Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

N/A

2cm below mandible through 2cm 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

120

Effective mAs

CareDose

Care Dose Reference mAs

200

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.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 2mm

 0.75mm

 2mm

Reconstruction Spacing

 2mm

 0.5mm

 2mm

Reconstruction Algorithm

 H30s / J30s

 J30s

 J70h

Window Width and Level

 350/50

 350/50

 2500/500

Reconstruction Comments: An open DFOV is used to include the nose and posterior skull. Additionally, soft tissue and bone thin data sets are performed using 0.6mm x 0.6mm slices with H30s and H60s algorithms, respectively. Coronal and sagittal image reconstructions are also performed. 3D reconstructions (VRT) are performed in these cases.

 

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.