RT Journal Article SR Electronic T1 Simple method of estimating severity of pulmonary fibrosis on a numerical scale. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 467 OP 470 DO 10.1136/jcp.41.4.467 VO 41 IS 4 A1 T Ashcroft A1 J M Simpson A1 V Timbrell YR 1988 UL http://jcp.bmj.com/content/41/4/467.abstract AB A continuous numerical scale for determining the degree of fibrosis in lung specimens was devised for correlation with other pulmonary variables such as lung function tests or mineral burden. Grading was scored on a scale from 0 to 8, using the average of microscope field scores. The system allows fibrosis to be measured in small samples of tissue (1 cm) which can provide a detailed description of the changes in a lung, currently not possible with most existing methods.