LOGIQ 7/LOGIQ 7 Pro Quick Guide
Direction 5307393-100 Rev. 1
10
Color Flow/Doppler Mode
Image Optimize
Color Flow/Doppler Image Optimize
PW/CF Ratio
The PW/CF Ratio is active when “Depend Triplex” is on in
triplex mode. It is used to set the PRF ratio between PW
and CFM.
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.
Flash Suppression
Activates/deactivates Flash Suppression, a motion
artifact elimination process.
Color Flow Control Panel Control
Scan Area.
Toggles between the CFM ROI window size
and position.
M/D Cursor.
Activates the Doppler cursor.
PFD Mode (Option. LOGIQ 7 only).
PFD Mode shows
pulsation of a flow superimposed on a PDI or Directional
PDI image. Using PFD, you can differentiate between
pulsatile flow in the liver arteries (green) and non-pulsatile
flow in the Portal vein at one glance. Flow existence, flow
direction and vasculature information are available.
PDI Mode
is a color flow mapping technique used to map
the strength of the Doppler signal coming from the flow
rather than the frequency shift of the signal.
Continuous Wave Doppler
Allows examination of blood flow data all along the
doppler cursor rather than from any specific depth.Gather
samples along the entire Doppler beam for rapid
scanning of the heart. Range gated CW allows
information to be gathered at higher velocities.
There are two CW Doppler operating modes:
Steerable
- Allows viewing of the B-Mode image to
position the Doppler cursor to the area of interest while
viewing the Doppler Spectrum (shown below the B-mode
image) and listening to the Doppler audio signal. Works
with only Sector Probes.
Non-Imaging
- Provides only Doppler Spectrum and
Audio for ascending/descending aortic arch, other hard-
to-get-to spaces or higher velocities. Requires a single
CWD probe and adapter. Works with only CWD Probes
(P2D and P6D).
Scanning Hints
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.
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.
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.
