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A key concept in understanding answer choices in AIM Template Builder is the difference between pre-coordinated and post-coordinated terms.
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A pre-coordinated term has a single code associated with it. A term may consist of one or more words. A well-defined collection of words represents a concept or thing. |
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For example, RadLex assigns the code RID1276 to the term left upper lobe bronchus. |
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For example, left and lung are preexisting terms. Concatenated, they become left lung, to which the National Cancer Thesaurus assigns it two codes, C25229 and C12468. |