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Table 1: Scanning parameters for postoperative unenhanced dual-energy brain CT and follow-up unenhanced brain CT
DECT SECT
Scanning technique Spiral Spiral
Scan direction Caudocranial Caudocranial
kVp 80/140 120
mAs ref 310/155 390
Collimation (mm) 40 × 0.6 128 × 0.6
Rotation time (sec) 0.5 1
Pitch 0.7 0.55
CARE Dose 4D^{^a} On On
CARE-kV^{^a} Not available Off
X-CARE^{^a} Not available On
Kernel D34f H40s
Note:—SECT indicates single-energy CT; ref, reference.
↵a Siemens.

	DECT	SECT
Scanning technique	Spiral	Spiral
Scan direction	Caudocranial	Caudocranial
kVp	80/140	120
mAs ref	310/155	390
Collimation (mm)	40 × 0.6	128 × 0.6
Rotation time (sec)	0.5	1
Pitch	0.7	0.55
CARE Dose 4D^{^a}	On	On
CARE-kV^{^a}	Not available	Off
X-CARE^{^a}	Not available	On
Kernel	D34f	H40s