Neuroradiology 1.MRI (diffusion) early ischemic stroke 2.CT for trauma and CVA/stroke to exclude hemorrhage 3.MRA or DSA for Aneurysm (SAH)

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Presentation transcript:

Neuroradiology 1.MRI (diffusion) early ischemic stroke 2.CT for trauma and CVA/stroke to exclude hemorrhage 3.MRA or DSA for Aneurysm (SAH)

MRA ACUTE INFARCT /MCA occlusion CT ischemic infarct CT ischemic infarct

IMAGING TECHNIQUES PLAIN FILMS PLAIN FILMS COMPUTED TOMOGRAPHY COMPUTED TOMOGRAPHY MAGNETIC RESONANCE IMAGING MAGNETIC RESONANCE IMAGING DIGITAL ANGIOGRAPHY (or CTA) for aneurysm DIGITAL ANGIOGRAPHY (or CTA) for aneurysm ULTRASOUND ULTRASOUND DOPPLER US DOPPLER US PET PET

CEREBRAL VASCULAR EVENT ISCHEMIC ISCHEMIC

T 1 FLAIR DIFFUSION

CT of ischemic CVA Right posterior fossa

Cerebral Edema CYTOTOXIC EDEMA= stroke (CVA), wedge-shaped (vascular teriitory) hypodensity at CT, High Signal at MRI CYTOTOXIC EDEMA= stroke (CVA), wedge-shaped (vascular teriitory) hypodensity at CT, High Signal at MRI VASOGENIC = tumor VASOGENIC = tumor

SAH Subarachnoid Hemorrhage TRAUMA TRAUMA ANEURYSM : CT Angiogram or MRA or Digital Subtraction Angiogram shows aneurysm ANEURYSM : CT Angiogram or MRA or Digital Subtraction Angiogram shows aneurysm AVM AVM CT for Acute Hemorrhage: Hyperdense (recent blood)

CT Left subdural hematoma

EPIDURAL HEMATOMA Trauma, does not cross Sutures. Hyperdense at CT