Doppler Mode Controls - GE LOGIQ V2 User Manual

Performing an Exam

Doppler Mode Controls

Control
Auto Spectral
Optimize [ASO]
(Auto)
Set/ B Pause
Doppler sample
volume gate position
(Trackball)
Doppler sample
volume length
Scale (Velocity
Scale)
Angle Correct
Quick Angle
Wall Filter
Baseline
Mode Cursor
Angle Steer and Fine
Steer
Audio Volume
Invert
2-8
Doppler is intended to provide measurement data concerning
the velocity of moving tissues and fluids. PW Doppler lets you
examine blood flow data selectively from a small region called
the sample volume.
Table 2-4: Doppler Mode Controls
Bioeffect
Yes Auto in Doppler Mode optimizes the spectral data. Auto adjusts the
Velocity Scale/PRF (on live images only), baseline shift and invert
(if preset). The benefit of Auto can be found in reduced optimization
time and a more consistent and accurate optimization process.
Yes Toggles between B/CF mode and PWD mode when simultaneous
is not activated.
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 M/D cursor of the 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.
Description/Benefit
LOGIQ V2/LOGIQ V1
Direction 5610736-100 Rev. 9
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User Guide