© 2005 BMJ Publishing Group Ltd
LETTER
3D ultrasound coronal C-scan imaging for optic nerve sheath meningioma
1 The New York Eye and Ear Infirmary, New York, USA
2 Beth Israel Medical Center, New York, USA
3 New York University School of Medicine, New York, USA
4 New York Medical College, New York, USA
5 The New York Eye Cancer Center, NY, USA
Correspondence to:
Correspondence to:
Paul T Finger
The New York Eye Cancer Center,115 East 61st Street, New York City, NY 10021, USA; pfinger@eyecancer.com
Accepted 25 July 2004
Keywords: optic nerve meningioma; ultrasound; computed tomography; coronal scan; three dimensional ultrasonography
| The first 150 words of the full text of this article appear below. |
The use of three dimensional (3D) ultrasonography (3DUS) for optic nerve measurements has been described in normal eyes utilising coronal "C-scans."1,2 This study demonstrates the use of 3DUS generated C-scans for optic nerve measurements in orbits with optic nerve sheath meningioma and compares those with measurements obtained from computed tomography (CT) scans.
A 69 year old woman with a left optic nerve sheath meningioma was treated with external beam radiation therapy 6 years earlier. On 3DUS coronal C-scans, an optic nerve sheath diameter (ONSD) 3 mm behind the globe was measured to be 7.4 mm in the left eye (fig 1
, top left) and 6.4 mm in the right (fig 1, top right).
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Figure 1 Case 1. The patient’s left (top left) and right (top right) optic nerve sheath diameters are shown by 3DUS coronal C-scans. The patient’s left (bottom left) and right (bottom right) optic nerve sheath diameters are | |||||||||
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