Color Flow Control Panel Control; Scanning Hints - GE Medical Systems LOGIQ 7 Quick Manual

LOGIQ 7 Quick Guide
Color Flow/PW Doppler Image Optimize (continued)
Modify Auto Calcs
Press to select desired Auto Calcs.
Trace Sensitivity
In Auto Calcs, increase to pick up more signal or
decrease to pick up less signal.
Trace Direction
Select Above, Below, or Both.
Auto Calcs
Specify Auto Calcs Off/Live/Frozen.
Quick Angle
Quickly adjusts the angle by 60 degrees.
Sample Volume Gate Length
Sizes the sample volume gate.
Trace Method
Specify Max, Mean, or Off.
Duplex
Duplex on: simultaneous B-Mode and PW Mode;
Duplex off: toggle live B-Mode and PW via B Pause.
PW/CF Ratio
Adjusts the ratio between Spectral Doppler and
Color Flow.
Direction 2291859-100 Rev. 1
Compression
Increase to make frozen image appear more
contrasty; decrease to make frozen image appear
softer.
Time Resolution
Lower makes the image appear smoother; higher
makes the image appear sharper.

Color Flow Control Panel Control

Scan Area. Toggles between the CFM ROI window
size and position.
M/D Cursor. Activates the Doppler cursor.

Scanning Hints

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.
Wall Filter. Affects low flow sensitivity
versus motion artifact.
To improve sensitivity. Increase Gain,
decrease PRF, increase Power Output,
adjust Line Density, decrease Wall Filter,
increase Frame Averaging, increase
Packet Size, reduce ROI to the smallest
reasonable size, and position the Focal
Zones properly.
To decrease motion artifact. Increase the PRF,
and increase the Wall Filter.
To eliminate aliasing. Increase the PRF and lower
the Baseline.
For venous imaging. Ensure that you have
selected the vascular exam category, select a
venous application, select the appropriate probe for
very superficial structure, select two focal zones,
adjust the depth to the anatomy to be imaged,
maintain a low gain setting for gray scale, activate
Color Flow, maintain the PRF at a lower setting, and
increase Frame Averaging for more persistence.
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