Today’s MRI: Posterior Reversible encephalopathy syndrome (PRES)

Posterior reversible encephalopathy syndrome (PRES) (also known as hypertensive encephalopathy) is a neurotoxic state that occurs secondary to the inability of posterior circulation to auto-regulate in response to acute changes in blood pressure. Hyperperfusion with resultant disruption of the blood brain barrier results in vasogenic oedema, but no infarction, most commonly in the parieto-occipital regions.

It should not be confused with chronic hypertensive encephalopathy (aka hypertensive microangiopathy) which results in microhemorrhages in the basal ganglia, pons and cerebellum.

Learn more at http://radiopaedia.org/articles/posterior-reversible-encephalopathy-syndrome-1

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Ring-enhancing Lesions

Pediatric Radiology

These are the slides that go along with a talk I gave recently on pediatric radiology. Included are some statistics on imaging, revision of guidelines for pediatric patients, a dosing table for procedures in mGy and six clinical cases including aortic coarctation, copper beaten skull, osteogenesis imperfecta, cystic fibrosis, Tetralogy of Fallot and Aicardi syndrome.

This presentation is available for download via Slideshare should you wish to reuse materials contained within.

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