Cerebral blood flow imaging . Relation to blood rheology
نویسندگان
چکیده
A number of techniques allow imaging of the cerebral blood flow (CBF). Flow-sensitive time-of –flight (TOF) magnetic resonance imaging (MRI) demonstrates good representation of the flow but the extracranial hemodynamics could be assessed by color duplex ultrasound of the carotid arteries. Computerized tomography (CT), Xenon enhanced or CT perfusion with iodinated contrast, singlephoton emission computed tomography (SPECT) with HMPAO, positron emission tomography (PET) with radiolabeled water, contrast perfusion-weighted and non-invasive MRI technique using continuous arterial spin labeling (CALS) provide precise assessment of cerebral perfusion with measurement of blood flow velocities. The contrast agents used have hemorheological and vessel wall effects.
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