الفهرس 
Anatomy of the brain and vascular supplyOnly 14 pages are availabe for public view
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Abstract
Multislice CT allows the combined use of all three
imaging modalities: nonenhanced CT, perfusion CT, and
CT aniography to rapidly obtain comprehensive
information regararding the extent of ischemic demage in
acute stroke patients.
Non-enhanced CT can help to exclude hemorrhage
and detect early signs of infarction but cannot reliably
demonstrate irreversibly damaged brain tissue in the
hyperacute stage of ischemic stroke.
Evalution of patients with ischemic stroke should include
differentiation between reversible and irreversible brain
demage, which is essential for choosing an appropriate
therapy. Perfusion CT provides information about brain
perfusion, which permits differentiation of irreversibly
demaged brain tissue from reversibly impaired “tissse at
risk,” and allows assesment of extent and severity of brain
tissue ischemia.
we usually proceed with perfusion CT and CT
angiography only if hemorrhage has been ruled out with
nonenhanced CT. Even if there are other contraindications
for thrombolysis, CT angiography and perfusion CT are
still frequently performed (they are optional but not
mandatoryand are always performed only after consulting
with the neurologist).