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Data of standard- and low-dose cervical spine trauma MDCT examinations
VariableStandard DoseLow Dose: High Tube VoltageLow Dose: Low Tube Voltage
Tube typeFixed tube currentTube current modulationTube current modulation
No. of patients517070
Effective dose, mSv*3.75 ± 0.251.57 ± 0.381.08 ± 0.28
Image noise, HU*14.82 ± 5.4617.46 ± 6.5019.72 ± 6.17
Image quality scores (0–4)*
    Reviewer 13.02 ± 0.623.04 ± 0.512.95 ± 0.65
    Reviewer 23.02 ± 0.473.06 ± 0.522.94 ± 0.56
    Reviewer 32.92 ± 0.642.99 ± 0.632.81 ± 0.62
    Reviewer 42.82 ± 0.652.90 ± 0.712.70 ± 0.67
  • Note:—Reviewers 1 and 2 are experienced radiologists; reviewers 3 and 4 are a second-year and a first-year resident, respectively.
  • * Data are mean ± SD.