Table 4: Development of X-ray absorption values (HU) in the lung parenchyma of 15 vital calves comparing first and sixth hours of life.

Lung sectionMeasuring time (h) ± MinimumMaximum

A 160−57082−718−389
(dorsocranial)660−65947−753−551
C1135−48858−607−328
(dorsocaudal)6135−60067−716−367
B160−304149−567−56
(ventrocranial)660−417133−631−16
D1131−276111−478−556
(ventrocaudal)6134−407102−593−83