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 lower extremity vasculature of affected area

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

120

Effective mAs

CareDose

Care Dose Reference mAs

250

Time (Rotation)

0.5 sec

Average Acquisition Time

20-25 sec

Collimation

128 x 0.6mm

Pitch Value

0.8

Scan Direction

Craniocaudal

Comments: CareDose is used to reduce patient dose.

 

Reconstruction Parameters

Bone

Thin Data

Soft Tissue

Slice Thickness

 3mm

 0.75mm

 5mm

Reconstruction Spacing

 3mm

 0.5mm

 5mm

Reconstruction Algorithm

 B30f

 B20f

 B70f

Window Width and Level

 410/10

410/10

 1776/176

Reconstruction Comments: Thin slice bone reonstructions (B70f) are performed when fracture is suspected. Coronal and sagittal image reconstructions are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

120ml

Saline Flush

N/A

Injection Rate

4-5ml/sec

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking is performed off the abdominal aorta using a 230 HU trigger setting.