Lung ultrasound is a point-of-care imaging technique used to assess respiratory conditions at the bedside. It helps identify findings such as pneumonia, pulmonary edema, pleural effusion, and pneumothorax with greater sensitivity than chest X-ray.

A 24-year-old man presents to a primary care clinic with seven days of respiratory symptoms. He initially developed cough, fever, sore throat, and fatigue. His symptoms improved on days 4 and 5, but then worsened in the past 48 hours with recurrent fever and productive green sputum.