The maintenance of adequate blood flow to the brain is critical for normal brain function;
cerebral blood flow, its regulation and the effect of alteration in this flow with disease have …

PURPOSE: To determine the normal values and effects of age and sex on total cerebral
blood flow (CBF) as measured with ungated two-dimensional phase-contrast magnetic …

Background After the occlusion of an internal carotid artery the principal source of collateral
flow is through the arteries of the circle of Willis, but the size and patency of these arteries …

Magnetic resonance imaging (MRI) techniques provide non-invasive and non-ionising
methods for the highly accurate anatomical depiction of the heart and vessels throughout the …

PURPOSE: To prospectively determine the effect of anatomic variations in the circle of Willis
on volume flow in the internal carotid arteries (ICAs) and basilar artery (BA). MATERIALS …

PURPOSE To measure mean blood flow in individual cerebral arteries (carotid, basilar,
anterior cerebral, middle cerebral, and posterior cerebral) using a cine phase contrast MR …

BACKGROUND AND PURPOSE: We sought to derive regional cerebral blood flow using
vessel flows from quantitative MR angiography (qMRA). MATERIALS AND METHODS: Flow …

The circle of Willis (CoW) is a ring-like arterial structure located in the base of the brain and
is responsible for the distribution of oxygenated blood throughout the cerebral mass. To …

Exact knowledge of blood flow characteristics in the major cerebral vessels is of great
relevance for diagnosing cerebrovascular abnormalities. This involves the assessment of …

Measurement of volume flow rates in major cerebral vessels can be used to evaluate the
hemodynamic effects of cerebrovascular disease. However, both age and vascular anatomy …