Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

N/A

Base of skull through the vertex

Arterial Phase

N/A

N/A

N/A

N/A

Venous Phase

Yes

2-5 min.

N/A

Base of skull through the vertex

Delayed Phase

N/A

N/A

N/A

N/A

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

 

Technical Parameters

Parameters

kVp

Semi (ref. kV 120)

Effective mAs

CareDose

Care Dose Reference mAs

330

Time (Rotation)

1.0 sec.

Average Acquisition Time

6-8 sec.

Collimation

128 x 0.6 mm

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

Thin Data

Bone

Slice Thickness

 5 mm

 0.75 mm

 5 mm

Reconstruction Spacing

 5 mm

 0.5 mm

 5 mm

Reconstruction Algorithm

J30s

J30s

J70h

Window Width and Level

100/30

 100/30

 2500/500

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