Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

 N/A

N/A

N/A

N/A

Arterial Phase

 N/A

N/A

N/A

N/A

Venous Phase

 Yes

Patient Dependent

Inspiration

Region of interest

Delayed Phase

 N/A

N/A

N/A

N/A

Scan Comments: All scans are performed using the ALARA Principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

See chart

Care Dose Reference mAs

N/A

Time (Rotation)

1.0

Average Acquisition Time

6-8 sec

Collimation

64 x 0.6mm

Pitch Value

0.8

Scan Direction

Caudocranial

Comments: The effective mAs is adjusted using guidelines based upon the patient’s age.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

B30s

B30s

B70s

Window Width and Level

350 / 40

350 / 40

 2500 / 500

Reconstruction Comments:  Coronal and sagittal reconstructions are performed. True axial & coronal MPR images are generated when patients are unable to be positioned correctly.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

 weight based

Saline Flush

 N/A

Injection Rate

 1.5-3ml / sec

Oral Contrast

 Non ionic

Contrast Volume

 weight based

Comments: IV contrast is given when indicated to patients based upon their weight. The ratio of 1ml/lb is used up to 120ml.The scan delay is determined both in part by patient age, IV access, and injection rate.

 

The effective mAs for a pediatric neck CT is calculated using the following chart.

Age (years)

Effective mAs

 

  40-55 mAs

 3 – 6 yrs

  55-70 mAs

 6 – 12 yrs

  70-95 mAs

12yrs<

  120 mAs

 

-->

Acquisition Phase

Phase Included

Scan Delay

Respiration Phase

Anatomical Coverage

Non Contrast

 N/A

N/A

N/A

N/A

Arterial Phase

 N/A

N/A

N/A

N/A

Venous Phase

 Yes

Patient Dependent

Inspiration

Region of interest

Delayed Phase

 N/A

N/A

N/A

N/A

Scan Comments: All scans are performed using the ALARA Principle.

 

Technical Parameters

Parameters

kVp

120

Effective mAs

See chart

Care Dose Reference mAs

N/A

Time (Rotation)

1.0

Average Acquisition Time

6-8 sec

Collimation

64 x 0.6mm

Pitch Value

0.8

Scan Direction

Caudocranial

Comments: The effective mAs is adjusted using guidelines based upon the patient’s age.

 

Reconstruction Parameters

Soft Tissue

Thin Data

Bone

Slice Thickness

3mm

0.75mm

3mm

Reconstruction Spacing

3mm

0.5mm

3mm

Reconstruction Algorithm

B30s

B30s

B70s

Window Width and Level

350 / 40

350 / 40

 2500 / 500

Reconstruction Comments:  Coronal and sagittal reconstructions are performed. True axial & coronal MPR images are generated when patients are unable to be positioned correctly.

 

Contrast Parameters

Parameters

Contrast Type

Non ionic

Contrast Volume

 weight based

Saline Flush

 N/A

Injection Rate

 1.5-3ml / sec

Oral Contrast

 Non ionic

Contrast Volume

 weight based

Comments: IV contrast is given when indicated to patients based upon their weight. The ratio of 1ml/lb is used up to 120ml.The scan delay is determined both in part by patient age, IV access, and injection rate.

 

The effective mAs for a pediatric neck CT is calculated using the following chart.

Age (years)

Effective mAs

 

  40-55 mAs

 3 – 6 yrs

  55-70 mAs

 6 – 12 yrs

  70-95 mAs

12yrs<

  120 mAs