A 3-dimensional ultrasound C-scan imaging technique for optic nerve measurements.
case_series · Level IV
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Abstract
To evaluate the use of 3-dimensional ultrasound C-scan imaging for optic nerve diameter measurements. Prospective observational case series. Thirty-eight normal eyes of 32 healthy adults. Coronal C-scans of 38 normal optic nerves were imaged 3 mm behind the globe. Optic nerve sheath diameter (ONSD) and optic nerve diameter (OND). 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). Coronal C-scans generated from 3-dimensional ultrasound can be used to measure the optic nerve diameters in adult eyes.
Medical subject headings
- Diagnostic Techniques, Ophthalmological
- Imaging, Three-Dimensional
- Optic Nerve