Question
Radiological view shown in Photograph of X-ray skull
A. Water’s view.
B. Basal view.
C. Lateral view.
D. Caldwell’s view.
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Correct Answer » A Explanation |
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Ans: A. Water’s View.
Waters’ view
- Also known as the Occipitomental view.
- It is a radiographic view, where an X-ray beam is angled at 45° to the orbitomeatal line.
- The rays pass from behind the head and are perpendicular to the radiographic plate. It is commonly used to get a better view of the maxillary sinuses.
Structures observed
- Maxillary sinuses
- Frontal sinuses (oblique view)
- Ethmoidal cells
- Sphenoid sinus (through open mouth)
- Odontoid process (if it is just below the mentum, it confirms adequate extension of the head).
Possible observations
Normal
- Odontoid process lies exactly below mentum.
- Maxillary sinuses are more radiolucent than orbits.
Maxillary sinusitis
- Maxillary sinus shows radiopacity.
- Mucous membrane shows thickening.
- Air-fluid level may be observed .The concavity of fluid opacity points upwards.
Polyp
- Maxillary sinus shows radiopacity with convexity pointing upward.
Malignancy Maxillary Sinus
- Onhgren’s line
- Sinus is radioopaque.
- Sometimes, destruction of walls of sinus is seen and is diagnostic of malignancy
