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

Lung apices through the diaphragm

Venous Phase

N/A

N/A

N/A

N/A

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol.

 

Technical Parameters

Parameters

kVp

Care kV (ref. kV 120)

Effective mAs

CareDose

Quality Reference mAs

240

Time (Rotation)

0.28 sec.

Average Acquisition Time

HR Dependent

Collimation

128 x 0.6 mm

Pitch Value

HR Dependent

Scan Direction

Craniocaudal

Comments: Both the pitch and the scan time will vary based upon the patient's heart rate. ECG dose modulation is always performed to limit patient exposure. CareDose is used to reduce patient dose. 

 

Reconstruction Parameters

Best Phase Heart Mag

Soft Tissue Open Field

Thin Data Open Field

Lung Open Field

Slice Thickness

0.75 mm

3 mm

 0.75 mm

3 mm

Reconstruction Spacing

0.5 mm

3 mm

 0.5 mm

3 mm

Reconstruction Algorithm

Bv38 (3)

Bv40 (3)

Bv38 (3)

Bl57 (3)

Window Width and Level

500/100

410/10

410/10

1600/-500

Reconstruction Comments: A 1.0 mm x 0.6 mm multiphase reconstruction is generated across the ECG pulsing range every 5-10% of the R-R interval. An additional smaller DFOV reconstruction that only includes the heart and aorta will increase spatial resolution of the coronary vessels.

 

Reconstruction Parameters

Multiphase Heart Mag

Coronal Open Field

Sagittal Open Field

Slice Thickness

1 mm

3 mm

3 mm

Reconstruction Spacing

0.6 mm

3 mm

3 mm

Reconstruction Algorithm

Bv38 (3)

Bv40 (3)

Bv40 (3)

Window Width and Level

500/100

410/10

410/10

Reconstruction Comments: A 1.0 mm x 0.6 mm multiphase reconstruction is generated across the ECG pulsing range every 5-10% of the R-R interval. An additional smaller DFOV reconstruction that only includes the heart and aorta will increase spatial resolution of the coronary vessels.

 

Contrast Parameters

Parameters

Contrast Type

Non-ionic

Contrast Volume

120 mL

Saline Flush

30 mL

Injection Rate

5-7 mL/sec.

Oral Contrast

N/A

Contrast Volume

N/A

Comments: Bolus tracking is used ideal with a 230 HU trigger value on the ascending aorta. A saline flush can be used to soften the SVC and limit beam hardening artifact.