Spiral CT can reliably depict central PE and may be introduced into the classic diagnostic algorithms.

Spiral CT with 2-mm collimation at 0.75 second per revolution enables marked improvement in the analysis of segmental and subsegmental pulmonary arteries.

Spiral CT enabled noninvasive detection of unresolved PE and of newly developed chronic PE.

Sliding-thin-slab MIP helps detect mild forms of micronodular infiltration and should be considered a valuable additional tool in the evaluation of diffuse infiltrative lung diseases.

Chronic pulmonary embolism may lead to ipsilateral proximal bronchial dilatation.