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Table 4: Radiation dose
Dual-Energy CTA TNC Brain CT
Head Head and Neck
CTDI_{vol (mGy)} 9.06 ± 0.52 10.43 ± 0.38 55.71 ± 7.28
DLP (mGy × cm) 229.11 ± 41.50 398.44 ± 21.71 773.49 ± 104.06
Note:—CTDI_vol indicates volume CT dose index; DLP, dose-length product.
	Dual-Energy CTA		TNC Brain CT
	Head	Head and Neck	TNC Brain CT
CTDI_{vol (mGy)}	9.06 ± 0.52	10.43 ± 0.38	55.71 ± 7.28
DLP (mGy × cm)	229.11 ± 41.50	398.44 ± 21.71	773.49 ± 104.06