Among various modern radiologic methods,
the magnetic resonance imaging (MRI) is the most perspective for surveying of morphological and functional conditions of the cerebral vascular system.
It provides the widest range of approaches to visualization of the CNS and cerebral hemodynamics comparing to all other existing radiologic methods.
MR angiography also allows measuring quantitative characteristics of liquid flows applying the Quantitative Flow (Q-Flow) technique .
Being used together with other impulse sequences,
Q-Flow provides extended results of morphological and functional survey of the vascular structures...
Methods and Materials
All examinations were performed on a 1.5T MR-scanner.
Two groupsvolunteers were examined using routine protocol (T1-WI,
3D PC-MRA and DWI) and phase contrast MR-angiography retrospectively cardiac triggered (Quantitative Flow (Q-Flow) technique) .
The 60 healthy volunteers at the age 18 - 55 years old were included at control group.The exclusion criteria were any neurological cerebral symptoms,
or other abnormalities detected on routine MRI exam.The second group was consisted in 15 patients at the age 18 - 36 years old with bilateral...
We obtained the values of arterial blood flow parameters (mean velocity,
mean flux) for each ICA levels depending on cardiac cycle phases.Q-Flow technique allows to visualize vascular bundle pulsation with color mapping of the direction and velocity of blood flow during one cardiac cycle at cine sequence (Fig.4).
Graph depending velocities parameters of phases cardiac cycle have a symmetrical in-phase character.
There are two peaks at graphs reflecting the heart.
The first is ventricular systole,
the second is the closure of aortic valve...
Q-Flow technique could be successfully applied to quantification of blood flow parameters at the different levels of the ICA in a short time.
There were defined the normal values of mean velocity,
peak velocity of vessels at different levels of the ICA.
For all measured hemodynamic parameters was not determined significant difference between the mean values for right and left ICA.
The velocity parameters of arterial blood flow tend to the normal values at intracranial levelsin case the bilateralICAS-shape elongation patients without ischemic....
Flow dynamics of cerebrospinal fluid: assessment with phase-contrast velocity MR imaging performed with retrospective cardiac gating // Radiology.1992 May;183(2):395-405.
Radak D.,Babić S.,Tanasković S.,Matić P,Sotirović V.,Stevanović P.,Jovanović P.,Gajin P.Are thecarotidkinkingandcoilingunderestimated entities? //Vojnosanit Pregl.2012 Jul;69(7):616-9.
and Carotids: A Review.
4.Oktar SO,Yücel C.,
Blood-flow volume quantification ininternalcarotidandvertebralarteries: comparison of 3 different ultrasoundtechniques withphase-contrast MR imaging.//AJNR Am J...
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