. Author manuscript; available in PMC: 2020 Mar 1.

Published in final edited form as: Invest Radiol. 2019 Mar;54(3):129–137. doi: 10.1097/RLI.0000000000000524

Table 1.

Acquisition and reconstruction parameters for the conventional energy integrating detector (EID) CT system and the prototype photon counting detector (PCD) CT system in this study. (WFBP = weighted filtered back projection; ADMIRE = advanced modeled iterative reconstruction; SAFIRE = sinogram-affirmed iterative reconstruction).

CT System	EID-CT
Number of patients scanned	22
Scanner platform	Somatom Definition AS+ Somatom Definition Flash Somatom Definition Edge Somatom Definition Force	Somatom Definition CounT
Collimation	128 × 0.6 mm (AS+, Flash, Edge) 192 × 0.6 mm (Force)	48 × 0.25 mm
Rotation time	0.25s to 0.5s	0.5s
Tube potential (kV)	120	140
Quality reference mAs	70 (0.5s) or 140 (0.25s)	NA
Mean CTDIvol(32cm)	13.58 mGy (25–75^th percentile 10.95–16.05)	13.37 mGy (25–75^th percentile 10.63–15.45)
Energy thresholds	NA	25, 75 keV
Reconstruction technique	WFBP (AS+, Flash and Edge) ADMIRE (Force)	WFBP SAFIRE
Slice thickness/increment (mm)	1.5/1.0	1.5/1.0
Reconstruction field-of-view (mm)	275	275
Reconstruction kernel/matrix size	B46/512×512 (WFBP) B46/1024×1024 (WFBP) Bv49/512×512 (ADMIRE-Force only) Bv49/1024×1024 (ADMIRE-Force only)	B46/1024×1024 (WFBP) Q65/1024×1024 (SAFIRE)