Characteristics of CT Used for Attenuation Correction in Our Study and of Typical Diagnostic Thoracic Spiral CT at Our Institution

CharacteristicStudy CTTypical CT
X-ray tube current (mA)2.580
X-ray tube voltage (kVp)140120
Slice width (mm)103
Field of viewLeft ventricle (ascending aorta to apex)Entire thorax
Scan time5 min (13-cm average field of view)8–10 s
Axial resolution (mm)100.7
Breath-holdNo (tidal breathing)Yes
Use of intravenous contrast materialNoYes (unless contraindicated)
Radiation<1 mSv5–6 mSv