The PA (posteroanterior) view is a chest X‑ray taken with the patient standing facing the image detector so X‑rays pass from back (posterior) to front (anterior). It minimizes heart magnification and provides clearer lung and mediastinal detail, making it the standard upright projection for routine assessment of lungs, heart size, and other thoracic structures.

A standard hand X‑ray is taken in the posteroanterior (PA) view: the patient places the palm flat on the detector with fingers slightly spread and extended. This reduces magnification and shows joint spaces and bone alignment. Additional oblique and lateral views are often obtained to assess fractures, dislocations, or scaphoid injuries. Sometimes an AP view is used for small children.

For a PA (posteroanterior) hand radiograph, center the central ray perpendicular to the third metacarpophalangeal (MCP) joint. Have the patient pronate the hand with the palmar surface flat on the image receptor, fingers extended and slightly separated, wrist and forearm aligned. Collimate to include distal phalanges through the proximal forearm (about 1 inch of distal radius/ulna).

Standard hand radiography usually includes three views—posteroanterior (PA), oblique and lateral—to evaluate bone integrity, joint spaces and alignment. Additional targeted projections (for example scaphoid, ball‑catcher or stress views) may be added for suspected occult fractures, arthritis or complex trauma. The final series depends on clinical indication, patient condition and radiologist or clinician preference.

A PA (posteroanterior) X-ray is a chest radiograph taken with the patient standing, chest against the image detector and the X-ray beam passing from back to front. This standard upright view reduces heart magnification, improves lung detail, and better shows the mediastinum. It’s commonly used for routine chest assessment and is performed during full inspiration to maximize lung expansion.

AP (anteroposterior) vs PA (posteroanterior) hand X‑ray: PA is standard—palm flat on the detector, X‑rays enter the dorsum (back) and exit the palm, giving less magnification and clearer joint spaces. AP is done with the palm facing the tube (palm up), increasing object‑to‑image distance, causing magnification and altered joint/shaft appearance; used when pronation isn’t possible (trauma, children).