Thoracic ultrasound assesses the chest wall, pleural space, diaphragm, and accessible lung parenchyma for a range of cardiopulmonary conditions. While X-ray and CT remain primary thoracic modalities, ultrasound provides real-time, portable, radiation-free assessment at the bedside — making it invaluable in the ICU, emergency department, and procedural setting.
Sonographers and clinicians assess pleural sliding (to exclude pneumothorax), identify and quantify pleural effusion, characterize pleural and subpleural consolidations, and guide thoracentesis. Lung point — the transition between pneumothorax and normal aerated lung — is a specific ultrasound sign. Diaphragm motion assessment during breathing evaluates phrenic nerve function and weaning readiness in ventilated patients.
Thoracic ultrasound competency is increasingly incorporated into RDMS training and emergency/critical care sonography curricula. Sonographers working in thoracic imaging or critical care settings benefit from competency in the 12-zone lung scanning protocol and familiarity with bedside procedural guidance. The Society of Critical Care Medicine (SCCM) and other organizations publish training standards for this subspecialty.