Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Abdomen to include the entire liver

Arterial Phase

Yes

Bolus triggered

Inspiration

Diaphragm through iliac artery bifurcation

Venous Phase

Yes

60 sec

Inspiration

Diaphragm through iliac artery bifurcation

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: Non-contrast is helpful to determine tumor vascularity when high density material is present s/p TACE. If both an abdomen and pelvis are ordered, the pelvis is imaged during the venous phase. All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

CareDose

Quality Reference mAs

290

Time (Rotation)

0.5 sec

Average Acquisition Time

5-7 sec

Collimation

128 x 0.6mm

Pitch Value

0.6

Scan Direction

Craniocaudal

Comments: CareDose is used to reduce patient dose. The quality reference mAs can be lowered on non-contrast images (250 mAs).

 

Reconstruction Parameters

Soft Tissue

Thin Data

Thin Data

Lung

Slice Thickness

 3 mm

0.75 mm

 0.75mm

3 mm

Reconstruction Spacing

 3 mm

0.5 mm

 0.5 mm

3 mm

Reconstruction Algorithm

I40f (2)

I26f (2)

B20f

I70f (2)

Window Width and Level

410/10

410/10

410/10

1600/-500

Reconstruction Comments: 

 

Reconstruction Parameters

Coronal

Sagittal

Slice Thickness

 3 mm

3 mm

Reconstruction Spacing

 3 mm

3 mm

Reconstruction Algorithm

I40f (2)

I40f (2)

Window Width and Level

410/10

410/10

Reconstruction Comments: 

 

Contrast Parameters

Parameters

Contrast Type

 Non-ionic

Contrast Volume

 120 mL

Saline Flush

 N/A

Injection Rate

 4-5 mL/sec

Oral Contrast

 H2O

Contrast Volume

 1000 mL

Comments: Bolus tracking is performed off the abdominal aorta using a 230 HU trigger setting.