Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Limited to region of interest

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: IV contrast can be useful to evaluate swelling or abscess. 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

250 / 193

Time (Rotation)

0.5 sec

Average Acquisition Time

9-10 sec

Collimation

32 x 0.6mm

Pitch Value

0.6

Scan Direction

Craniocaudal

Comments: Images are acquired using 100 / 140 kVp setting with a SN filter. The pitch value should remain below 1.0 to reduce any artifacts during post processing.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 3mm

 0.75mm

 3mm

Reconstruction Spacing

 3mm

 0.5mm

 3mm

Reconstruction Algorithm

 Q40f

 Q30f

 I70f

Window Width and Level

 410/10

 410/10

 1776/176

Reconstruction Comments: Additionally, a bone thin data set is also performed using 0.75mm x 0.5mm slices with an I70f algorithm. When generating mixed images, the DE composition is set to 0.5 and -1.0. Coronal and sagittal image reconstructions are also performed.

 

Contrast Parameters

Parameters

Contrast Type

 Non ionic

Contrast Volume

 100ml

Saline Flush

 N/A

Injection Rate

 2-3ml/sec

Oral Contrast

 N/A

Contrast Volume

 N/A

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