The AP (anteroposterior) view is an X‑ray projection where the beam passes from the front (anterior) to the back (posterior) of the body. The patient’s front faces the X‑ray tube—commonly used when supine or unable to stand. AP films can magnify the heart and mediastinum compared with PA views, so positioning must be considered when interpreting results.

An X‑ray of the left hand can show bone fractures, dislocations and joint alignment, signs of arthritis or joint‑space narrowing, bone infections or tumors, growth‑plate injuries in children, and calcifications or foreign bodies. It can reveal bone‑density changes and degenerative or congenital abnormalities, and may indicate soft‑tissue swelling; however, subtle soft‑tissue injuries often require additional imaging.

AP (anteroposterior) hand position: patient sits with forearm on the table, palm down and hand flat on the image receptor. Fingers are fully extended and slightly separated; long axis of the hand is parallel to the receptor. Elbow is flexed about 90°. Center the x‑ray beam perpendicular to the third metacarpophalangeal joint. Include a side marker and immobilize to avoid motion.

Standard hand X-ray views are posteroanterior (PA), oblique, and lateral. The PA view demonstrates bone anatomy and joint spaces with minimal magnification. The oblique view better reveals metacarpal and phalangeal fractures and joint alignment. The lateral view assesses dorsal/volar displacement and overall hand alignment. Targeted scaphoid or additional views may be added for suspected carpal or occult fractures.

To obtain an AP (anterior–posterior) radiographic view: position the patient so the X‑ray tube faces the anterior surface and the image receptor/detector lies posterior to the body. Center the central ray perpendicular to the receptor at the anatomical level of interest, maintain appropriate tube‑to‑image distance, immobilize the area, remove clothing/metal, and use shielding. For chest AP, instruct full inspiration and roll shoulders forward.

AP (anteroposterior) and lateral are two standard radiographic views. AP is a frontal projection with X‑rays traveling front-to-back; lateral is a side projection perpendicular to AP. Together they provide orthogonal perspectives that improve localization and characterization of fractures, alignment, masses, or fluid in the chest, spine, or joints, increasing diagnostic accuracy.