AJR 2000; 175:1537-1543
Arakawa Hiroaki, Niimi Hiroshi, Kurihara Yasuyuki, Nakajima Yasuo, Webb W. Richard.
Expiratory high-resolution CT is a powerful adjunct to inspiratory high-resolution CT in the diagnosis of diffuse lung disease. This technique reveals dynamic changes in lung attenuation related to the interplay among the amount of air in the alveoli, the pulmonary interstitium, and the pulmonary blood volume. It is particularly sensitive for the detection of small airways obstruction. Combining both inspiratory and expiratory high-resolution CT, we can better understand the mechanisms of inhomogeneous lung attenuation and more accurately diagnose diffuse lung diseases.