[Diagnosis of tracheal instability: spiral CT in inspiratory and expiratory and respiratory cine CT].

Purpose: In tracheo- and bronchomalacia, localization and determination of collapse is necessary for planning a surgical procedure. We compared inspiratory and spiral CT, cine CT, and bronchoscopy and evaluated the relevance of each method.

Methods: Seventeen patients with suspected or verified tracheal stenosis or collapse underwent paired inspiratory and expiratory spiral CT and cine CT during continuous respiration (temporal increment 100 ms).