Neuroradiology

Tumour in cerebellopontine angle. [Courtesy of Dr. W. Montanera]

Axial CT with contrast showing a ring enhancing lesion over the left thalamic region with central necrosis. [Courtesy of Dr. J. Spears]

T1-weighted coronal MRI with contrast. A large tumour is highlighted in the right posterior fossa and bilateral dilatation of the lateral ventricles is evident (likely secondary to compression of the 4th ventricle or Sylvian aqueduct). [Courtesy of Dr. J. Spears]

[Courtesy of Dr. W. Montanera]

Multiple views of post-contrast CT image of a pituitary adenoma. The saggital view demonstrates the transphenoidal approach for surgery. [Courtesy of Dr. J. Spears]

Post-contrast CT with multiple views showing a ring enhancing lesion with OTS reconstruction for surgery. [Courtesy of Dr. J. Spears]

Post-contrast CT with multiple views displaying a large olfactory meningioma expanding around the internal carotids and as far as the clivus. Note the mass effect displacing the corpus callosum superiorly and posteriorly and erosion of the anterior fossa floor. [Courtesy of Dr. J. Spears]

Well-demarcated, homogeneous, extra-axial lesion.
a) CT
b) T1 weighted MRI (note that the tumour is isointense to the gray matter)
c) T1 weighted MRI post contrast.
[Courtesy of Dr. W. Montanera]

Post-contrast axial CT image showing a lung metastasis in the right hemisphere adjacent to the falx with surrouding edema and effacement of the sulci in the right hemisphere secondary to the mass effect. [Courtesy of Dr. J. Spears]

Large gliooma with midline shift and compression of sulci. [Courtesy of Dr. G. Olscamp]