Usually, your doctor can tell if your sinuses are blocked based on your symptoms and a physical exam, but in some cases, you may need CT or MRI scans ... polyps. Allergies can cause sinus ...

Many patients with chronic sinusitis will have nasal exams that are not diagnostic ... can not be adequately diagnosed by plain films. CT scans done coronally without enhancement, and with 3 ...

"You may have imaging studies, such as a CT scan of the sinuses ... linked to the development of polyps When medications fail to ease your symptoms, endoscopic sinus surgery could be the next ...