introduction - lsu health new orleans · pdf filemyelography myelo-tac myelo-mri . cerebral...
TRANSCRIPT
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Introduction
to
Neuroradiology
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The basic imaging tools
• Fluoroscopy/Radiography
• Computed Tomography
• Magnetic Resonance Imaging
• Digital Substraccion Angiography (DSA)
• Ultrasound
• Nuclear Medicine
Brain Imaging
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Computerized Tomography (CT)
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Computed Tomography (CT, CAT)
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MRI Function
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MRI in the Brain
Axial
Sagittal
Coronal
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T1WI
T2WI
MAGNETIC RESONANCE IMAGING
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FLAIR
DWI
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Normal MRA
Coronal 3 DTOF
MR Angiography
Without contrast medium
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MR Angiography
With Gadolinium
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Neuroangiography
Invasive procedure requiring insertion
of a catheter through the femoral artery up to the carotid.
Iodinated contrast material is injected into the carotid
and vertebral arteries bilaterally and sequential images
are obtained.
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DIGITAL SUSTRACTION
ANGIOGRAPHY
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DIGITAL
SUSTRACTION
ANGIOGRAPHY
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MYELOGRAPHY MYELO-TAC
MYELO-MRI
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CEREBRAL VASCULAR EVENT
• ISCHEMIC
• HEMORRHAGIC
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ACUTE INFARCT
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CT
• LOSS OF DEFINITION BETWEEN
GRAY AND WHITE MATTER
• ILL DEFINITION OF INTERNAL
CAPSULE
• HYPERDENSE MIDDLE CEREBRAL
ARTERY
EARLY SIGS OF ISCHEMIC INFARCT
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HYPERDENSE MCA
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CHRONIC INFARCT
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EARLY SIGNS OF ISCHEMIC INFARCT
MRI
• T1 HYPOINTENSITY
• T2, FLAIR HYPERINTENSITY
• DWI HYPERINTENSITY
• DECREASED SIGNAL IN PERFUSION
IMAGES
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T 1
FLAIR
DIFUSION
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SUBACUTE INFARCT
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LUXURY PERFUSION
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CT DWI Hours Minutes
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Ventricular hemorrhage and parenchymal infarct
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CEREBRO VASCULAR EVENT
ISCHEMIC
THROMBO EMBOLIC
VASCULITIS
DISSECTION
FIBROMUSCULAR DISPLASIA
VENOUS THROMBOSIS
ANOXIA
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ATHEROSCLEROTIC PLAQUE
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COLOR AND PULSED
DOPPLER
ULTRASOUND
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B MODE
ULTRASOUND
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FIBROMUSCULAR
DISPLASIA
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DISSECTION
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SUBACUTE INFARCT
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VERTEBRAL ARTERY
DISSECTION
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VASCULITIS
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SSS THROMBOSIS
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VENOUS INFARCT
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CEREBRO VASCULAR EVENT
• HEMORRHAGIC
HYPERTENSION
ANEURYSM
VASCULAR MALFORMATION
TRAUMA
COAGULOPATHY
AMYLOIDOSIS
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HYPERTENSION
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ANEURYSM
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Cerebral Arterio Venous Malformation (AVM)
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CTA 3D
RECONSTRUCTION
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TRAUMA
• CONTUSION
• DIFFUSE AXONAL INJURY
• SUBDURAL HEMATOMA
• EPIDURAL HEMATOMA
• SUBARACHNOID HEMORRHAGE
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EPIDURAL HEMATOMA
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SUBACUTE SUBDURAL
HEMATOMA
CHRONIC SUBDURAL
HEMATOMA
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DIFFUSE AXONAL INJURY
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SEIZURE
• CONGENITAL MALFORMATION
• MESIAL SCLEROSIS
• CVA
• POSTTRAUMATIC
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MESIAL SCLEROSIS
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INFLAMMATORY
• MENINGO ENCEPHALITIS
• ABCESS
• TOXOPLASMOSIS
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MENINGITIS
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NEOPLASIA
• GLIOMAS
• LYMPHOMA
• MEDULOBLASTOMA
• PINEAL TUMOR
• PITUITARY ADENOMA
• EXTRAAXIAL TUMORS
• MENINGIOMA
• SCHWANNOMA
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MEDULLOBLASTOMA
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LYMPHOMA
ASTROCITOMA
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HIGH GRADE GLIOMA
(GRADE III)
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MENINGIOMA
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DEMYELINATING DISEASE
• MULTIPLE SCLEROSIS
• ADEM
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MULTIPLE SCLEROSIS
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MULTIPLE SCLEROSIS
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MS
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OPTIC NEURITIS
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MULTIPLE SCLEROSIS
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TOXOPLASMOSIS
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Differential Diagnosis for ring-enhancing lesions:
MAGICAL DR
M - Metastasis, MS
A - Abscess
G - Glioblastoma, Granuloma
I - Infarct (esp. Basal ganglia)
C - Contusion (rare)
A - AIDS (Toxo, etc.)
L - Lymphoma (in aids)
D - Demyelination (active)
R - Resolving hematoma, Radiation change (necrosis)
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LYMPHOMA
ABSCESS
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RESOLVING HEMATOMA