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Figure 1: Sagittal CT sections as seen on ImageJ 1.x software demonstrating the coordinates of the (a) lowest point of the olfactory fossa (arrow), (b) the sphenoid ostium (arrow), and (c) the “skull base–choana” distance from the lowest point of the olfactory fossa to the highest point of the floor of the choana (hard palate)

Figure 1: Sagittal CT sections as seen on ImageJ 1.x software demonstrating the coordinates of the (a) lowest point of the olfactory fossa (arrow), (b) the sphenoid ostium (arrow), and (c) the “skull base–choana” distance from the lowest point of the olfactory fossa to the highest point of the floor of the choana (hard palate)