Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

N/A

N/A

N/A

N/A

Arterial Phase

N/A

N/A

N/A

N/A

Venous Phase

Yes

40-60 sec

Inspiration

Lung apices through the diaphragm to include both adrenal glands

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: A flash spiral mode can be used to improve scan speed and limit breathing artifact if the patient is short of breath. If IV contrast is warranted, venous phase imaging is routinely performed with a 40-60 second delay. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 110)

Effective mAs

CareDose

Quality Reference mAs

100

Time (Rotation)

0.5 sec

Average Acquisition Time

2-3 sec

Collimation

192 x 0.6mm

Pitch Value

1.2

Scan Direction

Craniocaudal

Comments: CareDose is used to reduce patient dose. 100 kVp can be used for most average size patients which will significantly reduce patient dose.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung

Hi Res

Slice Thickness

 3 mm

0.75 mm

3 mm

1 mm

Reconstruction Spacing

 3 mm

0.5 mm

3 mm

10 mm

Reconstruction Algorithm

Br40 (3)

Br36 (3)

Bl57 (3)

Bl57 (3)

Window Width and Level

410/10

410/10

1600/-500

1600/-500

Reconstruction Comments: 

 

Reconstruction Parameters

Coronal

Sagittal

Slice Thickness

 3 mm

3 mm

Reconstruction Spacing

 3 mm

3 mm

Reconstruction Algorithm

Br40 (3)

Br40 (3)

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

 2-3 mL/sec.

Oral Contrast

N/A

Contrast Volume

N/A

Comments: A fixed delay of 40-60 seconds is optimal.