| Specific Anatomic Region | Extremities | |
| Application | CTA of lower extremity | |
| Author | Elliot K. Fishman, MD | |
| Reference Source | JHU protocol | |
| Scanner Used | Siemens Somatom Sensation 16 | |
| KV / Effective mAs / Rotation time (sec) | 120 / 150 / 0.5 | |
| Detector Collimation (mm) | 1.5 or .75 | |
| Slice Thickness (mm) | 2 or 1 | |
| Feed / Rotation (mm) | 24.0 or 12 | |
| Kernel | B30s | |
| Increment (mm) | 6.0 and .5 or 1 | |
| Image Order | cr-ca | |
| Oral Contrast | None | |
| IV Contrast Volume and Type | 150 cc of Omnipaque 350 plus saline chaser | |
| Injection Rate | 3 cc/sec | |
| Scan Delay (sec) | Use either timing bolus or care bolus | |
| 3D Technique Used | VRT supplemented by MIP | |
| Comment: 1. -The CTA of the lower extremities requires careful editing of bone. for MIP. With VRT using new Inspace presets we can do quality imaging without editing in many cases. 2. We now routinely use a 30-50 cc saline chaser in all run-off studies. This is critical. 3. Reconstruction for best detail is 0.75 mm collimation, 0.75 mm slice thickness at .5 mm intervals. | ||