Training Collections
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
Training Collections
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
Lesson
Pre-Course Activities
1 topic, 3 min.
Lesson
Introduction to Stroke Imaging
4 topics, 17 min.
Lesson
Noncontrast CT
5 topics, 14 min.
Lesson
CTA Neck
10 topics, 33 min.
Vascular Imaging in Stroke - CTA vs MRA
2 m.Carotid and Vertebral Vasculopathies Overview & Examples of Atherosclerotic Disease
3 m.Case - Atheromatous Disease with Severe ICA Stenosis
4 m.Carotid & Vertebral Artery Dissection Overview & Examples
3 m.Case - Embolic Stroke with ICA Dissection
5 m.Collagen Vascular Diseases Overview - Examples of FMD, Carotid Web
2 m.Case - Fibromuscular Dysplasia (FMD)
5 m.Case - Ehlers Danlos
7 m.Inflammatory Conditions with Stroke Symptoms - Examples of Takayasu's, TIPIC
4 m.Case - Takayasu’s Arteritis
4 m.Lesson
CTA Head
9 topics, 37 min.
CTA Head in Acute Stroke - Source Images, MIPS, Collaterals
4 m.Case - MCA Stem Embolus with Good Collaterals
5 m.Case - MCA Stem Embolus with Poor Collaterals
4 m.Case - Basilar Tip Thrombus
6 m.Circle of Willis Stenoses: Differential Diagnoses
2 m.Case - Moya Moya disease
6 m.Case - Reversible Cerebral Vasoconstrictive Syndrome (RCVS)
5 m.Case - Primary Angiitis of the CNS (PACNS)
7 m.Infectious Causes of Multifocal Circle of Willis Stenosis
2 m.Lesson
CT Perfusion
3 topics, 15 min.
Lesson
MRI (DWI, FLAIR, SWI) of Acute Stroke
3 topics, 14 min.
Lesson
MRA of Head and Neck
6 topics, 18 min.
Lesson
Multifocal Strokes With No Visualized Vascular Abnormality
6 topics, 26 min.
Lesson
Brain Ischemia, Hypoxia, & Death
6 topics, 16 min.
Lesson
Stroke Mimics & Other Causes of Restricted Diffusion
7 topics, 18 min.
Stroke Mimics - Other Causes of Restricted Diffusion
2 m.Case - Seizure (Stroke Mimic)
4 m.Case - MELAS (Stroke Mimic)
3 m.Case - Hypoglycemia (Stroke Mimic)
3 m.Case - Herpes Virus Encephalitis (Stroke Mimic)
4 m.Case - Osmotic Demyelination Syndrome (Stroke Mimic)
3 m.Case - Brain Metastases (Stroke Mimic)
4 m.Lesson
MR Perfusion
8 topics, 17 min.
MR Perfusion - Data, Maps and Uses
4 m.Case - MR Perfusion Target Mismatch (Good Collaterals)
2 m.Case - MR Perfusion Target Mismatch (Poor Collaterals)
3 m.Case - Ischemia Detected Only on MR Perfusion (Case 1)
2 m.Case - Ischemia Detected Only on MR Perfusion (Case 2)
3 m.Arterial Spin Labelling Perfusion - Usage Examples
3 m.Case - ASL Matched Defect
2 m.Case - ASL Showing Tissue at Risk
2 m.Lesson
Subacute Stroke & Differentials
5 topics, 13 min.
0:00
Today, we'll be talking about multifocal strokes
0:02
with no significant vascular abnormality
0:04
on MRA or CTA of the head and neck.
0:07
There are five entities we're going to discuss.
0:09
The first is cardiovascular sources.
0:11
It might be cardiac source of valve vegetation.
0:14
Frequently, you see it in patients with atrial fibrillation.
0:18
It might be systemic hypotension or patients
0:21
with a hypercoagulability state.
0:23
Usually, you see strokes in multiple vascular distributions,
0:27
frequently involving the border zones.
0:29
We'll also talk about venous sinus thrombosis,
0:33
including cortical vein, superior sagittal
0:35
and transverse sinus thrombosis.
0:36
The lesions are in non-arterial distribution.
0:39
They tend to have hemorrhage, edema,
0:41
and may have restricted or facilitated diffusion.
0:45
Cadasil is inherited disorder and they have white matter
0:49
lesions involving the anterior,
0:51
temporal lobe and external capsules,
0:53
as well as periventricular and subcortical white matter.
0:56
They tend to have a lot of microhemorrhages
0:59
and small infarctions.
1:01
Susac syndrome involves the gray and white
1:04
matter and it looks like multiple sclerosis
1:07
can involve the corpus callosum,
1:09
but the lesions tend to be trans colossal.
1:12
They can also have leptomeningeal enhancement.
1:15
And of course,
1:15
they have retinal artery thrombosis
1:18
and hearing loss,
1:19
as you'll learn in a couple of minutes.
1:22
And fat emboli has a pattern of too numerous
1:26
to count punctate infarctions, microhemorrhages,
1:29
and usually associated with a long bone fracture.
Multifocal Strokes with Unremarkable MRA or CTA
HIDEInteractive Transcript
0:00
Today, we'll be talking about multifocal strokes
0:02
with no significant vascular abnormality
0:04
on MRA or CTA of the head and neck.
0:07
There are five entities we're going to discuss.
0:09
The first is cardiovascular sources.
0:11
It might be cardiac source of valve vegetation.
0:14
Frequently, you see it in patients with atrial fibrillation.
0:18
It might be systemic hypotension or patients
0:21
with a hypercoagulability state.
0:23
Usually, you see strokes in multiple vascular distributions,
0:27
frequently involving the border zones.
0:29
We'll also talk about venous sinus thrombosis,
0:33
including cortical vein, superior sagittal
0:35
and transverse sinus thrombosis.
0:36
The lesions are in non-arterial distribution.
0:39
They tend to have hemorrhage, edema,
0:41
and may have restricted or facilitated diffusion.
0:45
Cadasil is inherited disorder and they have white matter
0:49
lesions involving the anterior,
0:51
temporal lobe and external capsules,
0:53
as well as periventricular and subcortical white matter.
0:56
They tend to have a lot of microhemorrhages
0:59
and small infarctions.
1:01
Susac syndrome involves the gray and white
1:04
matter and it looks like multiple sclerosis
1:07
can involve the corpus callosum,
1:09
but the lesions tend to be trans colossal.
1:12
They can also have leptomeningeal enhancement.
1:15
And of course,
1:15
they have retinal artery thrombosis
1:18
and hearing loss,
1:19
as you'll learn in a couple of minutes.
1:22
And fat emboli has a pattern of too numerous
1:26
to count punctate infarctions, microhemorrhages,
1:29
and usually associated with a long bone fracture.
Report
Faculty
Pamela W Schaefer, MD, FACR
Professor of Radiology, Vice Chair of Education
Massachusetts General Hospital
Tags
Vascular Imaging
Vascular
Perfusion
Neuroradiology
Neuro
MRP
MRI
MRA
Head and Neck
CTP
CTA
CT
Brain
Angiography
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