Computed Tomography and Magnetic Resonance Imaging for the Veterinary Ophthalmology Patient

Introduction<br/>Computed tomography (CT) is booming in small animal practice, due to its versatility and speed. In many veterinary practices, it is the only advanced imaging modality available. Magnetic resonance imaging (MRI) is the imaging modality of choice for central nervous system, but MRI is more limited in availability, versatility and is more time consuming. This presentation will discuss the potential applications of CT and MRI for the ophthalmological patient and the principles of both imaging modalities.<br/>Potential CT and MRI applications<br/>In ophthalmogical patients, diagnostic imaging is usually applied to investigate potential disease processes in the eye posterior to the lens or structures behind, beside or in front of the globe. Common imaging applications include:<br/>• Exophthalmos<br/>• Orbital trauma<br/>• Central blindness<br/>• Cranial nerve deficits <br/>• Lacrimal duct abnormalities<br/>• Periorbital fistula / swelling<br/>• Suspected nasal / brain disorder<br/>Imaging modalities include radiography, ultrasound, CT and MRI. A typical imaging workflow could be depicted as this:<br/>