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 | Entire aortic vasculature |
Venous Phase | N/A | N/A | N/A | N/A |
Delayed Phase | N/A | N/A | N/A | N/A |
Scan Comments: Dual energy is useful for post-processing applications such as bone removal and virtual non-contrast. Utilizing these processing techniques, it is possible to eliminate the non-contrast image acquisition phase when following up aortic stent placement. All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol. |
Technical Parameters | Parameters |
kVp | 100 / 140 |
Effective mAs | Use dose reduction software |
Quality Reference mAs | 250 / 193 |
Time (Rotation) | 0.5 sec |
Average Acquisition Time | 10-15 sec |
Collimation | 32 x 0.6mm |
Pitch Value | 0.8 |
Scan Direction | Craniocaudal |
Comments: Images are acquired using 100/140 kVp setting with a Sn filter. Dose reduction software is used to reduce patient dose. The pitch value should remain below 1.0 to reduce any artifacts during post-processing. |
Reconstruction Parameters | Soft Tissue | Thin Data | Thin Data | Lung |
Slice Thickness | 3 mm | 0.75 mm | 1.5 mm | 3 mm |
Reconstruction Spacing | 3 mm | 0.5 mm | 1 mm | 3 mm |
Reconstruction Algorithm | D30f | D20f | D30f | B80f |
Window Width and Level | 410/10 | 410/10 | 410/10 | 1600/-500 |
Reconstruction Comments: When generating mixed images, the DE composition is set to 0.8. |
Reconstruction Parameters | Coronal | Sagittal |
Slice Thickness | 3 mm | 3 mm |
Reconstruction Spacing | 3 mm | 3 mm |
Reconstruction Algorithm | B30f | B30f |
Window Width and Level | 410/10 | 410/10 |
Reconstruction Comments: When generating mixed images, the DE composition is set to 0.8. |
Contrast Parameters | Parameters |
Contrast Type | Non-ionic |
Contrast Volume | 120 mL |
Saline Flush | N/A |
Injection Rate | 4-5 mL/sec |
Oral Contrast | H2O |
Contrast Volume | 1000 mL |
Comments: Bolus tracking is performed off the abdominal aorta using a 230 HU trigger setting. |