Table 1 CT scan acquisition parameters for PE assessment

CT Scanner Model

GE Revolution CT Scanner (128-slice)

Tube Voltage

100 kVp

Tube Current

200 mA

Beam Collimation

0.6 mm

Rotation Time

0.5 s

Pitch

1.2

Scan Direction

Craniocaudal

Scan Extent

Lung apex to diaphragm

Respiration Phase

Inspiration

Contrast Agent

Iohexol (Omnipaque 350 mgI/mL)

Bolus Tracking

ROI in main pulmonary artery, threshold 100 HU

Infusion Rate

5 mL/s

Catheter Size

16-gauge