Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

Yes

N/A

Inspiration

Carina through the apex of the heart

Arterial Phase

N/A

N/A

N/A

N/A

Venous Phase

N/A

N/A

N/A

N/A

Delayed Phase

N/A

N/A

N/A

N/A

Scan Comments: Flash spiral mode is used for calcium scoring on all patients with heart rates up to 70 bpm. For patients with heart rates greater than 70bpm, prospective sequential imaging is used instead. All scans are performed using the ALARA principle.

 

Technical Parameters

Parameters

kVp

Semi (ref. kV 120)

Effective mAs

CareDose

Care Dose Reference mAs

80

Time (Rotation)

0.25 sec

Average Acquisition Time

0.53 sec

Collimation

192 x 0.6mm

Pitch Value

3.4

Scan Direction

Craniocaudal

Comments:CareDose is used to reduce patient dose.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Lung

Slice Thickness

 3mm

 3mm

 3mm

Reconstruction Spacing

 3mm

 3mm

 3mm

Reconstruction Algorithm

 Qr36

 Qr36

 BI57

Window Width and Level

 350/50

 410/10

 1600/-500

Reconstruction Comments:Additionally, an open field soft tissue thin data set is performed using 0.75 mm x 0.5 mm slices, a Qr36f algorithm, and a window width and level of 410/10. The reconstruction field of view is limited to 35cm using the flash spiral scan mode.

 

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: IV contrast is not necessary for this exam.