Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Iliac crest through the lesser trochanter of the femur

Arterial Phase

N/A

N/A

N/A

N/A

Venous Phase

N/A

N/A

N/A

N/A

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: In select cases where a vascular neoplasm is suspected, IV contrast is necessary. Also, when imaging trauma patients, it can be helpful to perform a CTA at the same time. All scans are performed using the ALARA principle.

Technical Parameters

Parameters

kVp

120

Effective mAs

Use dose reduction software

Quality Reference mAs

200

Time (Rotation)

0.5 sec

Average Acquisition Time

5-7 sec

Collimation

128 x 0.6mm

Pitch Value

0.8

Scan Direction

Craniocaudal

Comments: Dose reduction software is used to reduce patient dose.

Reconstruction Parameters

Soft Tissue

Bone

Thin Data

Thin Data

Slice Thickness

 3 mm

3 mm

 0.75 mm

0.75 mm

Reconstruction Spacing

 3 mm

3 mm

 0.5 mm

0.5 mm

Reconstruction Algorithm

B30f

B70f

B20f

B60f

Window Width and Level

410/10

1776/176

410/10

1776/176

Reconstruction Comments: 3D VRT reconstructions are also performed.

Reconstruction Parameters

Coronal

Sagittal

Coronal

Sagittal

Slice Thickness

 3 mm

3 mm

3 mm

3 mm

Reconstruction Spacing

 3 mm

3 mm

3 mm

3 mm

Reconstruction Algorithm

B30f

B30f

B70f

B70f

Window Width and Level

410/10

410/10

1776/176

1776/176

Reconstruction Comments: 3D VRT reconstructions are also performed.

Contrast Parameters

Parameters

Contrast Type

Non-ionic

Contrast Volume

120 mL

Saline Flush

N/A

Injection Rate

2-3 mL/sec

Oral Contrast

N/A

Contrast Volume

N/A

Comments: IV contrast is not routinely necessary, however, if warranted we use the above protocol.