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. Isocentering the patient within the gantry is key to image quality. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 120)

Effective mAs

CareDose

Care Dose Reference mAs

116

Time (Rotation)

1.0 sec.

Average Acquisition Time

4-5 sec.

Collimation

128 x 0.6 mm

Pitch Value

0.8

Scan Direction

Caudocranial

Comments: CareDose is used to reduce patient dose.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 3 mm

 0.75 mm

 3 mm

Reconstruction Spacing

 3 mm

 0.5 mm

 3 mm

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 performed using 0.75 mm x 0.5 mm slices, a J30s algorithm, and a window width and level of 350/20. 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.