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Lead Markers
As in any General Radiography procedure, lead marker placement is important to ensure markers are
properly recorded on the image. Place the lead marker in an area of patient attenuation. If lead markers
are placed in regions of direct radiation (saturation), there is a high risk they will be processed out of the
image during image processing. Saturated areas beyond the anatomy are no longer part of the final
image. This is most likely to happen on high technique exposures.
CAUTION:
Exercise care when placing lead markers to guarantee their presence in the final image.
Every attempt must be made to assure markers are not located in regions of direct
radiation, but are located in regions where some patient attenuation of radiation is present
without obstructing the anatomical information of interest.
System Status and Messages
Several types of messages and indicators are displayed on the Acquisition Workstation screens to inform
you of the system and subsystem operational status as well as error messages. The complete list of error
messages is available in the Service Manual.
Expose Hold
The Expose Hold button (Figure 4-6) appears at the bottom of the Worklist or Acquisition screens when
there is some condition that prevents an x-ray from being taken, such as no exam is open or the protocol
is not selected.
Press the Expose Hold button to view a list of all errors and interlocks that are preventing the exposure
(Figure 4-6). The items are removed from the list as they are corrected. The Expose Hold button
disappears when all errors and interlocks are corrected.
Figure 4-6 Worklist and Acquisition screen Expose Hold button
Definium 5000 X-Ray System
Operator Manual
5197809-1EN
Rev. 4 (13 February 2008)
© 2008 General Electric Company. All rights reserved.
Chapter 4: General Information
4-7
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