II. Indication (Sinus CT preferred)
- Evaluation of Suspected Chronic Sinusitis
- Evaluation of Acute Sinusitis:
- Persistent symptoms despite adequate treatment
- High risk patients
- Suspected involvement in multiple Paranasal Sinuses
III. Contraindications (Relative)
- Ethmoid or Sphenoid Sinusitis
- Age under 3 years
- Undeveloped sinuses
- High False Positive opacification rate
IV. Views
-
Maxillary: Waters' View (Occipitomental XRay)
- This alone is usually sufficient
- Frontal: Caldwell-Luc
V. Findings suggestive of Sinusitis
- Opacification (Only 36-66% sensitive)
- Air fluid levels
- Mucosa more than 8 mm thick (non-specific)
VI. Efficacy in Acute Sinusitis
- Test Sensitivity: 76%
- Test Specificity: 79%