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Training Collections
Library Memberships
On-demand course library with video lectures, expert case reviews, and more
Fellowship Certificate™ Programs
Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
Ultimate Learning Pass
Unlock access to our full Course Library and all self-paced Fellowships.
Noon Conference (Free)
Get access to free live lectures, every week, from top radiologists.
Case of the Week (Free)
Get a free weekly case delivered right to your inbox.
Dr. Resnick's MSK Conference
Learn directly from the MSK Master himself.
Lower Extremities MRI Conference
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
For Training Programs
Supplement your training program with case-based learning for residents, registrars, fellows, and more.
For Private Practices
Upskill in high growth, advanced imaging areas.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
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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