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Definition of Posteroanterior

Posteroanterior: From back to front. A chest x-ray taken with the chest against the film plate and the x-ray machine behind the patient is a posteroanterior (PA) view. As opposed to anteroposterior (AP).

For a more complete listing of terms used in medicine for spatial orientation, please see the entry to "Anatomic Orientation Terms".

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=9278
Last Editorial Review: 8/28/2013

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