Chapter 15: Preferences
5495975-1EN Rev.9
15-58
© 2013-2017 General Electric Company. All rights reserved.
Electromagnetic Interference (EMI) Reduction
Overview
Image artifacts can be caused when the Digital Detector acts like an antenna, picking up
electromagnetic signals emitted by external equipment in the area. Artifacts are periodic lines or bands
in the image. EMI artifacts can be intermittent, depending on external signals present, as well as the
relative timing between the detector readouts and the peaks of the electromagnetic signals.
To remove EMI artifacts from images you can use an image processing feature called EMI Reduction to
try to remove as much of the artifact as possible. EMI reduction occurs prior to the raw image being
displayed. Reprocessing an image will have no impact on EMI – if the artifacts are present on an image,
they will still be present on a reprocessed image; if the artifacts are absent on an image, they will still be
absent on a reprocessed image.
Figure 15-46
Image with EMI Reduction OFF vs Image with EMI Reduction ON
Table 15-11
EMI Reduction Setting
The default setting for EMI Reduction is OFF. In order for EMI Reduction to be performed on any image,
the feature must be turned ON. This will only apply to future acquisitions taken after the feature is turned
on.
NOTE:
When EMI Reduction is turned ON it will add approximately 2 seconds to image processing time.
With EMI Reduction ON, the final image will include "EMI" in its annotation.
Number
Definition
1
EMI Reduction OFF
2
EMI Reduction ON
