Chest X-ray is a modern diagnostic imaging technique to examine and evaluate the entire internal structure of the lungs, helping to detect lung damage and disease. Chest X-ray includes upright chest X-ray and oblique chest X-ray.

Chest X-ray is one of the paraclinical methods used to diagnose most diseases today. There are many positions for taking chest X-rays depending on the purpose of taking X-rays in different pathological cases, however, upright chest X-ray is the most common position for taking chest X-rays and is indicated in most common diseases.

White lung or white lung X-ray image is a phenomenon observed when taking chest X-ray in some patients with respiratory problems, especially the lungs. This phenomenon is also known as white lung disease, which affects the patient's health and needs to be detected and treated promptly.