Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Limited to the region of interest

Arterial Phase

N/AN/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: IV contrast can be useful to evaluate swelling or abscess. All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

100/Sn150

Effective mAs

CareDose

Quality Reference mAs

190/380

Time (Rotation)

0.5 sec.

Average Acquisition Time

15-17 sec.

Collimation

128 x 0.6 mm

Pitch Value

0.5

Scan Direction

Craniocaudal
Comments: Images are acquired using 100/150 kVp setting with a Sn filter. CareDose is used to reduce patient dose. The pitch value should remain below 1.0 to reduce any artifacts during post-processing.

 

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

Qr44 (3)

Br64 (3)

Qr44 (3)

Br64 (3)

Window Width and Level

410/10

1776/176

410/10

1776/176

Reconstruction Comments: When generating mixed images, the DE composition is set to 0.5 and -1.0. Coronal and sagittal image reconstructions are also performed (3 mm x 3 mm, Qr44, 410/10 and 3 mm x 3 mm, Br64, 1776/176).

 

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

Qr44 (3)

Br64 (3)

Qr44 (3)

Br64 (3)

Window Width and Level

410/10

1776/176

410/10

1776/176

Reconstruction Comments: When generating mixed images, the DE composition is set to 0.5 and -1.0. Coronal and sagittal image reconstructions are also performed (3 mm x 3 mm, Qr44, 410/10 and 3 mm x 3 mm, Br64, 1776/176).

 

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.