Fig. 2
From: Ventilatory support and mechanical properties of the fibrotic lung acting as a “squishy ball”
a Histological evidence of spatial heterogeneity with relatively spared alveolar spaces surrounded by patchy areas of fibrosis with multiple fibroblastic foci in a patient with IPF. b CT appearance of UIP pattern in a patient with IPF. c Graphical appearance of a “squishy ball” depicting the elastic features of fibrotic lung in resting position. d Squishy ball subjected to the application of an internal pressure: the increase of the pressure inside the object causes throttling of the elastic part of the body through the inelastic net that wraps the ball determining a mechanical disadvantage during the expansion