Acquisition Phase | Phase Included | Scan Delay | Respiration Phase | Anatomical Coverage |
Non Contrast | Yes | N/A | inspiration | lung apices through the bases to include the diaphragm |
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: If IV contrast is indicated, venous phase imaging is performed using a scan delay based on the patient's age, weight, and body habitus. All scans are performed using the ALARA principle. |
Technical Parameters | Parameters |
kVp | 100 |
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 determined by a weight based chart for patients under 100 lbs. CareDose can be used with a 125 reference mAs. |
Reconstruction Parameters | Soft Tissue | Thin Data | Lung |
Slice Thickness | 3mm | 0.75mm | 3mm |
Reconstruction Spacing | 3mm | 0.5mm | 3mm |
Reconstruction Algorithm | B30f | B20f | B80f |
Window Width and Level | 410 / 10 | 410 / 10 | 1600 / -500 |
Reconstruction Comments: Coronal and sagittal reconstructions are performed. A Hires 1mm x 10mm recon is also performed using a B80f reconstruction algorithm and a window width and level of 1600 / -500 |
Contrast Parameters | Parameters |
Contrast Type | Non ionic |
Contrast Volume | weight based |
Saline Flush | N/A |
Injection Rate | 1.5-3ml / sec |
Oral Contrast | N/A |
Contrast Volume | N/A |
Comments: The scan delay is determined both in part by patient age, IV access, and injection rate. |
Other Comments: The effective mAs for a pediatric Hi Res Chest 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 | Yes | N/A | inspiration | lung apices through the bases to include the diaphragm |
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: If IV contrast is indicated, venous phase imaging is performed using a scan delay based on the patient's age, weight, and body habitus. All scans are performed using the ALARA principle. |
Technical Parameters | Parameters |
kVp | 100 |
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 determined by a weight based chart for patients under 100 lbs. CareDose can be used with a 125 reference mAs. |
Reconstruction Parameters | Soft Tissue | Thin Data | Lung |
Slice Thickness | 3mm | 0.75mm | 3mm |
Reconstruction Spacing | 3mm | 0.5mm | 3mm |
Reconstruction Algorithm | B30f | B20f | B80f |
Window Width and Level | 410 / 10 | 410 / 10 | 1600 / -500 |
Reconstruction Comments: Coronal and sagittal reconstructions are performed. A Hires 1mm x 10mm recon is also performed using a B80f reconstruction algorithm and a window width and level of 1600 / -500 |
Contrast Parameters | Parameters |
Contrast Type | Non ionic |
Contrast Volume | weight based |
Saline Flush | N/A |
Injection Rate | 1.5-3ml / sec |
Oral Contrast | N/A |
Contrast Volume | N/A |
Comments: The scan delay is determined both in part by patient age, IV access, and injection rate. |
Other Comments: The effective mAs for a pediatric Hi Res Chest 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 |