GE H48651KR, Service Manual

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GE V
OLUSON
i / V
OLUSON
e
D
IRECTION
KTI106052, R
EVISION
10 S
ERVICE
M
ANUAL
4-14 Section 4-4 - Functional Checks
For further details refer to the Voluson i / Voluson e Basic User Manual:
• Chapter “CFM Mode (Color Flow Mode)”
• Chapter “PD Mode (Power Doppler Mode)”
9
BASELINE
The baseline shift can be used to prevent aliasing in one flow direction similar to the Doppler
baseline shift. Press the Soft-menu buttons to move the baseline up/down.
This function is only available in Color Doppler.
10
ZOOM Press the Soft-menu buttons for image magnification (pan zoom) in read and write mode.
11
PRF
The Velocity Range display is governed by the pulse repetition frequency (PRF).
Press the Soft-menu buttons to adjust the velocity range desired
12
ENSEMBLE Controls the number of pulses to constitute one Color- or Power-Doppler line in the display.
13
SM. RAISE
To select different filter periods for raising velocity.
Filtering of the rise velocity leads to noise suppression.
14
SM. FALL
To select different filter periods for falling velocity.
This filter leads for “prolongation” of the display flow.
15
BALANCE
The Balance controls the amount of Color display over bright echoes and helps to confine
color within the vessels wall.
16
FREQUENCY
It serves for selection of the Transmit Frequency which also depends on the Color Box
position.
17
LINE DENS
Determines the line density within the Color-Box.
The lower the line density, the larger the line distance and the size of the color pixels.
18
LINE FILTER
With “Line Filter” the signals of the neighboring pulses are less weighted for the display of the
actual pulse which considerably improves the detail lateral resolution and signal-to-noise ratio.
19
FLOW RES
The “Flow Resolution” function controls the axial resolution of color in the display.
It adjusts the axial sample depth of color pixels.
20
GENTLY COLOR
Gently means the transition between color and gray scale information.
The embedding of the color into 2D Mode is performed smoothly with less colored splashes.
21
ARTEFACT (on/off) Switch on/off the artifact suppression.
22
DISPLAY MODE To select the CFM- Display Mode.
23
SCALE (Color only) The maximum velocities are displayed above and under the color scale in kHz, cm/s or m/s.
24
CFM / PD / HD MAP
Provides selectability of the color coding for an optimization of the display of blood flow (similar
to the post-processing curves with grayscale 2D scans).
After a selection has been made, the color bar displays the resultant map.
25
EXIT
Press the
EXIT
key on the control panel to exit the Color or PD Sub menu.
Table 4-6 Color Flow Mode (Color or Power Doppler) Functions HD
Step Task Expected Results