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. 2014 Jul;35(7):1281–1287. doi: 10.3174/ajnr.A3861

Table 4:

Radiation dose for the ULDCT, LDCT, and SDCT

SDCT-ULDCT (100% - [ULDCT/SDCT] · 100) SDCT-LDCT (100% - [LDCT/SDCT] · 100) LDCT-ULDCT (100% - [ULDCT/LDCT] · 100)
Percentage reduction
    Difference CTDIvol
        66% 10% 62%
        65% 20% 56%
        68% 24% 57%
    Difference DLP
        67% 15% 61%
        67% 18% 61%
        67% 21% 59%
    Difference ED
        67% 15% 61%
        67% 17% 60%
        68% 21% 59%

Note:—DLP indicates dose-length product; ED, effective dose.