Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

N/A

N/A

N/A

N/A

Arterial Phase

N/A

N/A

N/A

N/A

Venous Phase

Yes

60 sec

Inspiration

Aortic arch through Circle of Willis

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

CareDose

Care Dose Reference mAs

185

Time (Rotation)

1.0 sec

Average Acquisition Time

5-7 sec

Collimation

128 x 0.6mm

Pitch Value

0.8

Scan Direction

Caudocranial

Comments: CareDose is used to reduce patient dose and improve image quality, specifically in the shoulder region.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 3mm

 0.75mm

 3mm

Reconstruction Spacing

 3mm

 0.5mm

 3mm

Reconstruction Algorithm

 B30s

 B20s

 B70s

Window Width and Level

 350/50

350/50

 2500/500

Reconstruction Comments: Coronal and sagittal image reconstructions are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

80-100ml

Saline Flush

N/A

Injection Rate

2-3ml/sec

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Preferably, we will inject the right arm to limit contrast artifact.