Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Abdomen to include the entire liver

Arterial Phase

YesBolus 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

Care kV (ref. kV 120)

Effective mAs

CareDose

Quality Reference mAs

200

Time (Rotation)

0.5 sec.

Average Acquisition Time

3-4 sec.

Collimation

192 x 0.6 mm

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 (150 mAs).

 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung

Coronal

Slice Thickness

 3 mm

0.75 mm

3 mm

3 mm

Reconstruction Spacing

 3 mm

0.5 mm

3 mm

3 mm

Reconstruction Algorithm

Br40 (3)

Br36 (3)

Bl57 (3)

Br40 (3)

Window Width and Level

410/10

410/10

1600/-500

410/10

Reconstruction Comments: 

 

Reconstruction Parameters

Sagittal

Slice Thickness

 3 mm

Reconstruction Spacing

 3 mm

Reconstruction Algorithm

Br40 (3)

Window Width and Level

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.