The use of CT scan imaging is beneficial for the performance of certain endoscopic sinus procedures. Referred to as FESS, or functional endoscopic sinus surgery, these procedures are done with the goal of restoring normal physiology to the sinus drainage pathways through the removal or correction of key pieces of tissue. Endoscopic sinus procedures are a significant advancement compared to open sinus surgery. During these procedures, the doctor uses endoscopes, which are very narrow telescopes with cameras and tiny instruments attached. The endoscopes are inserted through the nose without the need for incisions to access the sinuses.
Functional endoscopic sinus surgery offers several advantages over open sinus surgery aside from being minimally invasive. Using endoscopic imaging alone, the doctor can better visualize the nasal passages and sinus cavities. There are no visible scars incurred during endoscopic procedures and very little chance of needing nasal packing after surgery. Studies suggest that post-operative healing also occurs more quickly for patients who receive endoscopic treatment as opposed to open sinus surgery.