Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Limited to region of interest

Full Bladder

Yes

When bladder is full

Inspiration

Limited to region of interest

Venous Phase

Yes

When bladder is emptied

Inspiration

Limited to region of interest

Scan Comments: Non-contrast, full bladder, and post-void images are acquired. Scan ranges are limited to a specific area of interest to avoid unnecessary patient dose. The upper abdomen may be required in some cases. All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol.

Technical Parameters

Parameters

kVp

120

Effective mAs

Use dose reduction software

Quality Reference mAs

290

Time (Rotation)

0.5 sec

Average Acquisition Time

5-7 sec

Collimation

128 x 0.6mm

Pitch Value

0.6

Scan Direction

Craniocaudal

Comments: Dose reduction software is used to reduce patient dose. The quality reference mAs can be lowered on non-contrast and delayed images (250 mAs).

Reconstruction Parameters

Soft Tissue

Thin Data

Thin Data

Coronal

Slice Thickness

 3 mm

0.75 mm

 0.75 mm

3 mm

Reconstruction Spacing

 3 mm

0.5 mm

 0.5 mm

3 mm

Reconstruction Algorithm

I40f (2)

I26f (2)

B20f

I40f (2)

Window Width and Level

410/10

410/10

410/10

410/10

Reconstruction Comments: 

Reconstruction Parameters

Sagittal

Slice Thickness

 3 mm

Reconstruction Spacing

 3 mm

Reconstruction Algorithm

I40f (2)

Window Width and Level

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: A 30 mL nonionic contrast/500 mL saline solution is administered retrograde through a Foley catheter to fill the bladder.