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Research ArticleBRAIN

Effect of Region of Interest on Interobserver Variance in Apparent Diffusion Coefficient Measures

Yasemin Bilgili and Birsen Unal
American Journal of Neuroradiology January 2004, 25 (1) 108-111;
Yasemin Bilgili
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Birsen Unal
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Article Figures & Data

Figures

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  • Fig 1.
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    Fig 1.

    ADC values obtained from the sentrium semiovale.

    A, Observer 1.

    B, Observer 2.

  • Fig 2.
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    Fig 2.

    ADC values obtained in the pons.

    A, Observer 1.

    B, Observer 2.

  • Fig 3.
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    Fig 3.

    ADC values obtained in the substantia nigra.

    A, ADC value obtained by observer 1 from the substantia nigra with a small region of interest size.

    B, ADC value obtained by observer 1 from the substantia nigra with a larger region of interest size.

Tables

  • Figures
  • Mean ADC values for each group (×10−3)

    ABCDEFGH
    Sentrium semiovale0.7330.7380.7340.7480.7450.7640.7350.770
    Frontal white matter0.8140.8060.8050.8060.7950.8190.7890.818
    Caudate nucleus0.7660.7540.7660.7640.7820.7580.7890.764
    Putamen0.7630.7350.7620.7430.7770.7650.7640.769
    Thalamus vm0.7380.7090.7450.7380.7790.7610.7680.764
    Substantia nigra0.8070.7500.7810.7690.7670.7370.7760.754
    Red nucleus0.7550.7470.7550.7590.6890.7580.7240.758
    Pons0.7120.7350.7040.7190.7020.7160.7270.723
    • Note.—A, ADC value obtained with small region of interest (ROI) size (22 ± 5 mm2) with observer 1 on the right hemisphere; B, ADC value obtained with small ROI size (22 ± 5 mm2) with observer 2 on the right hemisphere; C, ADC value obtained with larger ROI size (62 ± 6 mm2) with observer 1 on the right hemisphere; D, ADC value obtained with larger ROI size (62 ± 6 mm2) with observer 2 on the right hemisphere; E, ADC value obtained with small ROI size (22 ± 5 mm2) with observer 1 on the left hemisphere; F, ADC value obtained with small ROI size (22 ± 5 mm2) with observer 2 on the left hemisphere; G, ADC value obtained with larger ROI size (62 ± 6 mm2) with observer 1 on the left hemisphere; H, ADC value obtained with larger ROI size (62 ± 6 mm2) with observer 2 on the left hemisphere.

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American Journal of Neuroradiology: 25 (1)
American Journal of Neuroradiology
Vol. 25, Issue 1
1 Jan 2004
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Effect of Region of Interest on Interobserver Variance in Apparent Diffusion Coefficient Measures
Yasemin Bilgili, Birsen Unal
American Journal of Neuroradiology Jan 2004, 25 (1) 108-111;

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Effect of Region of Interest on Interobserver Variance in Apparent Diffusion Coefficient Measures
Yasemin Bilgili, Birsen Unal
American Journal of Neuroradiology Jan 2004, 25 (1) 108-111;
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