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Table 1: Scan parameters for PCD-CT and EID-CT
PCD-CT EID-CT
<6 yr ≥6 yr <3 yr 3–11 yr ≥12 yr
Tube voltage (kVp) 90 (ref) 120 (ref) 120 120 120
Tube current 58 mAs (quality ref) 99 mAs (quality ref) 100 mA 120 mA 150 mA
Image quality metrics IQ 42 IQ 110 — — —
Matrix size 768 × 768 768 × 768 512 × 512 512 × 512 512 × 512
Pitch 0.85 0.85 0.531 0.531 0.531
Gantry rotation time 0.5 0.5 0.5 0.5 0.5
Collimation 120 × 0.2 mm 120 × 0.2 mm 64 × 0.675 mm 64 × 0.675 mm 64 × 0.675 mm
Kernel Hr72 Hr72 HD bone HD bone HD bone
Iterative reconstruction QIR off QIR off ASiR 30% ASiR 30% ASiR 30%
Slice thickness 0.3 mm 0.3 mm 0.625 mm 0.625 mm 0.625 mm
Interval 0.3 mm 0.3 mm 0.312 mm 0.312 mm 0.312 mm
Automatic exposure control Used Used None None None
Note:—QIR indicates Quantum Iterative Reconstruction; Ref, reference; ASiR, Adaptive Statistical Iterative Reconstruction; IQ, image quality; Hr, head regular; HD, high definition.