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Training Collections
Library Memberships
Buy One, Get One Free!On-demand course library with video lectures, expert case reviews, and more
Fellowship Certificate™ Programs
Buy One, Get One Free!Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
Ultimate Learning Pass
25% Off!Unlock access to our full Course Library and all self-paced Fellowships.
Continuing Medical Education (State CME)
Complete all of your state CME requirements in one convenient place.
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.
Case Crunch: Rapid Case Review (Free)
Register for free live board reviews.
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.
Compliance
NewTrack, fulfill, and report on all your radiologists' credentialing and licensing requirements.
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're going to talk about stroke mimics or other causes
0:03
of restricted diffusion. They're not acute ischemic strokes.
0:06
So one cause is seizure.
0:08
It usually has cortical restricted diffusion,
0:11
frequently in the temporal lobe,
0:13
but sometimes in the frontal and parietal lobes.
0:16
Frequently, the thalamus is involved because it's a relay station
0:19
between the cortex and the brainstem, and it's
0:22
usually in a non-arterial distribution.
0:24
MELAS can also cause strokes of multiple ages
0:27
in non-arterial distributions.
0:29
Hypoglycemia can cause restricted diffusion.
0:33
It frequently involves the occipital and parietal lobes,
0:35
but can involve other areas as well.
0:38
HSV encephalitis is a necrotizing encephalitis
0:42
and can frequently involve the limbic system.
0:45
The patients present with fever and seizures
0:47
and behavioral changes.
0:49
Central pontine myelinolysis is usually caused by rapid
0:52
correction of sodium.
0:54
You see it in the central pons
0:55
versus the hemipons,
0:57
which is what you see with acute infarction.
0:59
And Metastases can cause restricted diffusion
1:02
due to dense cell packing.
1:04
They usually have enhancement
1:06
but early strokes do not have enhancement.
Stroke Mimics - Other Causes of Restricted Diffusion
HIDEInteractive Transcript
0:00
Today, we're going to talk about stroke mimics or other causes
0:03
of restricted diffusion. They're not acute ischemic strokes.
0:06
So one cause is seizure.
0:08
It usually has cortical restricted diffusion,
0:11
frequently in the temporal lobe,
0:13
but sometimes in the frontal and parietal lobes.
0:16
Frequently, the thalamus is involved because it's a relay station
0:19
between the cortex and the brainstem, and it's
0:22
usually in a non-arterial distribution.
0:24
MELAS can also cause strokes of multiple ages
0:27
in non-arterial distributions.
0:29
Hypoglycemia can cause restricted diffusion.
0:33
It frequently involves the occipital and parietal lobes,
0:35
but can involve other areas as well.
0:38
HSV encephalitis is a necrotizing encephalitis
0:42
and can frequently involve the limbic system.
0:45
The patients present with fever and seizures
0:47
and behavioral changes.
0:49
Central pontine myelinolysis is usually caused by rapid
0:52
correction of sodium.
0:54
You see it in the central pons
0:55
versus the hemipons,
0:57
which is what you see with acute infarction.
0:59
And Metastases can cause restricted diffusion
1:02
due to dense cell packing.
1:04
They usually have enhancement
1:06
but early strokes do not have enhancement.
Report
Faculty
Pamela W Schaefer, MD, FACR
Professor of Radiology, Vice Chair of Education
Massachusetts General Hospital
Tags
Vascular Imaging
Perfusion
Neuroradiology
Neuro
MRP
MRI
MRA
Head and Neck
CTP
CTA
CT
Brain
Angiography
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