Chest X-ray (Posterior-Anterior, Lateral Decubitus)

Why This Test Is Done

A chest X-ray may be recommended to check for conditions such as pneumonia, fluid in the lungs (like from heart failure), lung collapse, or other abnormalities. It can also be used to monitor conditions like chronic obstructive pulmonary disease (COPD) or to evaluate symptoms like shortness of breath, chest pain, or persistent coughing.

How the Test Is Performed

You will lie on an X-ray table while the technician positions you for the images. For the lateral decubitus view, you’ll lie on your side. The technician will move the X-ray machine around you to capture images from different angles. You may be asked to hold your breath briefly during the exposure.

What to Expect Before the Test

No special preparation is needed. Wear comfortable clothing and remove any metal objects (like jewelry or belts) that could interfere with the images. If you’re pregnant, inform your healthcare provider, as X-rays can pose risks to fetal development.

What to Expect During the Test

The test usually takes about 10–15 minutes. You’ll feel a slight pressure from the X-ray plate against your chest but no pain. The technician will explain each step and ensure you’re comfortable.