Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

 N/A

 N/A

 N/A

N/A

Arterial Phase

 Yes

Bolus Trigger

N/A

Base of skull through apex

Venous Phase

 N/A

 N/A

 N/A

 N/A

Delayed Phase

 N/A

N/A

 N/A

N/A

Scan Comments: Non contrast images are performed when indicated prior to CTA.  All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

400

Time (Rotation)

0.33 sec

Average Acquisition Time

8-10 sec

Collimation

64 x 0.6mm

Pitch Value

0.6

Scan Direction

caudocranial

Comments: Isocentering the patient within the gantry is key to image quality.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

5mm

0.75mm

5mm

Reconstruction Spacing

5mm

0.5mm

5mm

Reconstruction Algorithm

B30

B20

B70

Window Width and Level

350 / 50

350 / 50

2500 / 500

Reconstruction Comments: Coronal and sagittal MPRs are performed. Additional radial MIP and VRT images are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

100 ml

Saline Flush

N/A

Injection Rate

4-6

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking is performed on the aortic arch using a 25 HU trigger.

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Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

 N/A

 N/A

 N/A

N/A

Arterial Phase

 Yes

Bolus Trigger

N/A

Base of skull through apex

Venous Phase

 N/A

 N/A

 N/A

 N/A

Delayed Phase

 N/A

N/A

 N/A

N/A

Scan Comments: Non contrast images are performed when indicated prior to CTA.  All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

400

Time (Rotation)

0.33 sec

Average Acquisition Time

8-10 sec

Collimation

64 x 0.6mm

Pitch Value

0.6

Scan Direction

caudocranial

Comments: Isocentering the patient within the gantry is key to image quality.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

5mm

0.75mm

5mm

Reconstruction Spacing

5mm

0.5mm

5mm

Reconstruction Algorithm

B30

B20

B70

Window Width and Level

350 / 50

350 / 50

2500 / 500

Reconstruction Comments: Coronal and sagittal MPRs are performed. Additional radial MIP and VRT images are also performed.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

100 ml

Saline Flush

N/A

Injection Rate

4-6

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking is performed on the aortic arch using a 25 HU trigger.