Reduction of Radiation Dosage in Visualization of Paranasal Sinuses in Daily Routine

Figure 1

Example of patient examined with both the old (A, group 1) and the new (B, group 2) protocol. Typical images of the anatomical structures are presented to give an impression of the influence of dose reduction (1, os turbinale of inferior turbinate and lamina papyracea; 2, olfactory fossa and anterior ethmoidal artery; 3, posterior ethmoidal artery; 4, optical nerve canal, maxillary neve canal, and vidian nerve canal; 5, infraorbital nerve canal).