| Specific anatomic region | Carotid CTA |
| Application | Carotid stenosis |
| Author | Elliot K Fishman, MD |
| Reference Source | JHU Protocol |
| Scanner Used | 64 Slice |
| KV/Effective mAs/ Rotation time (sec) | 120/ 200 / .33 |
| Detector Collimation (mm) | .6 |
| Slice thickness (mm) | .75 |
| Pitch | .9 |
| Kernel | B20 |
| Reconstruction interval | .5 |
| Image order (acquisition) | Cr-ca |
| Oral contrast | N/A |
| IV contrast volume and type | 100 cc of Omnipaque 350 or Visipaque 320 |
| Injection rate | 4cc/sec |
| Scan delay (sec) | 15 sec empirical delay / bolus tracking |
| 3D technique used | VRT/MIP |
Comment: - Bolus tracking - ROI placed at aortic arch, threshold set at 70 HU.
- 3D mapping using both VRT and MIP are part of the standard carotid artery protocol to define the presence, location, and extent of stenosis.
- We do not routinely do a non-contrast study.
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