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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.
0:01
These are images of a patient who came in with
0:04
some mental status changes and
0:07
intermittent speech changes.
0:09
And you can see this lesion characterized by
0:12
partially restricted diffusion.
0:14
DWI, bright.
0:15
ADC, dark.
0:16
Part of it's sort of isointense on ADC images.
0:20
When you're comparing it with the FLAIR
0:21
abnormality and the sort of wedge
0:23
shape defect on FLAIR,
0:26
that's a little bit bigger than the DWI and ADC
0:28
because, as you can see,
0:29
some parts of this are already
0:30
pseudo normalized in ADC.
0:32
So, it kind of looks like a subacute infarct.
0:35
But let's keep inspecting more
0:37
because it could be some funny tumor.
0:39
And you can see these little
0:40
areas of petechial hemorrhage,
0:42
which would be hemorrhagic infarction 1,
0:44
according to ECA.
0:46
In the area of the restrictive diffusion,
0:49
we also gave contrast,
0:51
and you can see on this contrast
0:53
enhanced scan in that region,
0:55
there's gyroform enhancement throughout that region,
1:00
and we can follow that all the way up.
1:02
We can also look at that in another plane.
1:05
And again,
1:05
you can see the enhancements gyroform,
1:07
which is very classic of both arterial
1:10
and venous infarction.
1:11
This is in an MCA distribution.
1:13
So, we're kind of thinking that this is
1:15
a subacute infarction with swelling,
1:16
gyroform enhancement and petechial hemorrhage.
1:19
And then, we'll take a look at the MRA.
1:22
And you can see on the MRA,
1:24
there's stenosis near the MCA bifurcation.
1:27
There's relatively poor flow related
1:29
enhancement in the MCA territory.
1:31
So, even though patient presented
1:33
in the subacute period,
1:35
it's matching perfectly all the findings
1:37
with a subacute stroke.
Case - Subacute Stroke Evaluation (Case 1)
HIDEInteractive Transcript
0:01
These are images of a patient who came in with
0:04
some mental status changes and
0:07
intermittent speech changes.
0:09
And you can see this lesion characterized by
0:12
partially restricted diffusion.
0:14
DWI, bright.
0:15
ADC, dark.
0:16
Part of it's sort of isointense on ADC images.
0:20
When you're comparing it with the FLAIR
0:21
abnormality and the sort of wedge
0:23
shape defect on FLAIR,
0:26
that's a little bit bigger than the DWI and ADC
0:28
because, as you can see,
0:29
some parts of this are already
0:30
pseudo normalized in ADC.
0:32
So, it kind of looks like a subacute infarct.
0:35
But let's keep inspecting more
0:37
because it could be some funny tumor.
0:39
And you can see these little
0:40
areas of petechial hemorrhage,
0:42
which would be hemorrhagic infarction 1,
0:44
according to ECA.
0:46
In the area of the restrictive diffusion,
0:49
we also gave contrast,
0:51
and you can see on this contrast
0:53
enhanced scan in that region,
0:55
there's gyroform enhancement throughout that region,
1:00
and we can follow that all the way up.
1:02
We can also look at that in another plane.
1:05
And again,
1:05
you can see the enhancements gyroform,
1:07
which is very classic of both arterial
1:10
and venous infarction.
1:11
This is in an MCA distribution.
1:13
So, we're kind of thinking that this is
1:15
a subacute infarction with swelling,
1:16
gyroform enhancement and petechial hemorrhage.
1:19
And then, we'll take a look at the MRA.
1:22
And you can see on the MRA,
1:24
there's stenosis near the MCA bifurcation.
1:27
There's relatively poor flow related
1:29
enhancement in the MCA territory.
1:31
So, even though patient presented
1:33
in the subacute period,
1:35
it's matching perfectly all the findings
1:37
with a subacute stroke.
Report
Faculty
Pamela W Schaefer, MD, FACR
Professor of Radiology, Vice Chair of Education
Massachusetts General Hospital
Tags
Vascular Imaging
Neuroradiology
Neuro
MRI
MRA
Head and Neck
Brain
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