Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast (Supine)

Yes

N/A

Expiration

Entire colon

Non Contrast (Prone)

Yes

N/A

Expiration

Entire Colon

Non Contrast (Post-tube)

Yes

N/A

Expiration

Rectum only

Scan Comments: Images are acquired with the patient positioned supine and prone after the colon has been filled with carbon dioxide. Additional images of the rectum only are acquired following tube removal. All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol.

Technical Parameters

Parameters

kVp

120

Effective mAs

50

Quality Reference mAs

N/A

Time (Rotation)

0.5 sec

Average Acquisition Time

6-8 sec

Collimation

128 x 0.6mm

Pitch Value

0.8

Scan Direction

Craniocaudal

Comments: 

Reconstruction Parameters

Soft Tissue

Thin Data

Coronal

Sagittal

Slice Thickness

5 mm

1 mm

5 mm

5 mm

Reconstruction Spacing

5 mm

0.7 mm

5 mm

5 mm

Reconstruction Algorithm

B30f

B30f

B30f

B30f

Window Width and Level

410/10

410/10

410/10

410/10

Reconstruction Comments: 

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: Images are acquired following maximum inflation of the colon with carbon dioxide.