Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Limited to the 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: IV contrast may be useful if a soft tissue mass or abscess is being evaluated. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

CareDose

Quality Reference mAs

126

Time (Rotation)

1.0 sec.

Average Acquisition Time

16-18 sec.

Collimation

16 x 0.3 mm

Pitch Value

0.85

Scan Direction

Craniocaudal

Comments: The UHR protocol is used to improve spatial resolution and fine detail. The limitation is that the scan time is significantly longer when compared to using a larger collimator size. CareDose is used to reduce patient dose.

 

Reconstruction Parameters

Bone

Thin Data

Thin Data

Thin Data

Slice Thickness

 2 mm

0.4 mm

 2 mm

0.6 mm

Reconstruction Spacing

 2 mm

0.2 mm

 2 mm

0.4 mm

Reconstruction Algorithm

Ur77 (3)

Ur77 (3)

Ur38 (3)

Ur38 (3)

Window Width and Level

1776/176

1776/176

410/10

410/10

Reconstruction Comments: As a result of using the 16 x 0.3 mm collimator, the reconstructed field of view is limited to 30cm. 3D VRT reconstructions are also performed.

 

Reconstruction Parameters

Coronal

Sagittal

Coronal

Sagittal

Slice Thickness

2 mm

2 mm

2 mm

2 mm

Reconstruction Spacing

2 mm

2 mm

2 mm

2 mm

Reconstruction Algorithm

Ur77 (3)

Ur77 (3)

Ur38 (3)

Ur38 (3)

Window Width and Level

1776/176

1776/176

410/10

410/10

Reconstruction Comments: As a result of using the 16 x 0.3 mm collimator, the reconstructed field of view is limited to 30cm. 3D VRT reconstructions are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non-ionic

Contrast Volume

80-120 mL

Saline Flush

N/A

Injection Rate

2-3 mL/sec.

Oral Contrast

N/A

Contrast Volume

N/A

Comments: IV contrast is not routinely necessary, however, if warranted we use the above protocol.