Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Scan range to include kidneys only

Arterial Phase

Yes

Bolus triggered

Inspiration

Scan range to include diaphragm through pubic symphysis

Venous Phase

Yes

60 sec

Inspiration

Scan range to include diaphragm through iliac crest

Delayed Phase

Yes

5 min

Inspiration

Scan range to include kidneys through bladder

Scan Comments: Scan ranges are limited to a specific area of interest to avoid unnecessary patient dose. The noncontrast phase can often be excluded for F/U studies. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

CareDose

Care Dose Reference mAs

290

Time (Rotation)

0.5 sec

Average Acquisition Time

6-8 sec

Collimation

128 x 0.6mm

Pitch Value

0.6

Scan Direction

Craniocaudal

Comments: The CareDose reference mAs can be lowered on noncontrast and delayed imaging.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung

Slice Thickness

 3mm

 0.75mm

 3mm

Reconstruction Spacing

 3mm

 0.5mm

 3mm

Reconstruction Algorithm

 I40f

 B20f / I26f

 I70f

Window Width and Level

 410/10

410/10

 1600/-500

Reconstruction Comments: 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

 H2O

Contrast Volume

 1000ml

Comments: Bolus tracking is used for arterial phase images using a trigger value of 230HU.