Because of the number and variety of illnesses that can affect the pediatric respiratory system, being able to interpret thoracic images of children is important for the general radiologist.� This issue of Radiologic Clinics starts off with an overview of lung and pleural infections.� Reviews of small and large airway diseases are followed by separate articles on the uses of ultrasound, MR, and nuclear medicine to image pediatric patients.� Also included are articles on lung and vascular anomalies, thoracic trauma, and cardiac disease.� The issue is completed with articles on fetal lung imaging and radiation safety.