Chest CT

A chest CT provides detailed images of the lungs, airways, heart, and chest cavity. It is more sensitive than a chest X-ray for many conditions.

Common indications

A chest CT is often requested to evaluate lung nodules, suspected lung cancer, pneumonia that does not improve, or suspected pulmonary embolism. It also helps assess lymph nodes in the chest.

After chest injury, CT can detect pneumothorax, bleeding, or rib fractures that are not visible on X-ray.

Contrast and exam types

A chest CT can be performed without contrast or with intravenous contrast. To examine the pulmonary arteries, a CT pulmonary angiogram (CTPA) is used. For small nodules, high-resolution CT with very thin slices is often used.

The choice of exam depends on the clinical question the doctor needs answered.

Things to keep in mind

Lung nodules found incidentally are often benign, but they still need follow-up according to current guidelines. The doctor will explain next steps based on size and characteristics.

This exam delivers a higher radiation dose than a chest X-ray, so the indication should be considered with your doctor.

Key points

• Used for lung nodules and suspected pulmonary embolism.
• More sensitive than a chest X-ray.

Educational information, not a substitute for medical advice.