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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