Introduction to Imaging of the Orbits
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Hi, my name is Dave Yousem and I'm a professor of
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radiology at the Johns Hopkins Medical Institution.
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And today, I'm going to talk to you about orbital imaging.
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The most common indications for orbital imaging
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with respect to using CT scan
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are for trauma and sinusitis
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to look for orbital complications of sinusitis.
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With respect to MR,
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we are usually evaluating the patient for visual loss,
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in which case we will be imaging both the orbit
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as well as the brain.
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In addition to CT and MR,
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ultrasound is also used for visualization of the
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orbit and this is usually utilized by the
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ophthalmologists for ocular pathology, as well
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as retrobulbar pathology behind the globe.
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The reason why I'm so enthusiastic about imaging
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of the orbit is because it has great anatomy as
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well as a wealth of pathology.
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And one way of organizing your thoughts with
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regard to the pathology,
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is using a mnemonic that was
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taught to me by Stan Siegelman,
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my former residency program director.
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And that mnemonic is vitamin C and D,
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and this stands for Vascular, Infectious,
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Traumatic, Acquired, Metabolic, Idiopathic,
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Neoplastic, Congenital, and Drugs.
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So, when you're stuck with a lesion in the orbit,
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you might want to think about vitamin C and D.
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
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