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Research ArticleTechnical Note
Open Access

Quantification of Cerebral Artery Motion during the Cardiac Cycle

T. Nishida, M. Kinoshita, H. Tanaka, T. Fujinaka and T. Yoshimine
American Journal of Neuroradiology December 2011, 32 (11) E206-E208; DOI: https://doi.org/10.3174/ajnr.A2354
T. Nishida
aFrom the Departments of Neurosurgery (T.N., M.K., T.F., T.Y.)
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M. Kinoshita
aFrom the Departments of Neurosurgery (T.N., M.K., T.F., T.Y.)
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H. Tanaka
bRadiology (H.T.), Osaka University Graduate School of Medicine, Osaka, Japan.
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T. Fujinaka
aFrom the Departments of Neurosurgery (T.N., M.K., T.F., T.Y.)
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T. Yoshimine
aFrom the Departments of Neurosurgery (T.N., M.K., T.F., T.Y.)
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    Fig 1.

    Schematic illustration of the reconstruction of 4D dynamic CTA into time-phase images and the motion-detection algorithm. A, The window center of the time-phase image is set at each 10% of the R-R interval, and the 4D-CTA image of a single heartbeat was reconstructed into 10 phase images. B, Time-phase images were digitalized for vessel extraction. The red columns on the right represent blood vessels at each phase. They are moving and pulsating according to the cardiac cycle. All of the 10 phase images are summed into a single matrix. C, The voxels in which the vessels are always present throughout the 10 phases can be identified as the CORE, and the surrounding voxels, as the HALO.

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    Fig 2.

    The motion map, motion index, and arterial pulse wave of the intracranial arteries. A, A posterior-cranial view of the motion map around the circle of Willis in patient 3 is shown. Red indicates the CORE, and translucent white indicates the HALO. The HALO of the bilateral P1 segment of the PCAs (white arrow) is thicker than that of the bilateral supraclinoid portion of the ICAs (double white arrows), indicating a difference in the magnitude of motion of each vessel. B, The mean ± SD of the motion index in VOI of the major cerebral vessels of the 10 subjects is shown. C, The mean ± SD of a vessel volume change in the left PCA during a single heartbeat for the 10 subjects is shown. This curve resembles a carotid artery pulse wave as well as an aortic pulse wave. D, The mean ± SD of the vessel volume change in the 10 subjects in each region of interest is shown. There is no significant difference in the amplitude among the VOI. The asterisk indicates P < .05; double asterisks, P < .001.

Tables

  • Figures
  • Patient profiles

    PatientAge (yr)SexR-R Interval Time (ms)HR (bpm)
    153M123749
    273F79875
    370F106456
    465F98261
    570F86569
    673M72982
    767F94364
    869F76978
    977M89967
    1068F64493
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American Journal of Neuroradiology: 32 (11)
American Journal of Neuroradiology
Vol. 32, Issue 11
1 Dec 2011
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Quantification of Cerebral Artery Motion during the Cardiac Cycle
T. Nishida, M. Kinoshita, H. Tanaka, T. Fujinaka, T. Yoshimine
American Journal of Neuroradiology Dec 2011, 32 (11) E206-E208; DOI: 10.3174/ajnr.A2354
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Cite this article
T. Nishida, M. Kinoshita, H. Tanaka, T. Fujinaka, T. Yoshimine
Quantification of Cerebral Artery Motion during the Cardiac Cycle
American Journal of Neuroradiology Dec 2011, 32 (11) E206-E208; DOI: 10.3174/ajnr.A2354

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