Paranasal sinuses (PNS) usually consist of four paired air-filled spaces. The most important function of PNS is to reduce the weight of the head. Other functions of PNS are aiding in voice resonance and air humidification. A paranasal sinus water view x-ray is an imaging test which uses a small amount of radiation through the chin at an angle and is specially used to obtain diagnostic information about the bony structures of the front of the head and especially regarding frontal sinuses and maxillary sinuses. A PNS sinus x-ray helps the doctors in detecting problem related to the sinuses. It is a non-invasive test with little discomfort or pain and can be completed quickly.