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Research ArticleBRAIN

CT of the Head by Use of Reduced Current and Kilovoltage: Relationship between Image Quality and Dose Reduction

Mathias Cohnen, Hubert Fischer, Jürgen Hamacher, Evaldo Lins, Rolf Kötter and Ulrich Mödder
American Journal of Neuroradiology October 2000, 21 (9) 1654-1660;

Article Figures & Data

Figures

  • fig 1.
    fig 1.

    Subjective quality assessment (grade 1–6) plotted against surface dose (mGy) used in conventional scanning with the Toshiba Xpress SX, showing an inverse linear relationship. Dotted lines represent the standard error of the mean in scans with 135 kVp, full lines in scans with 120 kVp

  • fig 2.
    fig 2.

    Subjective quality assessment (grade 1–6) plotted against surface dose (mGy) used in conventional scanning with the Siemens Somatom AR.SP, showing an inverse linear relationship. Dotted lines represent the standard error of the mean in scans with 130 kVp, full lines in scans with 110 kVp

  • fig 3.
    fig 3.

    Subjective quality assessment (grade 1–7) plotted against surface dose (mGy) used in helical scanning with the Toshiba Xpress SX. Dotted lines represent standard error of the mean of scans with 120 kVp, full lines of scans with 100 kVp. The 80 kVp scan was unanimously rated as a 7

  • fig 4.
    fig 4.

    Subjective quality assessment (grade 1–7) plotted against surface dose (mGy) used in helical scanning with the Siemens Somatom AR.SP. Dotted lines represent the standard error of the mean of scans with 130 kVp, full lines of scans with 110 kVp

Tables

  • TABLE 1:
    TABLE 1:

    Technical data of CT sanner

  • TABLE 1:
    TABLE 1:

    TABLE 2A: Scan parameter, skin entrance dose, and image noise of cerebellar and supratentorial parenchyma (conventional mode, Xpress SX)

  • TABLE 1:
    TABLE 1:

    TABLE 2B: Scan parameter, skin entrance dose, and image noise of cerebellar and supratentorial parenchyma (conventional mode, somatom AR.SP)

  • TABLE 1:
    TABLE 1:

    TABLE 3A: Scan parameter, skin entrance dose, and image noise of cerebellar and supratentorial parenchyma (helical mode, Xpress SX)

  • TABLE 1:
    TABLE 1:

    TABLE 3B: Scan parameter, skin entrance dose, and image noise of cerebellar and supratentorial parenchyma (Helical mode, Somatom AR.SP)

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CT of the Head by Use of Reduced Current and Kilovoltage: Relationship between Image Quality and Dose Reduction
Mathias Cohnen, Hubert Fischer, Jürgen Hamacher, Evaldo Lins, Rolf Kötter, Ulrich Mödder
American Journal of Neuroradiology Oct 2000, 21 (9) 1654-1660;
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