Sensitivity and Specifity of Plain X-Ray in Diagnosis of Acute Sinusitis

ABSTRACT With considering of high prevalence of sinusitis and variable imaging modalities in diagnosis of it, we decided to evaluate sensitivity and specifity of plain x-ray in diagnosis of acute sinusitis. In this researeh , CTscan and plain x-ray findings of 83 patients with suspected acute sinusitis (by otorhinolayrngologist) - with considering of ethical and economic notices - were compared and descriptive studies were done . CTscan is considered as gold standadrd . Sensitivity and specifity of plain x-ray (waters and caldwell views) in diagnosis of acute sinusitis for paranasal sinuses Were maxillary (0.85 - 0.85), sphenoid (0.55 - 0.95), ethmoid (0.79 - 0.94), and frontal (0.86 - 0.93) sinuses and positive predictive value and negative predictive value were : maxillary (0.83 - 0.87), sphenoid (0.73 - 0.89), ethmoid (0.87 - 0.90), and frontal (0.83 - 0.94) respectirly. Waters and caldwell views are accurate methods in primary investigation and also in follow up of patients with acute sinusitis without complication.