Three perfusion sections.

Slides:

Advertisements

Similar presentations

Copyright © 2003 American Medical Association. All rights reserved.

Advertisements

Copyright © 2001 American Medical Association. All rights reserved.

Cerebral hyperperfusion syndrome after endovascular covered stent grafting for a giant extracranial aneurysm of the internal carotid artery Sakyo Hirai,

Xe-CT CBF maps in a patient with Moyamoya disease.

Case 10: 61-year-old man with hyperacute ischemic stroke with arterial occlusion and increased CBV. A, T2-weighted image (3500/90) is normal except for.

Images in a 53-year-old man with episodes of right-sided numbness

Axial CT scans of the brain and neck performed with contrast medium.

A, ROIs that were drawn in the flow territories of the anterior cerebral artery (cortex: ROIs 1 and 2, basal ganglia: ROIs 5 and 6) and the middle cerebral.

Figure 1 Management of acute ischaemic stroke after ICA-T occlusion

Case 2: 69-year-old man with atrial fibrillation and sudden onset of left-sided hemiparesis. Case 2: 69-year-old man with atrial fibrillation and sudden.

A, Left internal carotid artery (ICA) angiogram showing a left middle cerebral artery (MCA) bifurcation aneurysm and an additional distal MCA aneurysm.B.

Case 1: 15-year-old boy with juvenile nasopharyngeal angiofibroma on the right side. Case 1: 15-year-old boy with juvenile nasopharyngeal angiofibroma.

VW-MR imaging to identify symptomatic, nonstenotic intracranial atherosclerotic plaque. VW-MR imaging to identify symptomatic, nonstenotic intracranial.

Contrast-enhanced coronal CT scan of a rabbit.

Preoperative 3D angiogram (A) shows a very wide-neck large ICA aneurysm. Preoperative 3D angiogram (A) shows a very wide-neck large ICA aneurysm. It could.

A, A 50-year old female patient with acute ischemic stroke (AIS), visible as an area of reduced diffusion (dark region) on the apparent diffusion coefficient.

A 66-year-old man with a calcified cerebral embolus to the left middle cerebral artery.A, Axial 2.5-mm image from a noncontrast brain CT scan shows a calcified.

63-year-old patient with right hemiparesis.

A, Coronal CT scan of the paranasal sinuses in a 45-year-old women with difficulty breathing shows the typical appearance of crista galli pneumatization.

Parent artery occlusion of a giant serpentine aneurysm of the PCA complicated by cerebral infarction in the distal arterial territory. Parent artery occlusion.

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.

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.

A 76-year-old man presenting with acute right-sided symptoms.

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

Case 8: 77-year-old woman with hyperacute ischemic stroke with arterial occlusion and decreased CBV. A, T2-weighted MR image (3500/90) is normal except.

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

A 70-year-old woman with a left middle cerebral artery territory infarct after a coronary angiogram.A, Axial 2.5-mm image from noncontrast brain CT shows.

A 74-year-old man who presented to the emergency department after a fall with left-sided weakness. A 74-year-old man who presented to the emergency department.

Identifying IPH on CE-MRA mask images in a 72-year-old man with a right cerebral ischemic event. Identifying IPH on CE-MRA mask images in a 72-year-old.

A 58-year-old woman with left-sided weakness.

An example of the predicted risk of final infarct for 2 patients with acute ischemic stroke using 2 neural networks trained, respectively, on patients.

Case 2.A, Right internal carotid artery (ICA) angiogram, oblique view, showing a 4-mm aneurysm at the right middle cerebral artery (MCA) bifurcation.B,

A 44-year-old woman with a history of anxiety disorder presenting with acute right facial weakness and expressive aphasia. A 44-year-old woman with a history.

Pial vasodilation. Pial vasodilation. A, Axial GRE T2 image shows a left frontal sulcal SAH (black arrowhead), possibly located in the “watershed” territory.

Endocarditis. Endocarditis. A, Axial brain CT scan shows an isolated slight right frontal subarachnoid hyperattenuation. B, Because of clinical aggravation.

CTP. CTP. Chronic left internal carotid artery occlusion. A, Baseline. B, After ACZ administration. There is significant hypoperfusion in the left hemisphere.

An 87-year-old woman presenting with acute dysarthria, left facial droop, and left-sided weakness. An 87-year-old woman presenting with acute dysarthria,

73-year-old man with left hemiparesis.

Images obtained in an 83-year-old man with cerebral hyperperfusion after carotid stent placement. Images obtained in an 83-year-old man with cerebral hyperperfusion.

An example of the predicted risk of final infarct for 2 patients with acute ischemic stroke using 2 neural networks trained, respectively, on patients.

Anteroposterior (A and C) and lateral (B and C) images from a left internal carotid artery angiogram obtained during the early (A and B) and delayed angiographic.

A 61-year-old male patient with right hemiparesis imaged at 2

Case 2: Agenesis of the left ICA

A 55-year-old woman presenting with left hemiparesis and normal findings on head CT. A, CTP source image shows poor contrast opacification within the right.

Large hemorrhagic conversion following reperfusion in a patient with distal left internal carotid occlusion with poor pial collateral formation. Large.

Coronal T1-weighted contrast-enhanced MR image obtained in January of 1999 at the onset of right hearing impairment shows increased enhancement of the.

Hyperperfused stroke territory on ASL

63-year-old woman with right hemiparesis and aphasia.

A 34-year-old woman with SLE with APS

Multiple PCA associated with Moya-Moya disease, successfully treated with GDC. A, Frontal view of left internal carotid angiogram showing occlusion of.

Comparison between angle-corrected and uncorrected flow velocities and angiographic findings in a 54-year-old woman with MCA stenosis. Comparison between.

A 42-year-old man presenting with progressive deterioration of consciousness. A 42-year-old man presenting with progressive deterioration of consciousness.

CT scans and data analysis obtained from patient 1

A–D, Multiple tiny cortico-subcortical lesions in the right motor region on DWI (approximately 1500/115/18; 2 RR intervals) study (A) confirm the ischemic.

Case 1: 54-year-old man with atrial fibrillation and sudden onset of left-sided hemiparesis. Case 1: 54-year-old man with atrial fibrillation and sudden.

A 71-year-old woman who underwent imaging 7 hours after onset of right hemiparesis and aphasia. A 71-year-old woman who underwent imaging 7 hours after.

A 55-year-old woman (the same patient as in Fig 1) with RCVS complicated by ischemic infarcts. A 55-year-old woman (the same patient as in Fig 1) with.

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

A 78-year-old woman with severe right-sided hemiparesis and aphasia 70 minutes after symptom onset. A 78-year-old woman with severe right-sided hemiparesis.

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

A 36-year-old woman (patient 13) presenting with right hemiparesis and left anterior circulation infarct diagnosed at brain MR imaging. A 36-year-old woman.

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

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.

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

MR revealed a small infarct size and large area of low perfusion in the left hemisphere with the occlusion of left middle cerebral artery (MCA). (A) Diffusion-weighted.

A 55-year-old male patient who presented with tetraparesis and decreased consciousness for 6 hours. A 55-year-old male patient who presented with tetraparesis.

Twelve-year-old girl with coinfection of JE and NCC (patient 5).

CT perfusion maps in a 51-year-old patient presenting with right-sided hemiparesis who was diagnosed with Moyamoya disease, demonstrating bilateral supraclinoid.

A 21-year-old woman with a right sensory-motor deficit and aphasia for 60 minutes. A 21-year-old woman with a right sensory-motor deficit and aphasia for.

Presentation transcript:

Three perfusion sections. Three perfusion sections. Occlusion of a left MCA branch and of the ipsilateral ICA. This 62-year-old man was admitted with right hemiparesis and aphasia 8 hours after the onset of symptoms. The color-coding is similar to that used in figure 1. A, Early conventional CT scans appear normal, although retrospectively, a discrete hypodense area can be seen in the cortex (A2).B, CBF maps show severe flow reduction in the fronto-opercular territory of the left MCA.C, CBV maps show the ischemic region to be less pronounced and indicate a 10% increase in blood volume in the surrounding cortex, which compensated for the reduced flow velocity in the territory of the left carotid artery.D, TTP concentration of contrast enhancement maps show time delay not only in the ischemic zone but also in the territories of the entire left MCA and anterior cerebral artery due to occlusion of the ICA, as revealed by sonography. Acute left carotid artery occlusion might have led to embolization in a frontal branch of the MCA.E, Follow-up CT scans, obtained 3 days after stroke, show a small infarct representing the former ischemic area of the frontal cortical territory of the MCA (red arrowheads). Thomas E. Mayer et al. AJNR Am J Neuroradiol 2000;21:1441-1449 ©2000 by American Society of Neuroradiology