast you can
adjust.
Trace Method
(Spectral Trace)
No Traces the average mean and peak velocities in realtime or frozen
images.
Cycles to Average No The average value over a number of cycles (from 1-5).
Trace Sensitivity No Adjust the trace to follow the waveform for signal strength.