Table 3.

Scanners used for deriving k-factors

Manufacturer	Scanner model	Detector Rows for Cardiac Scanning	Source	Location
GE	LightSpeed VCT XTe	64	Single	New York-Presbyterian Hospital
GE	Discovery CT750 HD	64	Single	New York-Presbyterian Hospital
Hitachi	Scenaria	64	Single	Ocean Radiology, New York
Philips	Brilliance 64	64	Single	SUNY Downstate Medical Center, New York
Philips	Brilliance iCT 256	128	Single	Cleveland Clinic, Cleveland
Siemens	SOMATOM Sensation 64	32	Single	Cleveland Clinic, Cleveland
Siemens	SOMATOM Definition AS+	64	Single	Cleveland Clinic, Cleveland
Siemens	SOMATOM Definition	2×32	Dual	Cleveland Clinic, Cleveland
Siemens	SOMATOM Definition FLASH	2×64	Dual	Cleveland Clinic, Cleveland
Siemens	SOMATOM Force*	2×96	Dual	NYU Langone Medical Center, New York
Toshiba	Aquilion 64	64	Single	New York Radiology Partners, New York
Toshiba	Aquilion Prime	80	Single	Carnegie Hill Radiology, New York
Toshiba	Aquilion ONE	320	Single	New York-Presbyterian Hospital

List of the scanners used in this study, including details of the manufacturer, model, and number of detector rows of each scanner and the location where dosimetry experiments took place for deriving the k-factors.

^*Used only for 70 kVp protocols (Online Supplemental Table 1).