Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

N/A

N/A

N/A

N/A

Arterial Phase

Yes

Bolus
triggered

N/A

Entire upper teeth through vertex

Venous Phase

N/A

N/A

N/A

N/A

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. 3D post-processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

Semi (ref. kV 120)

Effective mAs

CareDose

Quality Reference mAs

170

Time (Rotation)

0.5 sec.

Average Acquisition Time

3-4 sec.

Collimation

128 x 0.6 mm

Pitch Value

0.55

Scan Direction

Caudocranial
Comments: CareDose is used to reduce patient dose.

 

Reconstruction Parameters

Soft Tissue

Bone

Thin Data

Thin Data

Slice Thickness

2 mm

2 mm

0.6 mm

0.6 mm

Reconstruction Spacing

2 mm

2 mm

 0.6 mm

0.6 mm

Reconstruction Algorithm

Br40 (3)

Br59 (3)

Br40 (3)

Br59 (3)

Window Width and Level

100/30

2500/500

100/30

2500/500

Reconstruction Comments: An open DFOV is used to include the nose and posterior skull. Additional radial VRT images are also performed.

 

Reconstruction Parameters

Thin Data COW Mag

Sliding MIP Axial

Sliding MIP Coronal

Sliding MIP Sagittal

Slice Thickness

0.75 mm

16 mm

16 mm

16 mm

Reconstruction Spacing

0.5 mm

3 mm

3 mm

3 mm

Reconstruction Algorithm

Br40 (3)

Br54 (3)

Br54 (3)

Br54 (3)

Window Width and Level

700/80

700/80

700/80

700/80

Reconstruction Comments: An open DFOV is used to include the nose and posterior skull. Additional radial VRT images are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non-ionic

Contrast Volume

100 mL

Saline Flush

N/A

Injection Rate

5-6 mL/sec.

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking is performed at the level of C1-C2.