T2-weighted (A), FLAIR (B), and isotropic DWI (C) of a unilateral lesion in a patient with an acute or chronic presentation of worsening right-sided weakness.

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High-signal-intensity lesions on T2-weighted MR images

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Patient 4.A, Axial T2-weighted scan shows a huge extra-axial cyst (white arrows) with septation (black arrow) that displaces the corpus callosum posteriorly.B,

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A–C, Case 1. A–C, Case 1. Typical white matter changes involving the corpus callosum and the pyramidal tracts (A and C, arrows), dilation of the lateral.

A, Measurement of the angle between the TS-OP line and the hard palate in the lateral scout view of the brain CT (black arrow). A, Measurement of the angle.

Patient 3: Hemorrhage in CNS vasculitis.

Diffusion-weighted (TR = 3900, TE = 94, B = 1000, number of gradient directions = 90) imaging (A) with corresponding apparent diffusion coefficient map.

Right ECA angiogram in the lateral view shows the petrous branch of the MMA (black arrows) and the stylomastoid branch (white arrows) arising from the.

Patient 1, a 15-day-old neonate who presented with encephalopathy

63-year-old patient with right hemiparesis.

Persistent weakness of right lower limb 2 months after EV71 infection in a 16-month-old infant. Persistent weakness of right lower limb 2 months after.

A 12-month-old girl with chronic infarction in bilateral middle cerebral artery territories. A 12-month-old girl with chronic infarction in bilateral middle.

T2-weighted images of a patient with an infarction within the anterior MCA branch territory on day 5 (patient 15) show high SI changes within the ipsilateral.

Coronal FLAIR images (A–C) document decreasing left hippocampal mass effect and signal intensity over 5-year period (black arrowhead). Coronal FLAIR images.

An acute stroke patient with severe stenosis of the left internal carotid artery. An acute stroke patient with severe stenosis of the left internal carotid.

Same patient as shown in figure 3.

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Cardioembolic stroke in the left MCA, 2 hours after onset.

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Patient 6: 24-year-old woman with primary angiitis of the CNS

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Supratentorial and posterior fossa PML

Involvement of the frontal and parietal lobes in patients with isolated cortical hyperintensities. Involvement of the frontal and parietal lobes in patients.

T2-weighted, PD-weighted, FLAIR, and DWI images showing cortical abnormalities in the right parietal lobe; FLAIR and DWI also show abnormalities in the.

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A 61-year-old man presenting with an acute right Wallenberg syndrome.

Case 6: 61-year-old man with sudden right crural hemiparesis.

T2 shinethrough artifact in DWI

Hyperacute infarction (2 hours after onset) in a 39-year-old man with the left internal carotid artery dissection presenting with right-sided weakness.

Brain MR imaging 2 hours after onset of symptoms

A, Right internal carotid artery angiographic approach for coiling of a right ophthalmic ICA aneurysm (black arrowhead) in a 71-year-old woman using 7.78.

Persistent diffusion abnormalities in the brain stem of patient 2.

T1-weighted image (TR/TE, 550/14; signals acquired, 2; matrix, 205/256; section thickness, 5 mm; section gap, 0.5 mm; FOV, 16 cm) of a neonate from the.

Comprehensive imaging of a patient with recent stroke depicting left MCA stenosis. Comprehensive imaging of a patient with recent stroke depicting left.

Case 2: 52 year-old man with intracranial injuries sustained in a motor vehicle accident. Case 2: 52 year-old man with intracranial injuries sustained.

A, Baseline DWI, RMHV on GRE-T2

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Presentation transcript:

T2-weighted (A), FLAIR (B), and isotropic DWI (C) of a unilateral lesion in a patient with an acute or chronic presentation of worsening right-sided weakness. T2-weighted (A), FLAIR (B), and isotropic DWI (C) of a unilateral lesion in a patient with an acute or chronic presentation of worsening right-sided weakness. There are 2 T2-weighted hyperintense lesions involving the genu and posterior limb of the internal capsule (white arrow) and posterolateral putamen (black arrow). Both T2-weighted (A) and FLAIR (B) images reveal lesions of differing age with an anteromedial well-defined encephalomalacic cavity and a posterolateral lesion. The isotropic image (C) confirms a new focal area of infarction within the lateral lenticulostriate artery territory (black arrow) as an area of reduced diffusion. R.I. Aviv et al. AJNR Am J Neuroradiol 2006;27:192-199 ©2006 by American Society of Neuroradiology