Table 1

Patient and Scanning Characteristics of Patients Scanned at Study Sites That Applied a Reduced Tube Voltage of 100 kV in at Least 1 Patient

120 kV100 kVp Value
n23982
Height, m1.72 (1.63–1.79)1.70 (1.65–1.77)0.274
Weight, kg79.4 (68.0–90.0)72.0 (63.0–77.0)<0.001
BMI, kg/m226.6 (24.3–29.2)24.2 (22.8–25.9)<0.001
Heart rate, beats/min61 (55–71)62 (56–68)0.978
Sinus rhythm230 (96.2)81 (98.8)0.252
Scan length, mm129 (119–140)125 (118–134)0.112
Scanning technique0.402
 Spiral scan mode232 (97.1)78 (95.1)
 Sequential scan mode7 (2.9)4 (4.9)
ECG-dependent dose modulation229 (95.8)78 (95.1)0.791
CT scanner0.852
 General Electric 64-slice CT33 (13.8)12 (14.6)
 Siemens dual-source 64-slice CT206 (86.2)70 (85.4)

Data are presented as n (%) or median (interquartile range). General Electric Healthcare: Waukesha, Wisconsin; Siemens Medical Solutions: Forchheim, Germany.

BMI = body mass index; CT = computed tomography; ECG = electrocardiography.