Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Hold

Maxillary sinus through frontal sinus

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: IV contrast is not routinely necessary. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 100)

Effective mAs

CareDose

Care Dose Reference mAs

80

Time (Rotation)

1.0 sec

Average Acquisition Time

3-5 sec

Collimation

128 x 0.6mm

Pitch Value

0.8

Scan Direction

Caudocranial

Comments: Isocentering the patient within the gantry is key to image quality. 100 kVp is used to reduce patient exposure. CareDose is used to limit patient exposure.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

J30s

J70h

J70h

Window Width and Level

350/20

2500/500

 2500/500

Reconstruction Comments: Additionally, a soft tissue thin data set is also performed using 0.75mm x 0.5mm slices with a J30s algorithm. Coronal and sagittal image reconstructions are also performed.

 

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.