<prompt> Waters view is best used for visualization of:Frontal sinusMaxillary sinusEthmoid sinusSphenoid sinus  <response>: Ref. Textbook of Ear, Nose and Throat Diseases Pg 155 Laws view 15o lateral oblique: Sagittal plane of the skull is parallel to the film and X-ray beam is projected 15 degrees cephalocaudalWater view Best to visualize maxillary sinusThe Caldwell view is a caudally angled PA radiograph of the skull, designed to better visualise the paranasal sinuses, especially the frontal sinusSchullers or Rugnstrom view 30o lateral oblique: Similar to Laws view but cephalocaudal beam makes an angle of 30 degrees instead of 15 degrees 