Jenjitranant P, et al. - This imaging study was performed to analyze the relationship between optic nerve sheath diameter (ONSD) measurement with signs of increased intracranial pressure (ICP) found on CT in trauma patients. Researchers conducted a total of 271 consecutive head CT trauma scans at the trauma center, that was reviewed for ONSD and CT findings. It was noted that the mean ONSD on axial CT images, optic-nerve axial plane, and the US was 4.70 ± 0.59 mm, 4.78 ± 0.59 mm, and 3.16 ± 0.50 mm, respectively. A significant relationship was found between ONSD and imaging signs of increased ICP in CT with a high NPV. There was no difference in ONSD measurement at CT between normal and optic-nerve axial planes, whereas a significant difference was found between diameter obtained at CT and US.