Keywords:
Ischaemia / Infarction, Haemodynamics / Flow dynamics, Blood, Imaging sequences, Diagnostic procedure, MR, CT-Angiography, Vascular, Head and neck, Cardiovascular system
Authors:
Y. Stankevich, O. Bogomyakova, L. Shraybman, M. Rezakova, A. Tulupov; Novosibirsk/RU
DOI:
10.1594/ecr2013/C-1751
Results
We obtained the values of arterial blood flow parameters (mean velocity,
peak 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 (Fig.5,
a).
Q-Flow technique was compared with Doppler ultrasound.
Mean velocity was measured at first level of ICA. Graphs are qualitatively similar to the ultrasound and Q–Flow (Fig.5).
The correlation between these methods is confirmed by publish data [4].
The velocity characteristics of arterial blood flow through investigated levels are shown at Fig.6 (a,b,c) for volunteers and patients.
For control gpoup: the mean velocity is maximum at the 2 level,
because that segment is the longest artery straight course.
We didn't found any significant differences for measured hemodynamic parameters between right and left sides.
This data reflects the normal condition,
so it may be used as a comparison for the diagnosis of pathology.
Hemodynamic parameters were significantly lower in the case of bilateral ICA S-shape elongation at cervical levels,
but it were tends to normal values at intracranial levels.