Imaging in chronic rhinosinusitis: A systematic review of MRI and CT diagnostic accuracy and reliability in severity staging

•CT is the most commonly used imaging technique for the severity staging of CRS•This review included 21 studies concerned with CT and/or MRI imaging in CRS diagnostic accuracy and/or severity staging•MRI may be a complementary staging tool when repeated examinations are required•MRI may be utilized as a staging tool, using the same staging systems as with CT