What is the role of CT scanning in the workup of third cranial nerve palsy (oculomotor cranial nerve palsy)?

Updated: Oct 08, 2018
  • Author: James Goodwin, MD; Chief Editor: Andrew G Lee, MD  more...
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CT scan is more sensitive than MRI to demonstrate subarachnoid hemorrhage.

CT scan is also better than MRI for demonstrating calcification within lesions, as may be found in certain tumors and in large aneurysms.

Sixteen-row multislice CT angiography rivals digital subtraction catheter angiography in sensitivity and specificity for detecting intracranial aneurysms. [27, 28]

CTA is faster than MRI/MRA and, in many centers, is superior to MRI/MRA for aneurysm.

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