European Radiology Experimental

Table 1 System parameters of the prototype silicon-based photon-counting computed tomography (Si-PCCT) and clinical energy-integrating detector CT (EIDCT) systems

From: Stent appearance in a novel silicon-based photon-counting CT prototype: ex vivo phantom study in head-to-head comparison with conventional energy-integrating CT

	Si-PCCT	EIDCT
Detector material	Silicon semiconductor	Gemstone scintillator
CTDI_vol (32 cm)	8.9 mGy	9 mGy
Scan mode	Helical	Helical
Pitch	0.99	0.98
Bowtie filter	Medium	Head (medium body)
Tube voltage	120 kVp	120 kVp
Tube current	255 mA	245 mA
Tube rotation	0.5 s	0.5 s
Focal spot size	0.6 mm	1.2 mm
z-coverage	40 mm	40 mm
Matrix	1024 × 1024	512 × 512
Field-of-view (FOV)	150 × 150 mm (150-mm FOV) 50 × 50 mm (50-mm FOV)	150 × 150 mm (150-mm FOV) 50 × 50 mm (50-mm FOV)
Pixel size	0.146 mm (150-mm FOV) 0.049 mm (50-mm FOV)	0.293 mm (150-mm FOV) 0.098 mm (50-mmFOV)
Slice thickness	0.42 mm	0.63 mm
Kernel	Bone + ASIR0	Bone + ASIR0

ASIR0 Adaptive statistical iterative reconstruction with 0% blending, CTDI_vol Volumetric computed tomography dose index, EIDCT Energy-integrating computed tomography, PCCT Photon-counting computed tomography, FOV Field-of-view

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