Accuracy of High Resolution CT in Assessing Idiopathic Pulmonary Fibrosis Histology by Objective Morphometric Index1 1 Presented as poster discussion at the 1997 American Thoracic Society International Conference, May 1621, San Francisco, California Financial support by the following Brazilian agencies: FAPESP, CNPq, CAPES and Lim05-HCFMUSP.