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

Slides:

Advertisements

Similar presentations

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

Advertisements

Axial T1-weighted image after contrast administration (A) and a FLAIR image (B) demonstrating a left parietal subcortical DVA with deep venous drainage.

Precontrast coronal T1-weighted view shows metastatic nodules (long arrows) from breast cancer in the vicinity of the left BPL and another metastatic mass.

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.

A, Left common carotid angiography (lateral view).

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

Right carotid angiogram (A) demonstrates a small carotid cave aneurysm in a patient who had an anterior communicating artery aneurysm previously treated.

A and B, The superior sagittal sinus (straight arrow), straight sinus (arrowhead), and vein of Galen (curved arrow) are clearly depicted, and were seen.

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.

A case with near-occlusion with full collapse, reprinted with permission from Fox et al.1 Lateral common carotid angiogram shows the thin, threadlike,

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

A 40-year-old man who presented with left-sided pulsatile tinnitus.

A 7-month-old boy with left hemimegalencephaly

Normal schematic diagram of the aortic arch and the great vessels demonstrates the embryologic origins of the arch and its major branches. Normal schematic.

CT perfusion maps of MTT

Images from first session with a head coil show suspicion of carotid dissection. Images from first session with a head coil show suspicion of carotid dissection.

Axial CT scan in a patient with left vocal cord paralysis shows atrophy of the left PCA muscle (arrow indicates normal right PCA muscle; arrowhead, laryngeal.

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

Three perfusion sections.

Normal apical ligament (arrow) and normal anterior atlantoaxial ligament (arrowhead) in the diagram (A) and the midsagittal T2-weighted MR image (B) in.

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

A, MIP coronal 3D PSIF image showing class II injury to the right IAN with mild increase in caliber (less than 50% of the left) and signal intensity of.

A and B, Venous phase of a conventional intra-arterial catheter angiogram clearly shows flow within the nondominant transverse sinus (A, arrow), whereas.

Time course analysis of the response in V1 to the M and P stimuli for a single subject. Time course analysis of the response in V1 to the M and P stimuli.

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.

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

Images from first session with a head-neck coil show return of flow in the left internal carotid artery within minutes. Images from first session with.

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

A, Oblique angiogram of the left carotid artery reveals two posttraumatic aneurysms. A, Oblique angiogram of the left carotid artery reveals two posttraumatic.

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.

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,

A 34-year-old man with severe headache and blurry vision was diagnosed with Moyamoya disease. A 34-year-old man with severe headache and blurry vision.

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.

Four more examples of missed additional aneurysms on DSA

Results of aneurysm treatment with flow modification only.

Basilar artery diameter measured with CTA in the delayed stage of SAH

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, Axial high-resolution MR imaging in a 5-month-old girl with clinically suspected right-sided brachial plexus palsy shows avulsion injury of the right.

Axial reconstructed images of rotational angiogram of the left external carotid artery show the fistulous pouch (white arrows) draining through the posterior.

High-resolution MR imaging, CTA, and sonography of the left carotid artery of a 77-year-old man. High-resolution MR imaging, CTA, and sonography of the.

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.

Coronal postcontrast T1-weighted image of the orbits in patient 1 demonstrates a heterogeneously enhancing ovoid lesion involving the right medial rectus.

A, The axial HRCT image of the right temporal bone in case 1 shows an erosion in the posterior temporal bone wall (arrow). A, The axial HRCT image of the.

A case with near-occlusion with full collapse.

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

A 47-year-old woman with minor CSs with left motor weakness and sensory disturbance. A 47-year-old woman with minor CSs with left motor weakness and sensory.

Endovascular coil occlusion of an enlarging carotid artery pseudoaneurysm. Endovascular coil occlusion of an enlarging carotid artery pseudoaneurysm. Sagittal.

Hyperperfused stroke territory on ASL

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

A, Craniocaudal collapsed MIP image of 3D TOF-MRA shows right MCA occlusion in case 2. A, Craniocaudal collapsed MIP image of 3D TOF-MRA shows right MCA.

External carotid angiogram, lateral view, with midarterial (A) and capillary (B) phase, shows the rich vascularity of the tumor. External carotid angiogram,

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

69-year-old woman with left hemispheric TIAs and left orbital bruit.

Axial T2-weighted image (A) demonstrates focal cortical dysplasia (arrow) centered in the left anterior temporal lobe in a right-handed patient. Axial.

Representative quantitative maps of a patient with brain metastasis.

Axial T2-weighted MR image shows normal flow void in the right internal jugular vein (arrows), whereas flow-related enhancement can be seen in the left.

A and B, Two consecutive axial CT scans in a patient with a right-sided glomus vagale show atrophy of the right PCA muscle and right cricothyroid muscle.

Region-of-interest technique for perfusion determination.

Imaging plane for arterial spin labeling method.

Clustered box-and-whisker graphs show the differences in the mean values of hemodynamic parameters according to the presence of BMVs in each vascular territory.

The ASPECTS system scores arteries distal to the occlusion (0, artery not seen; 1, less prominent; 2, equal or more prominent compared with a matching.

Patient 9. Patient 9. Ruptured right cavernous sinus aneurysm in a 74-year-old woman with bilateral exophthalmus, ophthalmoplegia, and decreased vision.A.

Axial CT at level of thyroid cartilage shown on soft tissue window (width, 340 HU; center, 43 HU) in panel A and narrow window (width, 1 HU; center, 130.

Stent placement for treatment of acute intracranial occlusion.

A, Baseline DWI, RMHV on GRE-T2

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

Presentation transcript:

CTP. CTP. Chronic left internal carotid artery occlusion. A, Baseline. B, After ACZ administration. There is significant hypoperfusion in the left hemisphere at baseline with decreased CBF and increased TTP (A, short arrows). After administration of ACZ (B), CBF decreases throughout the left hemisphere, resulting in negative calculated CVR percentages. The left-sided TTP increases even further in post-ACZ flow maps as seen by the accentuated asymmetry (B, long arrows). Note the normal increase in the right-sided CBF after the vasodilatory stimulus of ACZ (B, arrowheads). A.S. Vagal et al. AJNR Am J Neuroradiol 2009;30:876-884 ©2009 by American Society of Neuroradiology