Axial NECT images from a female patient who presented with a headache 6 hours post partum demonstrate air outlining the anterior horns of the lateral ventricles. The patient received epidural anesthesia during labor which is the most likely cause of this imaging appearance.
Zak IT, Dulai HS, Kish KK. Imaging of neurologic disorders associated with pregnancy and the post partum period. Radiographics 2007;27:95-108.