Posteroanterior/Anteroposterior Simultaneous Radiotherapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** A type of radiation procedure in which radiation is applied simultaneously in the anteroposterior anatomical plane and in the posteroanterior anatomical plane.

**Synonyms:** - AP-PA Simultaneous - AP-PA Simultaneous - AP/PA SIMULTANEOUS - APPA Simultaneous - APPA Simultaneous - AnteriorPosterior-PosteriorAnterior Simultaneous - AnteriorPosterior-PosteriorAnterior Simultaneous - Anteroposterior-Posteroanterior Simultaneous - Anteroposterior-Posteroanterior Simultaneous