Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Posteroanterior
Medically reviewed by Min Clinic Staff | Updated: January 2026
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".