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

Appendix # 3
CT Perfusion Protocol: (Specific Instructions):
130 Revised 7/22/09 (Gentry/Ranallo)
Billing:
Setup:
1. Perfusion and contrast used
1. Patient Supine, AP and lateral scouts, no gantry tilt
2. Patient Positioning: Tilt the patient’s head so that a line connecting the lateral canthus of
the eye and the EAC is perpendicular to the CT tabletop (see head CT protocol).
3. Usually done in conjunction with a CT/CTA of the Head or CT/CTA of Head/Neck
Exam:
DFOV:
CT Perfusion
1. Scan Type
2. Cine Duration
3. Perfusion Area
4. Contrast
5. Injection Rate
patient)
6. Prep Delay
7. Perfusion Slabs
Preferred 20 cm (Range 18-22 cm)
Perfusion Locations: (See next Page)
Cine
45 seconds
(next page)
40 ml of 370 nonionic contrast with 30 ml saline chase
Adult: 5 ml per sec
Pediatric: 3-5 ml per sec (Depends on size of needle and age of
5 seconds
Use maximum number (4-8-16) of contiguous 5 mm slabs allowed
by each specific CT scanner (use toggle/shuttle mode if possible)
Perfusion Post Processing: (see Appendix 5 for further details):
1. Prospectively reconstruct the images to .5 seconds. This is found under thick/speed - (Go
under show recon 2).
2. When you are in recon 2, enter the RAS coordinates manually.
3. Network raw perfusion images to CTAW3 & ALI Source – DO Not send the perfusion part to
ALI store
CT Perfusion:
Adult and Pediatric
Contrast
CT 1 CT 2 CT 3 CT 4 & ER CT East & RP CT
Scanner GE LS Xtra GE LS 16 GE LS 16 Pro GE LS VCT 64 GE LS 8
Scan Type Cine Cine Cine Cine Cine
Rotation Time (sec) 1.0 1.0 1.0 1.0 1.0
Detector Coverage (mm) 20 20 20 40 20
Slice Thickness (mm) 5 5 5 5 5
Cine Time Between Images 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec
Scan FOV Head Head Head Head Head
kV 80 80 80 80 80
mA Adults 250 200 200 200 200
mA Peds < 6 y/o 190 150 150 150 150
Cine Duration (sec) 45 45 45 45 45
Recon 1:
DFOV 22 22 22 22 22
Recon Type Standard Standard Standard Standard Standard
WW/ WL 350/20 350/20 350/20 350/20 350/20