Chest radiographs in cystic fibrosis. A follow-up study with application of a quantitative system.

A modified Chrispin-Norman score was used to investigate at what age typical X-ray signs of cystic fibrosis (CF) appear and for the follow-up of patient with CF. Scores of patients with chronic obstructive lung disease (COLD) and with innocent heart murmurs were used for comparison. The findings were: 1.