Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Lung apices through the diaphragm to include the adrenal glands

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:This is a low radiation dose protocol that is used for screening purposes. A high resolution flash spiral mode can be used to improve scan speed and limit breathing artifact if the patient is short of breath. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 100)

Effective mAs

CareDose

Care Dose Reference mAs

60

Time (Rotation)

0.5 sec

Average Acquisition Time

3-4 sec

Collimation

128 x 0.6mm

Pitch Value

1.0

Scan Direction

Craniocaudal

Comments: 100 kVp is used with a reduced CareDose quality ref mAs to minimize patient dose.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung

Slice Thickness

 3mm

 0.75mm

 3mm

Reconstruction Spacing

 3mm

 0.5mm

 3mm

Reconstruction Algorithm

 I30f

 I26f

 I70f

Window Width and Level

 410/10

410/10

 1600/-500

Reconstruction Comments: A high resolution recon is also performed using 1mm x 10mm slices, an I70f kernel, and a window width and level of 1600 / -500. Coronal and sagittal image reconstructions are 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.