Chest radiograph shows irregular opacities in lower lung fields that may be categorized as 0/1 or approaching 1/0 according to the ILO classification. Note pleural changes.
The International Labor Organization (ILO) classification defines chest radiographs that are suggestive but not presumptively diagnostic as 0/1 and those that are presumptively diagnostic but not unequivocal as 1/0.
Am J Respir Crit Care Med vol 170 pp 692, 2004; www.atsjournals.org