Introduction to thoracic imaging

The diagnosis of many respiratory problems can be clarified using spirometry and chest X-ray; if lung pathology is suspected, a chest X-ray should be performed initially before requesting other imaging. If further imaging (eg computed tomography [CT]) is required, specialist referral should be considered.

Note: If lung pathology is suspected, a chest X-ray should be performed initially before requesting other imaging.

This topic focuses on sound decision making when choosing imaging investigations. The choice of investigation is dictated by the clinical question. The clinical question or indication for the investigation should be clearly described on the imaging request form.

Note: The clinical question or indication for the investigation should be clearly described on the imaging request form.

Imaging investigations have specific diagnostic capabilities and potential risks (eg exposure to contrast media or ionising radiation). The benefit of increased diagnostic certainty should be weighed against potential risks. If there is any uncertainty about the best investigation in a specific patient (eg patient with existing lung disease), consult the radiologist.

Children are more sensitive to ionising radiation; if a CT scan is considered in a child, consult with a paediatric specialist.

Note: If a CT scan is considered in a child, consult with a paediatric specialist.