GE 5346769, Basic Service Manual

Page: 95 / 168

GE H
EALTHCARE
LOGIQ C3/C5 P
REMIUM
D
IRECTION
5341787-100, R
EVISION
8 B
ASIC
S
ERVICE
M
ANUAL
Chapter 4 Functional Checks 4 - 21
4-3-9-3 Color Flow Mode Softmenu Key
Table 4-10 Color Flow Mode Softmenu Key
Step Task Expected Result(s)
1
Threshold
Threshold assigns the gray scale level at
which color information stops.
2
Packet Size
Controls the number of samples gathered for
a single color flow vector.
3
Select Color maps
Allows a specific color map to be selected.
After a selection has been made, the color
bar displays the resultant map.
4
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.
5
Set Frame Average
Averages color frames. Press Frame
Average up/down to smooth temporal
averaging.
6
Color Invert
Views blood flow from a different perspective.
Press Invert to reverse the color map.
7
Adjust LIne Density
Trades frame rate for sensitivity and spatial
resolution. If the frame rate is too slow,
reduce the size of the region of interest,
select a different line density setting, or
reduce the packet size.
8
Activate Spatial Filter
9
Adjust Dynamic Range
Dynamic Range controls how echo
intensities are converted to shades of gray,
thereby increasing the adjustable range of
contrast.
10
Activate ACE
Eliminates the motion artifacts. Press Ace to
activate.
11
Adjust Angle Steer
Slants the Color Flow region of interest or the
Doppler line to obtain a better Doppler angle.
12
Move Baseline
Adjusts the baseline to accommodate faster
or slower blood flows to eliminate aliasing.
13
Change PRF
(Pulse Repetition Frequency)
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.
14
Transparency Map Allows to select specific transparency map
15
Focus Position
Increases the number of transmit focal zones
or moves the focal zone(s) so that you can
tighten up the beam for a specific area. A
graphic caret corresponding to the focal zone
position(s) appears on the right edge of the
image.
16
Capture