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. 2013 Sep 11;8(9):e74991. doi: 10.1371/journal.pone.0074991

Figure 1. Definition of regions of interest (ROI’s) in anterior gamma camera images.

Figure 1

Superposition of the anterior gamma camera image with a representative coronal CT slice of a CRS patient before FESS and definition of the total nasal, central nasal and sinus ROI’s.