Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Nasopharynx through the diaphragm

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: A high resolution flash spiral scan may be useful if the patient is short of breath to avoid breathing artifact. All scans are performed using ALARA principle. 3D post-processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 120)

Effective mAs

CareDose

Quality Reference mAs

100

Time (Rotation)

0.5 sec.

Average Acquisition Time

4-6 sec.

Collimation

128 x 0.6 mm

Pitch Value

1.2

Scan Direction

Craniocaudal

Comments: CareDose is used to reduce patient dose and reduce image noise, specifically in the shoulder region. 100 kVp can also be used on average size patients.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung

Coronal

Slice Thickness

 3 mm

0.75 mm

 3 mm

3 mm

Reconstruction Spacing

 3 mm

0.5 mm

 3 mm

3 mm

Reconstruction Algorithm

Br40 (3)

Br36 (3)

Bl57 (3)

Br40 (3)

Window Width and Level

410/10

410/10

1600/-500

410/10

Reconstruction Comments: Coronal and sagittal image reconstructions are performed aligned to the patient’s trachea.

 

Reconstruction Parameters

Sagittal

Slice Thickness

 3 mm

Reconstruction Spacing

 3 mm

Reconstruction Algorithm

Br40 (3)

Window Width and Level

410/10

Reconstruction Comments: Coronal and sagittal image reconstructions are performed aligned to the patient’s trachea.

 

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.