An erect X‑ray is a radiograph taken with the patient standing upright. It shows gravity‑dependent signs like air‑fluid levels in the abdomen, free air under the diaphragm, lung and pleural changes, and heart size. The patient stands against the detector and may hold their breath briefly. It’s especially useful for suspected bowel obstruction or perforation; bedridden patients need supine alternatives.

"Erect view" is a radiology term for an X-ray taken with the patient standing or sitting upright. It’s commonly used for chest and abdominal images because gravity reveals air-fluid levels, free air under the diaphragm, pleural effusions, and changes in lung or heart size that may be less apparent on supine films. Also called an upright view, it aids diagnosis.

The erect position in radiology means the patient is imaged while upright (standing or seated). This view uses gravity to reveal air-fluid levels, improve lung expansion assessment, detect free intraperitoneal air beneath the diaphragm, and evaluate lines or tubes. It’s commonly used for chest and abdominal radiographs and is preferred only when the patient can safely sit or stand.

Position the patient standing upright with the anterior abdomen against the detector for at least 5 minutes to allow free intraperitoneal gas to rise. Remove clothing/metal and apply gonadal shielding. Use an AP erect projection, center the beam midline about 2–5 cm above the iliac crests to include the diaphragm and pelvis. Instruct the patient to hold breath at end-expiration; collimate and expose.

An erect image is one that has the same orientation as the object—upright rather than inverted. Erect images are typically virtual: produced by plane mirrors, convex mirrors, or converging lenses when the object lies within the focal length. They cannot be projected onto a screen because light rays appear to diverge from a point behind the optical device, and they often look magnified.

Erect chest X‑ray is indicated for suspected pneumothorax, pleural effusion (to show air–fluid levels and blunted costophrenic angles), acute respiratory infection or worsening symptoms, suspected heart failure/pulmonary oedema, chest trauma, assessment or confirmation of lines, tubes or devices, preoperative baseline, persistent cough, unexplained chest pain, suspected aspiration or inhaled foreign body.