Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

N/A

Bass of skull through vertex

Arterial Phase

N/A

N/A

N/A

N/A

Venous Phase

Yes

2-5 min

N/A

Bass of skull through vertex

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: Iso-centering the patient within the gantry is key to image quality. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

CareDose

Care Dose Reference mAs

365

Time (Rotation)

1.0 sec

Average Acquisition Time

6-8 sec

Collimation

128 x 0.6mm

Pitch Value

0.55

Scan Direction

Caudocranial

Comments: CareDose is used to reduce patient dose. Decreasing the rotation time or increasing the pitch will allow for faster scan times when patient motion is a concern.

 

Reconstruction Parameters

Soft Tissue

Soft Tissue

Bone

Thin Data

Slice Thickness

5 mm

5 mm

5 mm

0.75 mm

Reconstruction Spacing

5 mm

5 mm

5 mm

0.5 mm

Reconstruction Algorithm

H30s

J30s (3)

H60s

H20s

Window Width and Level

100/30

100/30

2500/500

100/30

Reconstruction Comments: 3D MPR’s can be performed to correct positioning.

 

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: N/A