Appendix D Lexicon
1 Lexicon
For the CT technologist who operates multiple scanner models, perhaps from multiple
manufacturers, the variability in names for important scan acquisition and reconstruction
parameters can lead to confusion, reduced comfort and an increased potential for error. The
intent of this CT terminology lexicon is to allow users to translate important CT acquisition and
reconstruction terms between different manufacturers' systems.
The following tables provide the SABMI (Scout Adjusted Body Mass Index) terminology for GE
and is a result of the AAPM CT Terminology working group. It identifies relevant from
established lexicon (e.g., Radlex and DICOM) and other relevant literature published.
The AAPM website will provide updates when changes in standardization of terminology occur.
Visit www.aapm.org, search CT Protocols, and select Lexicon for full listing of terminology
across various manufactures of CT equipment.
The generic descriptions or terms in the first column are intended to orient the user to the
relevant concepts; they are not consensus "preferred terms." The generic descriptions are not
based on any single existing or pending terminology standard; however the references cited
below were consulted in developing the generic descriptions.
A number of individuals and groups have advocated for terminology standardization in CT,
including at a March 30-31, 2010 FDA (Food and Drug Administration) public meeting entitled
"Device Improvements to Reduce Unnecessary Radiation Exposure from Medical Imaging"
(transcripts available at the FDA website: www.fda.gov in Medical Devices). Participants
proposed a cooperative effort among professional organizations (AAPM, ASRT, ACR, etc.),
industry, and the FDA.
Scan acquisition and user interface basics
Dose modulation and reduction tools
Image reconstruction and display
Multi-planar formats and 3D processing
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
Appendix D Lexicon
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