Imaging of Vascular Diseases of the Brain Flashcards
What radiologic test is used to diagnose carotid artery disease?
Ultrasound
24 hours to 1 week describes what age of an ischemic stroke?
Acute
What imaging study may be conducted to determine the age of a hemorrhage?
MRI - blood products appear differently on MRI due to degradation time
Unmanaged hypertension is most associated with what type of hemorrhagic stroke?
Intraparenchymal hemorrhage
Where are nearly all (90%) brain aneurysms found?
Anterior circulation, with most in the ACA & Anterior Communicating Artery
True/False. Ischemic stroke may transform into a hemorrhagic stroke.
True. Vessels dilate and neovascularization occurs due to an ischemic stroke. This may, in turn, cause a hemorrhagic stroke
What signs on a CT image are associated with hyperacute ischemic stroke?
Insular ribbon sign (loss of gray-white matter differentiation) & hyperdense MCA
Early hyperacute refers to what time following an ischemic stroke?
0-6 hours
What radiologic tests are used to diagnose and follow vascular diseases?
CT (CTA) & MRI (MRA) Angiography
Late hyperacute refers to what time following an ischemic stroke?
6-24 hours
Weeks 1-3 following a stroke are described as what age?
Subacute stroke
Subarachnoid hemorrhage is most associated with what pathology?
Ruptured aneurysm & trauma
What imaging test should be ordered if a brain aneurysm is expected?
CTA (CT Angiography)
An MRI is used to confirm acute ischemic stroke. What type of MRI is run?
Diffusion sequence - ischemia appears as a bright area
ADR sequence is the inverse of diffusion and ischemia appears dark. ADR is utilized to create the diffusion sequence image.
What drug may be administered following an ischemic stroke, if the window for TPA has passed?
Aspirin
