Fig. 1From: Diagnostic accuracy of internal jugular vein ultrasound in quantification of the central venous pressure for hemodialysis patientsa, b photographic images for demonstration of the patient position and the measurement level for the collapsing IJV point used in method 1. c A photographic image for the patient's position used in method 2. d A photographic image for the patient position and the measurement level using the IJV catheter (CVPi) as a gold standardBack to article page