Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

N/A

 N/A

 N/A

N/A

Arterial Phase

 Yes

Bolus Triggered

 inspiration

The top of the head through the entire aortic vasculature 

Venous Phase

N/A

 N/A

 N/A

N/A

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: This protocol is used to evaluate the vasculature of patients with connective tissue disorders to r/o aneurysm, dissection or vascular anomaly.  The protocol is often modified and limited to a specific area of interest.  All scans are performed using the ALARA principle.

Technical Parameters

Parameters

kVp

120

Effective mAs

350

Care Dose Reference mAs

N/A

Time (Rotation)

0.33 sec

Average Acquisition Time

15 sec

Collimation

64 x 0.6mm

Pitch Value

2.0

Scan Direction

Craniocaudal

Comments:  A fixed mAs setting is used to limit noise and artifact specifically in the brain.

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: Coronal and sagittal MPRs are performed.

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

80-100ml

Saline Flush

N/A

Injection Rate

4-6ml/sec

Oral Contrast

H2O

Contrast Volume

1000ml

Comments: Bolus tracking is performed on the aortic arch using a trigger threshold of 50HU.

Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

N/A

 N/A

 N/A

N/A

Arterial Phase

 Yes

Bolus Triggered

 inspiration

The top of the head through the entire aortic vasculature 

Venous Phase

N/A

 N/A

 N/A

N/A

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: This protocol is used to evaluate the vasculature of patients with connective tissue disorders to r/o aneurysm, dissection or vascular anomaly.  The protocol is often modified and limited to a specific area of interest.  All scans are performed using the ALARA principle.

Technical Parameters

Parameters

kVp

120

Effective mAs

350

Care Dose Reference mAs

N/A

Time (Rotation)

0.33 sec

Average Acquisition Time

15 sec

Collimation

64 x 0.6mm

Pitch Value

2.0

Scan Direction

Craniocaudal

Comments:  A fixed mAs setting is used to limit noise and artifact specifically in the brain.

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: Coronal and sagittal MPRs are performed.

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

80-100ml

Saline Flush

N/A

Injection Rate

4-6ml/sec

Oral Contrast

H2O

Contrast Volume

1000ml

Comments: Bolus tracking is performed on the aortic arch using a trigger threshold of 50HU.