Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

N/A

2 cm below mandible through 2 cm above vertex

Arterial Phase

N/A

N/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

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:Isocentering the patient within the gantry is key to image quality.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 5 mm

 1 mm

 5 mm

Reconstruction Spacing

 5 mm

 1 mm

 5 mm

Reconstruction Algorithm

J30s

J30s

J70h

Window Width and Level

100/30

 100/300

 2500/500

Reconstruction Comments:An open DFOV is used to include the nose and posterior skull. Additionally, a bone thin data set is performed using 1 mm x 1 mm slices, a J70h algorithm, and a window width and level of 2500/500.

 

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.