A 3-dimensional ultrasound C-scan imaging technique for optic nerve measurements.
OBJECTIVE
To evaluate the use of 3-dimensional ultrasound C-scan imaging for optic nerve diameter measurements.


METHODS
Prospective observational case series.


METHODS
Thirty-eight normal eyes of 32 healthy adults.


METHODS
Coronal C-scans of 38 normal optic nerves were imaged 3 mm behind the globe.


METHODS
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).


CONCLUSIONS
Coronal C-scans generated from 3-dimensional ultrasound can be used to measure the optic nerve diameters in adult eyes.
Garcia
Julian P S
JP
The New York Eye & Ear Infirmary, New York, New York, USA.
Garcia
Patricia T
PT
Rosen
Richard B
RB
Finger
Paul T
PT
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009900:Optic Nerve / Q000000981:diagnostic imaging*; D011446:Prospective Studies; D014463:Ultrasonography