Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

 N/A

 Inspiration

Aortic stent only

Arterial Phase

Yes

Bolus Triggered

 Inspiration

To include the entire aortic vasculature  

Venous Phase

N/A

N/A

 N/A

N/A

Delayed Phase

Yes

60 sec post    arterial phase

 Inspiration

Aortic stent only

Scan Comments: Non contrast and delayed images are necessary when following up stent placement or to r/o endovascular leak.  All scans are performed using the ALARA principle.

Technical Parameters

Parameters

kVp

120

Effective mAs

300

Time (Rotation)

0.5 sec

Average Acquisition Time

8-10 sec

Collimation

64 x 0.6mm

Pitch Value

0.8

Scan Direction

Craniocaudal

Comments:  The Effective mAs is adjusted based on a patient’s body habitus.  In addition, CareDose can be used to maintain image quality while lowering patient dose. 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung  

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

B30f

B20f

B80f

Window Width and Level

410 /10

410 /10

1600 /-500

Reconstruction Comments:  Both coronal and sagittal MPRs are performed.

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

120ml

Saline Flush

N/A

Injection Rate

3-5ml / sec

Oral Contrast

H2O

Contrast Volume

1000ml

Comments: Bolus Tracking is performed off the abdominal aorta using a 200 HU trigger setting.

Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

 N/A

 Inspiration

Aortic stent only

Arterial Phase

Yes

Bolus Triggered

 Inspiration

To include the entire aortic vasculature  

Venous Phase

N/A

N/A

 N/A

N/A

Delayed Phase

Yes

60 sec post    arterial phase

 Inspiration

Aortic stent only

Scan Comments: Non contrast and delayed images are necessary when following up stent placement or to r/o endovascular leak.  All scans are performed using the ALARA principle.

Technical Parameters

Parameters

kVp

120

Effective mAs

300

Time (Rotation)

0.5 sec

Average Acquisition Time

8-10 sec

Collimation

64 x 0.6mm

Pitch Value

0.8

Scan Direction

Craniocaudal

Comments:  The Effective mAs is adjusted based on a patient’s body habitus.  In addition, CareDose can be used to maintain image quality while lowering patient dose. 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung  

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

B30f

B20f

B80f

Window Width and Level

410 /10

410 /10

1600 /-500

Reconstruction Comments:  Both coronal and sagittal MPRs are performed.

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

120ml

Saline Flush

N/A

Injection Rate

3-5ml / sec

Oral Contrast

H2O

Contrast Volume

1000ml

Comments: Bolus Tracking is performed off the abdominal aorta using a 200 HU trigger setting.