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
So, these are images of a 78 year old
0:03
with left-sided weakness,
0:05
and you can see that there's an area with
0:09
DWI hyperintensity, ADC hypointensity,
0:13
consistent with an acute to subacute infarction.
0:17
Notice that part of it,
0:18
along the periphery is already bright on ADC,
0:21
so there's some pseudonormalization.
0:23
When you're comparing the whole region of ADC
0:26
that FLAIR abnormality.
0:29
There's swelling in effacement sulci,
0:32
as you can see pretty well in the FLAIR,
0:33
here's a little bit of effacement
0:35
of the posterior horn of lateral ventricle,
0:37
and again, mixed ADC,
0:39
partly restricted, partly elevated.
0:40
And then when we look at the SWI images,
0:44
we can see this kind of confluent
0:46
little hemorrhages.
0:47
So, this is petechial hemorrhage
0:50
in a subacute infarction and
0:55
we also had some ASL images,
0:58
and you can see there's a matched,
1:00
relatively matched defect between the ASL
1:03
and the DWI.
1:06
So, that is good.
1:08
That means the infarct is probably not going to extend.
1:11
And then when we look at the MRA,
1:14
we can see that the MCA
1:16
looks pretty good on that side.
1:17
There's not approximal embolus.
1:20
So, match defect, subacute infarct,
1:23
petechial hemorrhage,
1:24
mass effect will not extend
1:26
because there's no tissue at risk.
Case - Subacute Stroke Evaluation (Case 2)
HIDEInteractive Transcript
0:00
So, these are images of a 78 year old
0:03
with left-sided weakness,
0:05
and you can see that there's an area with
0:09
DWI hyperintensity, ADC hypointensity,
0:13
consistent with an acute to subacute infarction.
0:17
Notice that part of it,
0:18
along the periphery is already bright on ADC,
0:21
so there's some pseudonormalization.
0:23
When you're comparing the whole region of ADC
0:26
that FLAIR abnormality.
0:29
There's swelling in effacement sulci,
0:32
as you can see pretty well in the FLAIR,
0:33
here's a little bit of effacement
0:35
of the posterior horn of lateral ventricle,
0:37
and again, mixed ADC,
0:39
partly restricted, partly elevated.
0:40
And then when we look at the SWI images,
0:44
we can see this kind of confluent
0:46
little hemorrhages.
0:47
So, this is petechial hemorrhage
0:50
in a subacute infarction and
0:55
we also had some ASL images,
0:58
and you can see there's a matched,
1:00
relatively matched defect between the ASL
1:03
and the DWI.
1:06
So, that is good.
1:08
That means the infarct is probably not going to extend.
1:11
And then when we look at the MRA,
1:14
we can see that the MCA
1:16
looks pretty good on that side.
1:17
There's not approximal embolus.
1:20
So, match defect, subacute infarct,
1:23
petechial hemorrhage,
1:24
mass effect will not extend
1:26
because there's no tissue at risk.
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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