"You may have imaging studies, such as a CT scan of the sinuses." A nasal endoscopy might also be performed, where a doctor uses a tiny camera to inspect the nasal cavity and sinuses. If evidence ...

The problem: It's sometimes unclear whether lingering congestion stems from allergies or a sinus infection. To determine the cause, some doctors order CT scans. But a simple nasal smear is usually ...

A significant number of patients with chronic sinusitis, especially involving ethmoid or sphenoid cells, can not be adequately diagnosed by plain films. CT scans done coronally without enhancement ...