MAGNETIC RESONANCE IMAGING OF THE CANINE OPTIC NERVE |
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| Authors: | SUSANNE A. E. B. BOROFFKA CHRISTIANE GÖRIG EDUARDO AURIEMMA MAARTJE H. A. C. PASSON‐VASTENBURG GEORGE VOORHOUT PAUL Y. BARTHEZ |
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| Affiliation: | 1. Division of Diagnostic Imaging, Utrecht University and Private Practice, Culemborg, the Netherlands,;2. Division of Ophthalmology, Utrecht University and Private Practice, Culemborg, the Netherlands;3. Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University and Private Practice, Culemborg, the Netherlands |
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| Abstract: | We describe the magnetic resonance (MR) imaging aspects of normal canine optic nerve, the diameter of the optic nerve as measured on MR images, and optimal MR sequences for the evaluation of the optic nerve using a 0.2 T MR unit. Three millimeter contiguous slides of the normal canine orbital region were acquired in transverse and dorsal oblique planes using a variety of tissue weighting sequences. It was apparent that detailed anatomic assessment of the optic nerve can be performed with low‐field MR imaging, but none of the sequences provided unequivocal superior image quality of the optic nerve. The mean diameter of the optic nerve sheath complex was 3.7 mm and of the optic nerve 1.7 mm. The intraorbital and intracanalicular parts of the optic nerve are consistently visible and differentiation between the optic nerve and optic nerve sheath complex is possible using low‐field MR systems. |
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| Keywords: | Fat‐suppression technique gradient echo sequence low‐field MRI optic nerve |
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