Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

N/A

 N/A

 N/A

N/A

Arterial Phase

 Yes

Bolus triggered

 Inspiration

Entire neck to include aortic arch through Circle of Willis

Venous Phase

N/A

N/A

N/A

N/A

Delayed Phase

N/A

N/A

N/A

N/A

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

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 100)

Effective mAs

CareDose

Care Dose Reference mAs

200

Time (Rotation)

0.5 sec

Average Acquisition Time

3-5 sec

Collimation

128 x 0.6mm

Pitch Value

1.4

Scan Direction

Caudocranial

Comments: CareDose is used to limit patient exposure and improve image quality through the shoulder region.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

I30f

I30f

I70f

Window Width and Level

350/50

350/50

2500/500

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

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

Weight based

Saline Flush

N/A

Injection Rate

Patient size and weight dependent

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking may be useful to determine peak contrast enhancement.