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Research ArticleBRAIN

Intracranial Compartment Volumes in Normal Pressure Hydrocephalus: Volumetric Assessment versus Outcome

W.M. Palm, R. Walchenbach, B. Bruinsma, F. Admiraal-Behloul, H.A.M. Middelkoop, L.J. Launer, J. van der Grond and M.A. van Buchem
American Journal of Neuroradiology January 2006, 27 (1) 76-79;
W.M. Palm
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R. Walchenbach
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B. Bruinsma
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F. Admiraal-Behloul
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H.A.M. Middelkoop
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L.J. Launer
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J. van der Grond
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M.A. van Buchem
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    Fig 1.

    Intracranial semiautomated segmentation was based on axial T2 (A) and proton attenuation–weighted images. The outer contour of the subarachnoid space was manually delineated on each section (B). This was followed by an automated segmentation procedure that assigned brain tissue and CSF within this region. We determined TICV, ventricular volume (C), brain volume, and pericerebral CSF volume (D).

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    Table 1:

    Baseline MR imaging values

    Mean ± SD
    Total Intracranial volume (cc)1533.98 ± 133.32
    Ventricular volume (cc)156.25 ± 46.20
    Brain volume (cc)1176.50 ± 105.07
    Pericerebral CSF volume (cc)201.23 ± 37.89
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    Table 2:

    Mean and standard deviation of the four imaging variables, classified into improvement per symptom

    Not ImprovedImproved
    Gaitn = 4n = 19
        Ventricular volume ratio0.11 (±0.01)0.11 (±0.03)
        Brain volume ratio0.76 (±0.02)0.77 (±0.03)
        Pericerebral CSF volume ratio0.13 (±0.02)0.13 (±0.02)
        Ratio between ventricular and pericerebral CSF volume0.85 (±0.14)0.85 (±0.28)
    Cognitionn = 10n = 9
        Ventricular volume ratio0.10 (±0.03)0.11 (±0.02)
        Brain volume ratio0.77 (±0.03)0.76 (±0.02)
        Pericerebral CSF volume ratio0.13 (±0.02)0.12 (±0.02)
        Ratio between ventricular and pericerebral CSF volume0.81 (±0.28)0.96 (±0.22)
    Bladder functionn = 4n = 19
        Ventricular volume ratio0.11 (±0.03)0.10 (±0.02)
        Brain volume ratio0.76 (±0.03)0.78 (±0.02)
        Pericerebral CSF volume ratio0.13 (±0.02)0.12 (±0.01)
        Ratio between ventricular and pericerebral CSF volume0.84 (±0.29)0.91 (±0.25)
    • Note:—Ventricular volume, brain volume, and pericerebral CSF volume were converted into ratios from total intracranial volume to normalize for head size.

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American Journal of Neuroradiology: 27 (1)
American Journal of Neuroradiology
Vol. 27, Issue 1
January, 2006
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Intracranial Compartment Volumes in Normal Pressure Hydrocephalus: Volumetric Assessment versus Outcome
W.M. Palm, R. Walchenbach, B. Bruinsma, F. Admiraal-Behloul, H.A.M. Middelkoop, L.J. Launer, J. van der Grond, M.A. van Buchem
American Journal of Neuroradiology Jan 2006, 27 (1) 76-79;

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Intracranial Compartment Volumes in Normal Pressure Hydrocephalus: Volumetric Assessment versus Outcome
W.M. Palm, R. Walchenbach, B. Bruinsma, F. Admiraal-Behloul, H.A.M. Middelkoop, L.J. Launer, J. van der Grond, M.A. van Buchem
American Journal of Neuroradiology Jan 2006, 27 (1) 76-79;
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