The difference between Chest Posterior Anterior (PA) and Anterior Posterior (AP) radiographs.
1. The difference between Chest Posterior Anterior (PA) and Anterior Posterior (AP) radiographs
Erect PA projections are considered the ‘gold standard’ for chest projection imaging (CXR). In some instances, it will not be possible to acquire an erect PA or even an erect AP image and the radiographer / Radiological Technologist will need to opt for a semi-erect or supine image. Research has shown you may also be asked to undertake mobile chest radiography with the patient in the prone position. Projection Chest radiographs are often abbreviated to CXR or chest film (It’s not a film but clinicians still call it a film). It is essential that the correct anatomical and positional markers are included on the image. Any modifications from the standard projection should be noted on the image (See figure 1).