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Table 1: PCD-CT versus EID-CT scan and reconstruction parameters
Parameter EID PCD
Scanner model Force Alpha
kV 100/Sn150 kV 120 kV (manual kV)
QRM/Effective mAs/IQ-level Head/Neck CTA: 360/225 (AEC on), Head CTA: 280/175 (AEC off) 230 (CAREkeV IQ Level)
Collimation (mm) 192 × 0.6 120 × 0.2
CTDIvol (mGy) 37.1 ± 4.7 36.1 ± 4.0
Section/Increment (mm) 0.6/0.4 (mixing ratio 0.5) 0.6/0.4; 0.2/0.2
Kernel Qr54 Qr56; Qr89
Matrix 1024 1024
Iterative reconstruction and noise reduction ADMIRE-3 Quantum iterative reconstruction Strength 3; UHR-CNN
Contrast injection Ominipaque 350, 100 mL at 4 mL/s, followed by 35 mL saline at 4 mL/s Ominipaque 350, 100 mL at 4 mL/s, followed by 35 mL saline at 4 mL/s
Note:—IQ indicates image quality (a PCD setting); AEC, automatic exposure control.

Parameter	EID	PCD
Scanner model	Force	Alpha
kV	100/Sn150 kV	120 kV (manual kV)
QRM/Effective mAs/IQ-level	Head/Neck CTA: 360/225 (AEC on), Head CTA: 280/175 (AEC off)	230 (CAREkeV IQ Level)
Collimation (mm)	192 × 0.6	120 × 0.2
CTDIvol (mGy)	37.1 ± 4.7	36.1 ± 4.0
Section/Increment (mm)	0.6/0.4 (mixing ratio 0.5)	0.6/0.4; 0.2/0.2
Kernel	Qr54	Qr56; Qr89
Matrix	1024	1024
Iterative reconstruction and noise reduction	ADMIRE-3	Quantum iterative reconstruction Strength 3; UHR-CNN
Contrast injection	Ominipaque 350, 100 mL at 4 mL/s, followed by 35 mL saline at 4 mL/s	Ominipaque 350, 100 mL at 4 mL/s, followed by 35 mL saline at 4 mL/s