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 | Abdomen to include the specific 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 | See chart |
Time (Rotation) | 0.33 sec |
Average Acquisition Time | 4-5 sec |
Collimation | 64 x 0.6mm |
Pitch Value | 2.5-3.0 |
Scan Direction | Craniocaudal |
Comments: The effective mAs is adjusted using guidelines based upon the patient's body habitus, weight, and age. |
Reconstruction Parameters | Soft Tissue | Thin Data | Lung |
Slice Thickness | 3mm | 1.5mm | 3mm |
Reconstruction Spacing | 3mm | 1.0mm | 3mm |
Reconstruction Algorithm | B30f | B20f | B80f |
Window Width and Level | 410 / 10 | 410 / 10 | 1600 / -500 |
Reconstruction Comments: Coronal and sagittal reconstructions are performed. |
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: The scan delay is determined both in part by patient age, IV access, and injection rate. |
Other Comments: IV contrast is given when indicated to patients based upon their weight. The ratio of 1ml/lb is used up to 120ml. Images should be acquired during peak portal venous enhancement, which will vary based upon patient age, weight, and IV access. Oral contrast is mixed using 10ml of Omnipaque 350 mixed into 500ml of any non carbonated beverage. The amount of oral contrast is determined by the patient's weight:
Weight (kg) | Contrast |
1-7 kg | 40-60 ml |
8-11 kg | 110-160 ml |
12-15 kg | 165-240 ml |
16-42 kg | 250-360 ml |
Over 42 kg | 480 ml+ |
The effective mAs for a pediatric abdomen CT is calculated using the following chart.
Weight (kg) | Effective mAs | CareDose |
<15 | 45-65 mAs | |
15-24 | 70-85 mAs | |
25-34 | 85-95 mAs | |
35-44 | 100-110 mAs | |
45< | CareDose | 125 ref 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 | Abdomen to include the specific 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 | See chart |
Time (Rotation) | 0.33 sec |
Average Acquisition Time | 4-5 sec |
Collimation | 64 x 0.6mm |
Pitch Value | 2.5-3.0 |
Scan Direction | Craniocaudal |
Comments: The effective mAs is adjusted using guidelines based upon the patient's body habitus, weight, and age. |
Reconstruction Parameters | Soft Tissue | Thin Data | Lung |
Slice Thickness | 3mm | 1.5mm | 3mm |
Reconstruction Spacing | 3mm | 1.0mm | 3mm |
Reconstruction Algorithm | B30f | B20f | B80f |
Window Width and Level | 410 / 10 | 410 / 10 | 1600 / -500 |
Reconstruction Comments: Coronal and sagittal reconstructions are performed. |
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: The scan delay is determined both in part by patient age, IV access, and injection rate. |
Other Comments: IV contrast is given when indicated to patients based upon their weight. The ratio of 1ml/lb is used up to 120ml. Images should be acquired during peak portal venous enhancement, which will vary based upon patient age, weight, and IV access. Oral contrast is mixed using 10ml of Omnipaque 350 mixed into 500ml of any non carbonated beverage. The amount of oral contrast is determined by the patient's weight:
Weight (kg) | Contrast |
1-7 kg | 40-60 ml |
8-11 kg | 110-160 ml |
12-15 kg | 165-240 ml |
16-42 kg | 250-360 ml |
Over 42 kg | 480 ml+ |
The effective mAs for a pediatric abdomen CT is calculated using the following chart.
Weight (kg) | Effective mAs | CareDose |
<15 | 45-65 mAs | |
15-24 | 70-85 mAs | |
25-34 | 85-95 mAs | |
35-44 | 100-110 mAs | |
45< | CareDose | 125 ref mAs |