Value of expiratory CT in the diagnosis of bronchiolitis obliterans

(A) Inspiratory HRCT shows bilateral areas of decreased attenuation and vascularity.

(B) Expiratory HRCT better demonstrates the extensive air trapping consistent with severe airway obstruction.

CT: computed tomography; HRCT: high-resolution computed tomography.

Courtesy of Nestor L Muller, MD, PhD.

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