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

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. A 3D Post Processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

100 / 140

Effective mAs

CareDose

Care Dose Reference mAs

270 / 270

Time (Rotation)

0.28 sec

Average Acquisition Time

5-7 sec

Collimation

128 x 0.6mm

Pitch Value

0.7

Scan Direction

Caudocranial

Comments: Images are acquired using 100 / 140 kVp setting with a SN filter. A 0.28 rotation time is used to increase scan speed to avoid venous contamination.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 3mm

 0.75mm

 3mm

Reconstruction Spacing

 3mm

 0.5mm

 3mm

Reconstruction Algorithm

 D30f

 Q30f / I26f

 B70f

Window Width and Level

 350/50

350/50

 2500/500

Reconstruction Comments: When generating mixed images, the DE composition is set to 0.8. Axial, coronal, and sagittal sliding MIP image reconstructions are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

80-100ml

Saline Flush

N/A

Injection Rate

5-6ml/sec

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking is performed off the aortic arch using a 25 HU trigger setting.