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/AN/A

N/A

N/A

Venous Phase

N/A

N/A

N/A

N/A

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

Quality 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

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

Hr38 (3)

Hr38

Hr59 (3)

Hr38 (3)

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

N/A

Contrast Volume

N/A

Saline Flush

N/A

Injection Rate

N/A

Oral Contrast

N/A

Contrast Volume

N/A

Comments: IV contrast is not typically necessary for this exam.