Figure 3

Parenchymal changes during early phase reaction in asthma model. (A) Baseline image before methacholine challenge. (B) Image of 5 min after methacholine challenge. (C) Baseline image before OVA challenge. (D) Image of 5 min after OVA challenge. Methacholine challenge did not induce any parenchymal changes nor bronchial changes. However, prominent peribronchial attenuation developed along with dilation of bronchus by OVA challenge.