CT Protocols: (Brain, ENT, Spine, Vascular) - Department of Radiology

3D CT: (Craniosynostosis, Congenital Facial Anomaly)
(Protocol – Adult: # 1.5 – Pediatric: # 11.9 & 11.10)
44 Revised 7/22/09 (Gentry/Ranallo)
Billing:
Setup:
DFOV:
Contrast:
Patient Age:
Other Info:
1. CT Head without contrast
2. 3D CT Charge
1. Patient Supine, AP and lateral scouts, no gantry angle
2. Use 64 slice scanners if possible
3. Remove all metallic and high-density objects from the scanning area.
4. Patient Positioning: Tilt the patient’s head so that a line connecting the lateral
canthus and the EAC is perpendicular to the CT tabletop. (see head CT protocol)
5. Scanning begins below the genu of the mandible all the way through the top of the
head (Get 1-2 air scans above the head and below the chin to allow the 3D program to show
the entire head and mandible without artifacts)
Preferred 20 cm (Range 18-22 cm) Must include the entire head, face, and mandible
1. Only done without contrast.
Choose the CT scan factors on the scanner for the proper age range of the patient
1. Child: (3 – 6 years)
2. Infant: (0 – 3 years)
1. Send the following source images to PACS: Recon 1: 5 mm slice thickness
standard images (2.5 mm Plus recon for infants), and Recon 2: 1.25 mm slice
thickness bone images.
2. Do not send the 0.625 mm (Recon 3) bone images to PACS.
3D Reconstructions:
1. Do 3D Reconstructions only from the Recon 3 thin bone images
2. Cut away as much of the c-spine as possible
3. Please perform three 360 degree rotations at 10 degree intervals as follows
a. From a right lateral view = rotate horizontally for 360 degrees
b. From an AP view = rotate vertically for 360 degrees
c. From a Water’s type view = rotate horizontally for 360 degrees (note: to get a
Water’s type projection rotate the patient’s nose upward about 20 degrees)
4. Networking all 3D images to ALI Store
5. Make sure the 3D request is placed in the 3D slot on the wall in the E3/3 control
room!