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Radiology on-call cases:

Left vertebral artery occlusion

CT angiogram (CTA) of the head and neck: The left vertebral artery is not well seen proximal to the PICA origin when compared to the right vertebral artery (double arrows), compatible with occlusion. A = axial CTA (E = magnification), B = coronal reformatted CTA (D = magnification), C = MIP of the CT angiogram.

Excerpt from the On Call Radiology tutorial

Teaching files to identify common Radiology findings on call and in the Emergency Room


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New! Neuro PET tutorial and cases:

Craniopharyngioma






A large enhancing mass was demonstrated in the suprasellar region on MRI scan. The FDG uptake in the mass is inhomogeneous. The periphery of the heterogeneously enhancing component of the mass has minimal FDG uptake indicating low malignant potential. However, in the center of the heterogeneously enhancing component and corresponding to a focus of uniform enhancement on MRI scan, there is increased FDG uptake indicating aggressive feature. If tissue biopsy is planned, biopsy of the center more intensely enhancing region might get better yield. In the area of high T2 signal along the bilateral optic tracts noted on the MRI scan, there is minimal FDG uptake, comparable to the periphery of the larger, more inferior component of the mass. The overall pattern of the lesion is more compatible with a glioma with mixed features and a more aggressive component at the center than a germ cell metastasis. 
Tracer uptake in the rest of the cerebral cortex, subcortical structure, cerebellum are unremarkable.

Excerpt from the Neuro PET brain atlas

An interactive atlas and reference database for normal findings and pathologies on brain PET imaging


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