Chapter 13: Digital Detector
Optima XR220amx X-Ray System 54400222-1EN Rev 1 DRAFT 11092010 13-14
Operator Manual © 2010 General Electric Company. All rights reserved.
Figure 13-15 Detector fault condition
In this condition the battery LED’s may be lit to show the condition of the battery.
Electro-magnetic Interference
The detector has been designed and tested to meet all IEC regulations in regard to electro-magnetic (EM)
susceptibility (and EMC).
However, there are no regulations for low frequency EM fields. All flat panel detectors have some suscep-
tibility to these EM fields.
This detector is robust to EM fields up to 0.1mG over a broad low frequency range (DC - 250kHz).
It has been found that some common equipment in clinical environments can generate EM fields well
over 0.1mG. Some measurements have shown 4mG field strengths which can cause artifacts on x-ray
images.
EM fields are reduced by the square of the distance between the EM source and the detector. Thus, mov-
ing the EM source twice as far away will reduce the field strength by 4 times.
General suggestions:
x Keep IV pumps, patient monitoring, feeding pumps 1 meter or more away from any detector surface.
x Consider turning off equipment that cannot be moved.
x Change the patient or detector orientation /position to maximize distance from any equipment.
x Turn on the EMI Reduction feature. See the Preferences chapter for information on how to do this.
Possible sources of EM fields:
x IV pumps
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