Chest X-ray
A chest X-ray is a quick, painless scan that uses a small dose of radiation to take a picture of the lungs, heart and chest wall. It is one of the most common imaging tests.
Causes & risk factors
- To check for chest infections such as pneumonia
- To investigate a cough, breathlessness or chest pain
- To look at the heart size and outline
- To check for fluid or air around the lungs
- To look for lung problems or masses
- To check the position of tubes or devices
Common symptoms
Tests & diagnosis
- How X-rays work
- CT scan of the chest for more detail
- Chest ultrasound for fluid
Treatment & management
- It is quick and painless — you stand against a plate and hold your breath
- You may be asked to remove clothing and jewellery from the chest
- It shows the lungs, heart outline, ribs and major airways
- The radiation dose is very low
- Tell staff if you are or might be pregnant
When to see a doctor urgently
- When you have a persistent cough, breathlessness or chest pain
- To investigate a suspected chest infection
- When your doctor wants to check your heart or lungs
Not a diagnosis. MedDroid gives general educational information about chest x-ray. It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Is a chest X-ray safe?
Yes. It uses a very small dose of radiation — roughly what you would get from a few days of normal background radiation. The benefit of the information usually far outweighs this tiny risk.
Do I need to prepare for a chest X-ray?
No special preparation is needed. You will be asked to remove clothing and jewellery from the chest area and to hold your breath briefly while the picture is taken.
Explore more
MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.