GE Healthcare Brivo XR118 Service Manual page 295

GE H
EALTHCARE
D 5461425-8EN, R
IRECTION
EMI Reduction
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 12-34
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:
Note:
Grid Line Reduction Single Energy
Grid line reduction is to reduce grid line in single energy image. It can be
turned on and off in Utility-->Image Processing. Default setting is On.
Note:
Note:
6
EVISION
Image with EMI Reduction OFF vs Image with EMI Reduction ON
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.
EMI option is configurable to each individual receptor. Those options are Digital
Cassette, Wallstand and Table.
When GLR is turned ON it will add approximately 1 second to image processing
time. With GLR ON, the final image will include "GLR" in its annotation.
Make sure the correct grid line rate selected in "Grid Line Rate"page.
Chapter 12 - - Set Preferences
B XR118 S M
RIVO ERVICE ANUAL
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