GE HEALTHCARE Logiq Book XP series, Basic Service Manual

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GE H
EALTHCARE
D
IRECTION
5194296-100, R
EVISION
10 LOGIQ B
OOK
XP S
ERIES
B
ASIC
S
ERVICE
M
ANUAL
Chapter 4 Functional Checks 4-21
4-3-10-3 Doppler Mode OP Panel Controls
Table 4-10 Doppler Mode Softmenu Key
Step Task Expected Result(s)
1
Adjust Rejection
Selects a level below which echoes will not be amplified (an echo must have a
certain minimum amplitude before it will be processed).
2
Adjust Sweep Speed
Changes the speed at which timeline is swept. Press Sweep Speed up/down to
increase/decrease the value.
3
Activate Full Timeline Displays only timeline screen. Press the Full Timescreen to activate.
4
Select Display Format
Display layout can be preset to have B-Mode and Time-motion side-by-side or over-
under.
5
Adjust Frequency
Enables the adjustment of the probe’s operating frequency. Press Frequency and
select desired value. The selected frequency is displayed in the status window.
6
Trace Direction
7
Invert
Vertically inverts the spectral trace without affecting the baseline position. Press
invert to invert the spectral trace. The Plus and Minus signs on the velocity scale
reverse when the spectrum is inverted.
8
Auto Calculation
9
Modify Calcs
10
Trace Method
11
Activate Colorize
Colorize the gray scale image to enhance the eyes’ discrimination capability. Press
the Cololize, Trackball to cycle through available maps and press Set to select.
12
Activate Gray Map
Displays a map window adjacent to the image. Move the trackball to select the map.
The image reflects the map as scrolled through the selections. Press Set to select.
13
Dynamic Range
Controls how echo intensities are converted to shades of gray. Click Dynamic Range
to increase/decrease the value.
14
Adjust Angle Correct
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.
15
Adjust Quick Angle
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.
Currently only s/- 30, +/- 60 degree.
16
Move Baseline
Adjusts the baseline to accommodate faster or slower blood flows to eliminate
aliasing.
17
Change PRF (Pulse
Repetition Frequencies) -
(Wall Filter) Velocity scale determines pulse repetition frequency. If the sample volume gate
range exceeds single gate PRF capability, the system automatically switches to high
PRF mode. Multiple gates appear, and HPRF is indicated on the display.
18
Trace Sensitivity
19
Time Resolution
20
Spectral Average
21
Power output
Optimizes image quality and allows user to reduce beam intensity. 10% increments
between 0-100%. Values greater than 0.1 are displayed.
22
SV Length
Sizes the sample volume gate.
23
Wall Filter
Wall Filter insulates the Doppler signal from excessive noise caused from vessel
movement.