Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

N/A

Limited to area 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: If IV contrast is indicated, venous phase imaging is performed using a scan delay based on the patient’s age, weight, and body habitus. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

100

Effective mAs

CareDose

Care Dose Reference mAs

150

Time (Rotation)

1.0 sec

Average Acquisition Time

5 sec

Collimation

128 x 0.6mm

Pitch Value

0.8

Scan Direction

Craniocaudal

Comments: CareDose is used to limit patient exposure. 

 

Reconstruction Parameters

Bone

Thin Data

Soft Tissue

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

I70h

I70h

I30s

Window Width and Level

1776/176

1776/176

410/10

Reconstruction Comments:  Additionally, a soft tissue thin data set is also performed using 0.75mm x 0.5mm slices with an I26s algorithm and a window width and level of 410/10. Coronal and sagittal soft tissue and bone image reconstructions are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

Weight based

Saline Flush

N/A

Injection Rate

1.5-3ml/sec

Oral Contrast

N/A

Contrast Volume

N/A

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