HRCT of early IPF with minimal honeycombing
HRCT of early IPF with minimal honeycombing

Supine high-resolution CT (HRCT) through the upper lobes in the same patient as shown in previous image. Irregular reticular opacities (arrows) are visible in the lung periphery, but honeycombing and traction bronchiectasis are not present. In IPF, abnormalities in the upper lobes are usually less severe than at the lung bases.