Chapter 3: Pediatrics and small patients
5495975-1EN Rev.9 3-3
© 2013-2017 General Electric Company. All rights reserved.
Guidelines for Adjusting Individual Exposure Parameters
by patient
Adjust Parameters: The single most important thing you can do is to always use pediatric protocols to
avoid over exposure. Protocols based on patient size are installed on the system. There are six patient
sizes available: Adult and Pediatric; Small, Medium and Large Patient Size. These protocols should be
considered a baseline. GE strongly recommends that you work with your Radiologist and Physicist to
determine the lowest possible dose for the desired image quality.
Figure 3-1 Patient Size
Once patient size is selected, further adjustments to kVp, MAS, Filtration and Grid can be made to further
minimize patient dose.
Automatic - Exposure or Fixed Exposure: Consideration should be made when utilizing Automatic
Exposure (AEC) or Fixed Exposure. Each protocol on your system has been installed with a preset method
of exposure; however, GE recommends reviewing each protocol and utilizing the method that will allow
for the lowest possible dose.
Use of ion chambers for AEC require careful positioning of patient and should be considered prior to
making an exposure. GE recommends that each facility work with your Radiologist and Physicist. Refer to
Image Acquisition Chapter located in this operator manual for more information on AEC chambers and
sensing areas.
Figure 3-2 Ion Chamber
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