Aquilion one dynamic volume ct

Both facial and brain CT examinations were performed using a 320-slice multidetector CT scanner (Aquilion ONE Dynamic Volume CT, Toshiba Medical Systems Corporation, Otawara, Japan). Facial CT scans were reconstructed three-dimensionally (axial, sagittal, and coronal dimensions) with a series of 3-mm-thick slices parallel to the hard palate and reaching the superior border of the orbit.
All images were retrospectively and independently evaluated by two board-certified EPs who were not involved in patient selection and who were blinded to patients’ final diagnoses and outcomes. ONST was measured at a distance of 3 mm, posterior to the eyeball, immediately below the sclera of the patients’ left and right eyes using sagittal planes from the reconstructed sagittal plane facial CT images obtained through PACS in stack mode (Fig. 2A). ONSD was measured in the same manner but using axial plane facial CT images, also in stack mode (Fig. 2B). ONST and ONSD were measured twice by each reviewer. Window parameters included the following: window width, 60; window length, 360; and accuracy, 1 pixel with 200% enlarged plane. All measurements were made using the same window, contrast, and brightness.