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GE M
S
EDICAL
YSTEMS
D
2392751-100, R
IRECTION
6-6-2
Image Quality Calibration
The image quality settings on the Vivid™ 4 17" monitor may need periodic adjustment due to changes
in ambient light. These adjustments can be easily made using the Contrast and Brightness buttons
on the front part of the display monitor. As the image quality settings are often adjusted, it is
recommended to check - and if necessary recalibrate - these settings on a regular basis.
This section describes how to calibrate image quality related settings for the Vivid™ 4 ultrasound unit
monitor, configured with software version 4.1 and above. This section complements the basic monitor
adjustment instructions described in the Vivid™ 4 User Manual.
Note:
When the monitor is too dark, and the user attempts to compensate by raising the total Gain
higher than normal, the resulting image quality may not be optimal.
Note:
When the system is first switched ON, the image may appear to be too dark, too light, or to have
too much contrast. The display monitor takes 20 minutes to warm up before it shows its final
contrast, brightness, and color hues. Therefore, Brightness and Contrast setting adjustments
should only be performed after the display monitor has warmed up.
1) Press the center button located on the front of the monitor (refer to
Contrast adjustment bar is displayed.
2) Use the other buttons on the front of the monitor (refer to
the left button to decrease the contrast or right button to increase the contrast. Refer to the
recommended settings in
3) When the Contrast setting is correct, press the center button again to make adjustments to the
Brightness. The Brightness adjustment bar is displayed.
4) Repeat Step 2 using the left and right buttons to select the correct Brightness adjustment. Refer to
the recommended settings in
Note: While performing these adjustments, it is useful to activate the Calibration Display window
(see
that the black square in the upper-left corner of the window is as dark as possible, while a
faint border remains visible between that square and the square to its right. The faint Vivid
logo will be just visible.
Note: These recommended settings are stable and do not drift over time, but may vary from monitor
to monitor. Adjust these recommended values to meet your specific requirements. For
example, cardiac users may prefer greater contrast, in which case set the contrast to 90 or
even 100. Radiologists may prefer less contrast, in which case set the contrast to below 80.
Table 6-10 Vivid™ 4 17" Monitor - Recommended Brightness and Contrast Settings
Brightness
Contrast
Note: Always perform the calibration in similar lighting conditions to those where the unit will be
used. If the unit is to be used in different lighting conditions, perform full calibration in both
dark and light conditions. It is suggested that you write down the brightness and contrast
settings for both conditions, so that the monitor can be reset to the calibrated values.
5) When the Brightness setting is correct, press the center button again to close the Brightness
adjustment bar. The scanning screen is displayed.
6) Perform monitor calibration (if required) as described in the
6-10
Section 6-6 - Vivid™ 4 17" Monitor Operation & Image Quality Calibration
3
EVISION
Table 6-10
Figure 6-7
on page 6-13) pressing <Ctrl> Q. Adjust the brightness of the monitor so
below.
Table 6-10
below.
Dark Room
40
80
V
™ 4 S
IVID
Figure 6-4
on page 6-9). The
Figure 6-4
on page 6-9), as follows. Press
Light Room
60
100
Monitor Calibration
section, page 6-13.
M
ERVICE
ANUAL
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