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GE H
EALTHCARE
D
5394227, 12
IRECTION
4-4-10-3
Adjust the TVI Controls
•
To reduce quantification noise (variance), the Nyquist limit should be as low as possible, without
creating aliasing. To reduce the Nyquist limit: Reduce the Scale value.
NOTE:
The Scale value also affects the frame rate. There is a trade off between the frame rate and
quantification noise.
•
TVI provides velocity information only in the beam direction. The apical view typically provides the
best window since the beams are then approximately aligned to the longitudinal direction of the
myocardium (except near the apex). To obtain radial or circumferential tissue velocities, a
parasternal view must be used. However, from this window the beam cannot be aligned to the
muscle for all the parts of the ventricle.
NOTE:
PW will be optimized for Tissue Velocities when activated from inside TVI.
4-4-11
SWE (Shear Wave "Shear Elasto") Functional Check
•
Select a probe (9L D and C1-6D).
•
Select ELASTO button.
•
In the Touch Panel, select Shear Wave button if not already selected.
•
Verify that the Shear Wave button is available.
4-4-12
Cineloop Check
4-4-12-1
Introduction
A cineloop is a sequence of images recorded over a certain time frame. When using ECG the time frame
can be adjusted to cover one or more heart cycles. When frozen, the System automatically displays the
cineloop boundary markers on either side of the last detected heart cycle.
4-4-12-2
Preparation
1.) Connect one of the probes, to the scanner's active probe connector.
-
-
2.) Turn ON the scanner. The B-Mode window is displayed (default mode).
4-4-12-3
Checks
1.) Press Freeze.
2.) Rotate the Trackball to scroll through the acquisition and find the sequence of interest.
3.) Select Run/Stop to playback the loop.
4.) Select Run/Stop again to stop the CINE Loop.
5.) Adjust Cycle select to move from heart beat to heart beat and select the heart cycle of interest.
6.) Adjust Num cycles to increase or decrease the number of heart beats to be played back.
4 - 32
PROPRIETARY TO GE
see:
3-6-4 "Connecting Probes" on page 3-15
For available probes, see:
Section 4-4 - Functional Checks
for info about connecting the probes.
Section 9-13 "Probes" on page
LOGIQ S8/LOGIQ E8 S
9-59.
M
ERVICE
ANUAL
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