Chapter 2. Safety 2 - 17
▌ Electromagnetic environment – guidance
It is recommended to use ultrasound systems in shielded locations offering RF shielding
effectiveness, with shielded cables. Field strengths outside the location shielded from fixed
RF transmitters, as determined by an electromagnetic site survey, should be less than 3V/m.
It is essential to verify that the actual shielding effectiveness and filter attenuation of the
shielded location meet the minimum specifications.
CAUTION
If the system is connected to customer-supplied equipment, such as a local
area network (LAN) or a remote printer, Samsung Medison cannot
guarantee that the remote equipment will work correctly in the presence of
electromagnetic emission phenomena.
▌ Avoiding Electromagnetic Interference
Typical interference on Ultrasound Imaging Systems varies depending on Electromagnetic
phenomena. Please refer to the following table:
Imaging
mode
ESD
1
RF
2
Power Line
3
2D When changing the
operation mode or
system
configuration, or
reconfiguring the
system,
a short blinking
appears on the
image of the screen
or on the recorded
image.
For sector image probes, a
white radial band or blinking
appears on the center line of
the image.
For linear imaging probes, a
white radial band appears or
sometimes the image edge
will appear brighter.
White dot, line table, or
diagonal line is displayed
or a diagonal line is
displayed near the image
center.
M Background noise for the
image gets louder or a white
M mode line is displayed.
White dot, line table, or
diagonal line is displayed
or background noise for
the image gets louder.
Color The color blinks,
radial/vertical band appears,
background noise gets
louder, or color image
changes.
The color blinks, dot or
line table appears, or color
noise level changes.
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