Table 1. Initial Patient Data.

The characteristics of the patients and scans used in the study.

Patient	Manufacturer	Machine	Sex	Age (yrs)	Dose Index (mGy)	AF?
Patient 01	Siemens	SOMATOM Force	M	62	32.05	no
Patient 02	Siemens	SOMATOM Force	F	53	20.97	no
Patient 03	Siemens	SOMATOM Force	M	55	19.94	no
Patient 04	Siemens	SOMATOM Force	F	60	21.90	no
Patient 05	Siemens	SOMATOM Force	M	71	10.97	no
Patient 06	Siemens	SOMATOM Force	M	53	16.45	no
Patient 07	GE	Discovery CT750 HD	M	91	67	yes
Patient 08	GE	Discovery CT750 HD	F	79	69.7	no
Patient 09	GE	Discovery CT750 HD	M	85	21.9	no
Patient 10	GE	Discovery CT750 HD	M	88	72.2	no
Patient 11	Toshiba	Aquillion ONE	M	80	26.7	no
Patient 12	GE	Discovery CT750 HD	F	84	73	no
Patient 13	Toshiba	Aquillion ONE	M	92	21.2	yes
Patient 14	Toshiba	Aquillion ONE	M	67	70.1	yes
Patient 15	Toshiba	Aquillion ONE	F	90	17.9	no
Patient 16	Toshiba	Aquillion ONE	M	82	14.7	yes
Patient 17	Toshiba	Aquillion ONE	F	78	27.5	yes
Patient 18	Toshiba	Aquillion ONE	F	90	26.4	no
Patient 19	Toshiba	Aquillion ONE	M	85	39.1	no
Patient 20	Toshiba	Aquillion ONE	M	81	19.3	no
Patient 21	Toshiba	Aquillion ONE	F	89	29.8	yes
Patient 22	Toshiba	Aquillion ONE	M	71	31.6	no
Patient 23	GE	Revolution CT	M	73	23.80	no
(failed)	Toshiba	Aquillion ONE	M	79	10.30	no
Mean:	-	-	-	75.51	27.59	-

AF: patient scanned while in atrial fibrillation