Fig. 4From: Mean value of B-mode optic nerve sheath diameter as an indicator of increased intracranial pressure: a systematic review and meta-analysisOptic nerve sheath diameter (ONSD) measured by ultrasound (US) stratified by the diagnostic method of increased intracranial pressure (ICP). MRI magnetic resonance imaging, CT computed tomography, LP lumbar puncture, Inv invasive intracranial monitoringBack to article page