PURPOSE: To evaluate the use of 3-dimensional ultrasound C-scan imaging for optic nerve diameter measurements. DESIGN: Prospective observational case series. PARTICIPANTS: Thirty-eight normal eyes of 32 healthy adults. METHODS: Coronal C-scans of 38 normal optic nerves were imaged 3 mm behind the globe. MAIN OUTCOME MEASURES: Optic nerve sheath diameter (ONSD) and optic nerve diameter (OND). RESULTS: Mean ONSD was 4.8 mm (range: 3.9-5.9; SD 0.6), whereas mean optic OND was 1.9 mm (range: 1.8-2.1; SD 0.1). Mean ONSDs were 4.9 mm (male), 4.5 mm (female), 5.0 mm (subjects younger than 50 years), and 4.6 mm (subjects 50 and older). CONCLUSION: Coronal C-scans generated from 3-dimensional ultrasound can be used to measure the optic nerve diameters in adult eyes.
PURPOSE: To evaluate the use of 3-dimensional ultrasound C-scan imaging for optic nerve diameter measurements. DESIGN: Prospective observational case series. PARTICIPANTS: Thirty-eight normal eyes of 32 healthy adults. METHODS: Coronal C-scans of 38 normal optic nerves were imaged 3 mm behind the globe. MAIN OUTCOME MEASURES: Optic nerve sheath diameter (ONSD) and optic nerve diameter (OND). RESULTS: Mean ONSD was 4.8 mm (range: 3.9-5.9; SD 0.6), whereas mean optic OND was 1.9 mm (range: 1.8-2.1; SD 0.1). Mean ONSDs were 4.9 mm (male), 4.5 mm (female), 5.0 mm (subjects younger than 50 years), and 4.6 mm (subjects 50 and older). CONCLUSION: Coronal C-scans generated from 3-dimensional ultrasound can be used to measure the optic nerve diameters in adult eyes.
Authors: Garrett G R J Johnson; Tomislav Jelic; Angela Derksen; Bertram Unger; Frederick A Zeiler; Markus T Ziesmann; Lawrence M Gillman Journal: Front Med (Lausanne) Date: 2022-03-02