GE H48681XB, Service Manual

Page: 142 / 366

Step Task Expected Results
4 2D+2D/C (PD, HD-Flow or TD) Changes the Single image display to two simultaneous half images. The left frame
shows only the 2D Mode image. The right frame shows the 2D Mode image with color
information.
5 Invert The color of the color wedge inverts around the baseline. (impossible in PD Mode)
6 Zoom Image magnification (PAN-Zoom) in read- and write mode.
7 Quality Improves the Color Resolution by reducing the image frame rate, respectively vice
versa.
8 WMF (Wall Motion Filter) Used to eliminate Doppler “noise” that is caused by vessel wall or cardiac wall motion.
(CFM,PD, HD-Flow)
9 PRF By touching toward up the PRF increases. By touching toward the PRF decreases.
10 Threshold After Freeze you can adjust the Color Threshold. It eliminates small color noise or
motion artifact signals in the color image. (small number cuts off less signals than a
higher setting)
11
Displ.Mode
To select the CFM- Display Mode (V; V-T; V-Pow; Pow-T; or T).
12 Smooth To select different filter periods for rising velocity and falling velocity. Rise Filtering of
the rise velocity leads to noise suppression.
Fall This filter leads for “prolongation” of the
display flow.
13 Frequ. It serves for selection of the Transmit Frequency which also depends on the Color Box
position.
14 Ensemble Controls the number of pulses to constitute one Color-, Power-Doppler or HD-Flow line
in the display.
15
Flow Res.
This function controls the axial resolution of color in the display. It adjusts the axial
sample depth of color pixels.
16
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.
17 Scale (CFM, HD-Flow, TD) The maximum velocities are displayed above and under the color scale in kHz, cm/s or
m/s.
18 CFM Map (PD, HD-Flow, TD) To select 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.
19 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. To activate
the “Gently Color” function, touch the
CFM Map (PD, HD-Flow, TD) key in the Sub
menu.
20 Balance The Balance controls the amount of Color display over bright echoes and helps to
confine color within the vessel walls.
21
Artifact (on/off)
Switch on/off the artifact suppression.
22 Baseline The baseline shift can be used to prevent aliasing in one flow direction similar to the
Doppler baseline shift. (Impossible in PD Mode.)
23
Line F.
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.
Note
For further details refer to the Voluson E-Series Basic User Manual.
Functional Checks
4-16
Voluson E-Series Service Manual
KTD106657 Revision 2