With the exception of the preoperative navigation protocol, all slices were reconstructed with a 20% to 30% slice overlap. Images were reconstructed with high-resolution convolution kernels: H70s (Sensation 64), FC81 (Aquilion 32), and H60s (Volume Zoom 4). The acquisition matrix was 512 × 512 for all examinations.
Typically a field of view of 200 × 200 mm was chosen with a range from 150 × 150 mm for paranasal sinus imaging to 250 × 250 mm for preoperative navigation. The scan range for paranasal sinus imaging included the space from the frontal sinus to the hard palate, for preoperative navigation from the top of the calvarium to the angle of the mandible, and for trauma imaging from the top of calvarium to the hard palate or the mandible.
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