Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

N/A

Limited to region of interest

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: Gout studies are typically performed on the patient’s affected joints and modified for each specific region of interest.  All scans are performed using the ALARA principle. A 3D Post Processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

80 / 140

Effective mAs

CareDose

Care Dose Reference mAs

211/106

Time (Rotation)

1.0 sec

Average Acquisition Time

20-25 sec

Collimation

40 x 0.6mm

Pitch Value

0.7

Scan Direction

Craniocaudal

Comments: Images are acquired using 80 / 140 kVp setting with a SN filter. The pitch value should remain below 1.0 to reduce any artifacts during post processing.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

 0.75mm

N/A

 0.75mm

Reconstruction Spacing

0.5mm

N/A

 0.5mm

Reconstruction Algorithm

D30s

N/A

 B70s

Window Width and Level

 1400/300

N/A

 1776/176

Reconstruction Comments: When generating mixed images, the DE composition is set to 0.4. 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.