In the paper by Jaffe et al, the authors describe the CT findings of 31 patients with thoracic empyema who had three investigations (chest radiography, CT scan and ultrasound scan).1 They correctly conclude that routine CT scanning has no role for children with empyema treated with uro-kinase and percutaneous chest drainage. It is interesting to note that CT scanning is becoming popular as nearly half the subjects had a chest CT scan on referral. They …