Device Standards
HD11 XE Getting Started
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Table 6-7 Typical Interference on Ultrasonic Imaging Systems
Imaging
Mode ESD
a
a. Electrostatic discharge (ESD) caused by discharging of electric charge build-up on insulated sur-
faces or persons.
RF
b
b. Radio frequency (RF) energy from RF transmitting equipment such as portable phones,
hand-held radios, wireless devices, commercial radio and TV stations, and so on.
Power Line
c
c. Conducted interference on power lines or connected cables caused by other equipment such as
switching power supplies, electrical controls, and natural phenomena such as lightning.
2D or
3D/4D
Change of operating
mode, system
settings, or system
reset.
Brief flashes in the
displayed or
recorded image.
For sector imaging
transducers, white radial
bands or flashes in the
centerlines of the image.
For linear imaging
transducers, white
vertical bands,
sometimes more
pronounced on the
sides of the image.
White dots, dashes,
diagonal lines, or
diagonal lines near
the center of the
image.
Color Color flashes, radial or
vertical bands, increase
in background noise, or
changes in image color.
Color flashes, dots,
dashes, or changes in
the color noise level.
Doppler Horizontal lines in the
spectral display, tones
and abnormal noise in
the audio, or both.
Vertical lines in the
spectral display,
popping noise in the
audio, or both.
M-mode Increase in the image
background noise or
white M-mode lines.
White dots, dashes,
diagonal lines, or
increase in image
background noise.
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