This chapter discusses radiology and imaging in ENT, where the normal paranasal sinuses (PNS) are airfilled and so appear transradiant on plain films. Occipitomental or Water’s view is the best view for maxillary sinuses, where occipitofrontal or Caldwell view is for frontal, ethmoids, maxillary and sphenoid sinuses. Decubitus Water’s and supine view is used to visualise and confirm fluid level. Bucket handle view is done to visualise the fracture of zygomatic arch. The petrous tip, internal auditory meatus and canal, the bony labyrinth comprising the semicircular canals, vestibule and cochlea, and middle ear cleft are well demonstrated on Stenver’s view. The air-containing cavity of the middle ear is well assessed on axial or submentovertical view. CT scan is an accurate and noninvasive 2-dimensional method in radiology which was used by a British scientist Hounsfield. MRI is an imaging modality which gives cross section images of the body in any plane without exposing the body to ionising radiation.