applicable neuroradiology for the clinical neurology clerkship lsu medical school new orleans...
TRANSCRIPT
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Applicable Neuroradiology
For the Clinical Neurology Clerkship
LSU Medical School
New Orleans
Stephen Deputy, MD
Clerkship Director
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Applicable NeuroradiologyIntroduction
The field of Radiology first developed following the discovery of X-Rays by Wilhelm Roentgen in 1895. This resulted in widespread clinical use before the damaging effects of ionizing radiation were fully appreciated.
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Applicable Neuroradiology
Plain Films of the Skull were the first application of radiological techniques to the field of Neurology and became widespread beginning around 1905
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Applicable Neuroradiology
Plain Films of the SkullGood for detecting Ca++
Good for Skull Fx’sGood for Foreign BodiesQuick way to look for pneumatization of
cranial sinuses Plain Spine Films
Good for vertebral fractures and dislocationsUsed in evaluation of scoliosisDoes NOT image cord however
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Applicable Neuroradiology
Pneumoencephalogramo Air injected into thecal
sac through LPo Reveals the
ventricular systemo Causes Headaches
(pneumocephaly)o First use in 1918
parenchymal Ca++ and hydrocephalous due to congenital Toxoplasmosis
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Applicable Neuroradiology
Cerebral Angiography First used in 1927 via
direct percutaneous internal carotid artery puncture
Useful for defining cerebral vasculature
Was used to infer tumors or other mass lesions based on the displacement of vascular structures
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Applicable Neuroradiology
Computed Axial Tomographyo First developed in the 60’so Digital geometry is used to
create a 3 dimensional image of the internal aspects from a large series of 2 dimensional X-ray images taken around a single axis of rotation
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Applicable Neuroradiology
Computed Axial Tomographyo Has advantages of quick acquisition timeo Excellent for picking up acute intracranial bloodo Uses “Houndsfield Units” to determine the density
of structures identifiedo Contrast can be used to better define edema or
any process where there is breakdown of the BBBo Bolus contrast administration provides vascular
anatomy (CT Angiogram)o Contrast administration is contraindicated for use
with renal insufficiency or prior allergy
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Applicable Neuroradiology
CT Angiogram showing a Large MCA aneurysm
Contrast-enhanced CTshowing brain abscess and edema
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Applicable NeuroradiologyComputed Axial Tomography
o 5 “B” things that are bright (hyperdense) on CTo Bloodo Bone (or Ca++)o Braino Bullet (or foreign body)o “Bontrast” for “Contrast”
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Applicable Neuroradiology
Cranial Ultrasound Cranial U/S developed in the 70’s Used in infancy as a non-invasive way
to view ventricles and look for intraventricular hemorrhage using the anterior fontanelle as a portal
Used in adults for carotid stenosis/dissection or for cerebral vasospasm
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Applicable Neuroradiology
Neonatal Head U/S with Grade III IVH
Carotid Doppler Ultrasoundshowing ICA stenosis Cranial Doppler with MCA stenosis
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Applicable Neuroradiology
SPECT Single Photon Emission Computed Tomography Developed in 60’s (along with CT) gamma ray-emitting long-acting isotope
(Technetium-99m) shows regional CBF Can help localize seizure onset (Ictal-SPECT) Can be superimposed on CT or MRI More available than PET
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Applicable Neuroradiology
Ictal SPECT superimposed upon brain MRI
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Applicable Neuroradiology
PET Positron Emission Tomography Developed in the 70’s Detects gamma rays released by a
radionuclide tracer linked to a marker FDG (Fludeoxyglucose) most commonly used Other markers include specific
neurotransmitters or their receptors Requires cyclotron to make short half-life
tracers so not as available as PET
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Applicable Neuroradiology
PET showing loss of regional stores of Dopamine in patientswith Parkinson’s disease
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Applicable Neuroradiology
Magnetic Resonance Imaging Developed in the 80’s Powerful magnetic fields cause water molecules to
align along their dipoles Radiofrequency waves produce an
electromagnetic field which transiently knocks the molecules out of alignment
When water molecules re-align within the magnetic field they release energy (photons) which are detected by scanners and following a lot of computer mumbo-jumbo an image is produced
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Applicable NeuroradiologyMagnetic Resonance Imaging
T-1 Imaging Water is dark. Fat (Myelin) is brightGadolinium contrast used to show breakdown of BBB
T-2 ImagingWater is bright. Fat is dark.FLAIR (same as T2 except water is “blacked out”)
Diffusion ImagingShows restricted Diffusion of water suggesting cell deathADC Mapping takes into account brightness of background
T2 signal
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Applicable Neuroradiology
T1 MRIAxial Plane
T1 MRI with Gadoliniumshowing a brain tumor
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Applicable Neuroradiology
T1 Saggital PlaneT1 Coronal Plane
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Applicable Neuroradiology
T2 and FLAIR of Multiple Sclerosis
T2 Axial image
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Applicable Neuroradiology
Diffusion/Perfusion MismatchL MCA Stroke
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Applicable Neuroradiology
T.O.F. MR Angiogram of The Cerebral Vessels
Gadolinium Contrast InjectedMR Angiogram of the Cervical Vessels
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Applicable Neuroradiology
MR Venogram of the Cerebral Sinuses and Draining Veins
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Applicable NeuroradiologyNeuroanatomy CT Scan
Name The Structures
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Applicable Neuroradiology
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Applicable Neuroradiology
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Applicable Neuroradiology
Globe
Ethmoid S.
Clivus
Mastoid Air Cells
Mastoid Air Cells
Sphenoid S.
Frontal S.
Int A
cous
tic
Mea
tus
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Applicable Neuroradiology
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Applicable Neuroradiology
Tons
ils
Medulla
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Applicable Neuroradiology
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Applicable Neuroradiology
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Applicable Neuroradiology
Temporal Lobe
Cerebellar Hemisphere 4th V
entri
cle
Pons
Ba
si
la
r A
rt
er
y
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Applicable Neuroradiology
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Applicable Neuroradiology
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Applicable Neuroradiology
Sylvian Fissure
Temporal Lobe
Midb
rain
3rd Ventricle
Caudate Head Lateral Ventricle
Frontal Lobe
Occipital Lobe
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Applicable Neuroradiology
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Applicable Neuroradiology
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Applicable Neuroradiology
Lateral Ventricle
Falx Cerebri
Frontal Lobe
Occipital Lobe
Parietal Lobe
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Applicable Neuroradiology
T1 SaggitalMRI
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Applicable Neuroradiology
T1 SaggitalMRI
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Applicable Neuroradiology
Frontal Sinus
Sphenoid SinusPituitary
Clivus
Tent
orium
Cer
ebell
i
Tongue
T1 SaggitalMRI
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Applicable Neuroradiology
T1 Saggital MRI
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Applicable Neuroradiology
T1 Saggital MRI
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Applicable Neuroradiology
Genu of CC
Body of CC
Splenium of CC
Tegmentum of MidbrainTectal Plate of Midbrain
PonsM
edul
la
4th Ventricle
Tonsils
T1 Saggital MRI
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Applicable Neuroradiology
T2 Axial MRI
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Applicable Neuroradiology
T2 Axial MRI
Gl
ob
e
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Applicable Neuroradiology
Temporal Lobe
Cerebellar Hemisphere
Vermis
Medulla
T2 Axial MRI
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Applicable Neuroradiology
T2 Axial MRI
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Applicable Neuroradiology
T2 Axial MRI
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Applicable Neuroradiology
Ethmoid Sinus
Sphenoid Sinus
Temporal Lobe
Int Carotid Artery
Basilar ArteryPons
4 th Ventrical
Cerebellar Hemisphere
T2 Axial MRI
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Applicable Neuroradiology
T2 Axial MRI
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Applicable Neuroradiology
T2 Axial MRI
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Applicable Neuroradiology
Frontal Sinus
Frontal Lobe
Temporal Lobe
Internal Carotid
Temporal Tip of Lateral Ventricle
Midbrain
Occipital Lobe
T2 Axial MRI
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Applicable Neuroradiology
T2 Axial MRI
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Applicable Neuroradiology
Cerebral Peduncle
Aqueduct of Sylvius
Mic
key
Mou
se
Mid
brai
n
T2 AxialMRI
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Applicable Neuroradiology
T2 AxialMRI
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Applicable Neuroradiology
T2 AxialMRI
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Applicable Neuroradiology
Frontal Grey M
atter
Frontal White
Matte
r
Head of Caudate
Anterior Horn of Lat Ventricle
Putamen
Thalamus
Splenium of CC
T2 AxialMRI
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Applicable Neuroradiology
T2 AxialMRI
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Applicable Neuroradiology
T2 AxialMRI
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Applicable Neuroradiology
Anterior Limb Internal CapsuleExternal Capsule
Genu of Internal Capsule
Posterior Limb of Internal Capsule
Caudate Head
Putamen
Globus Pallidus
Thalamus
T2 Axial MRI
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Applicable Neuroradiology
T2 CornoalMRI
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Applicable Neuroradiology
T2 CornoalMRI
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Applicable Neuroradiology
T2 CornoalMRI
Cingulate Gyrus
Hippocampus Temporal Lobe
Sylvian Fissure
Superior Saggital Sinus
Basilar Artery
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Applicable Neuroradiology
MR Angiogramof CerebralVessels
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Applicable Neuroradiology
MR Angiogramof CerebralVessels
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Applicable Neuroradiology
MR Angiogramof CerebralVessels
Internal Carotid Artery
Middle Cerebral Artery
Ant Cerebral Artery
Vertebral Artery
Basilar Artery
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Applicable Neuroradiology
MR Angiogram of Cerebral Vessels
![Page 70: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/70.jpg)
Applicable Neuroradiology
MR Angiogram of Cerebral Vessels
![Page 71: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/71.jpg)
Applicable Neuroradiology
MR Angiogram of Cerebral Vessels
ACA
MCA
ICA
Vertebral Artery
Superior Cerebellar Artery
A1 segment of ACA
PCA
M1- segment of MCA
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Applicable Neuroradiology
MR Venogram of Cerebral Vessels
![Page 73: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/73.jpg)
Applicable Neuroradiology
MR Venogram of Cerebral Vessels
![Page 74: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/74.jpg)
Applicable Neuroradiology
MR Venogram of Cerebral Vessels
Superior Saggital S.
Torcula
Transverse S.
Internal Jugular Vein
Straight S
inus
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Applicable Neuroradiology
What is the Abnormality?
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Applicable Neuroradiology
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Applicable Neuroradiology
Large MCA Stroke
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Applicable Neuroradiology
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Applicable Neuroradiology
Hemorrhagic Conversion
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Applicable Neuroradiology
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Applicable Neuroradiology
T1 Axial MRI T2 Axial MRI
Decreased Signal Increased
signal
![Page 82: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/82.jpg)
Applicable Neuroradiology
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Applicable Neuroradiology
DWI restriction ADC Map
Old Gliosis
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Applicable Neuroradiology
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Applicable Neuroradiology
Sub Dural HematomaMass Effect
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Applicable Neuroradiology
![Page 87: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/87.jpg)
Applicable Neuroradiology
Epidural hematomaMass Effect
![Page 88: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/88.jpg)
Applicable Neuroradiology
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Applicable Neuroradiology
Subarachnoid Hemorrhage
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Applicable Neuroradiology
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Applicable Neuroradiology
Edema
Glioma
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Applicable Neuroradiology
![Page 93: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/93.jpg)
Applicable Neuroradiology
Edema
Glioma
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Applicable Neuroradiology
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Applicable Neuroradiology
Metastatic Brain Tumors
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Applicable Neuroradiology
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Applicable Neuroradiology
Hydrocephalus
Transependymal Edema
![Page 98: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/98.jpg)
Applicable Neuroradiology
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Applicable Neuroradiology
Syringomyelia
Ch
ia
ri
![Page 100: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/100.jpg)
Applicable Neuroradiology
Bonus Round
![Page 101: Applicable Neuroradiology For the Clinical Neurology Clerkship LSU Medical School New Orleans Stephen Deputy, MD Clerkship Director](https://reader038.vdocuments.net/reader038/viewer/2022110205/56649c765503460f9492a514/html5/thumbnails/101.jpg)
Applicable Neuroradiology
T2 Axial MRI 4 y.o. with
Gelastic Seizures
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Applicable Neuroradiology
T2 Axial MRI
Hypothalamic Hamartoma
4 y.o. with Gelastic Seizures
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Applicable Neuroradiology
T2 Axial MRI 10 y.o. with Developmental Delay and Epilepsy
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Applicable Neuroradiology
T2 Axial MRI
Schizencephaly/Polymicrogyria
10 y.o. with Developmental Delay and Epilepsy
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Applicable Neuroradiology
The End