Figure 1From: Expiratory CT scan in patients with normal inspiratory CT scan: a finding of obliterative bronchiolitis and other causes of bronchiolar obstruction34-year-old healthy subject. Inspiratory axial CT scan shows the normal round shape of the trachea (a). Expiratory axial CT scan shows the normal bowing forward of the posterior wall (b). Note the normal homogeneous attenuation increase of the lung parenchyma.Back to article page