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

More documents

Recommendations

Info

84 Revised 7/22/09 (Gentry/Ranallo) Neck: (Add on Options) (Protocol – Adult: # 3.5 – Pediatric: # 13.5) Option: 1. Puffed Cheek: - Do after a complete routine neck CT - Ask the patient to purse their lips and gently distend the cheeks with air. Practice this before the patient gets on the table. - Scan from the genu of the mandible to the EAC during this maneuver using the same helical scan parameters as in the routine neck CT scan. - No 2D-recons but use standard and bone plus algorithms - If there are a lot of dental fillings, also do the scans with angled views - Check these scans with the radiologist before the patient leaves the CT scanner 2. Valsalva: - Do after a complete routine neck CT - Ask the patient to take a deep breath and bear down for about 10 seconds as if they were having a bowel movement. Practice this before the patient gets on the table. - Scan from upper trachea to the angle of the mandible using the same helical scan parameters as in the routine neck CT scan. - No 2D-recons but use standard and bone plus algorithms - Check these scans with the radiologist before the patient leaves the CT scanner 3. Vocalization: - Do after a complete routine neck CT - Ask the patient to take a deep breath and vocalize the vowel “EEEEEEEE” for 10 seconds during the scans. Practice this before the patient gets on the table. - Scan from upper trachea to the hyoid bone using the same scan parameters as in the routine neck CT scan. - No 2D-recons but use standard and bone plus algorithms - Check these scans with the radiologist before the patient leaves the CT scanner 4. Perfusion CT: (To be monitored by Dr Gentry or Dr Hartman) Part 1: CT Neck without contrast - Use PET CT scanner unless otherwise instructed - Do a limited noncontrast localizing scan (ROI per radiologist) - Use helical mode and no gantry angle Part 2: CT Perfusion Study: - Perfusion ROI to be selected by Dr Gentry or Dr Hartman - 8 x 2.5 mm slices through lesion (prescribed from scout and Part 1) - No gantry angle - Cine mode with 80 KVP, 200 MA, DFOV = 18 cm, 1 rotation/sec - Inject 40 ml of 370 mg/ml contrast at 4 ml per sec with a 30 ml saline push - Begin scanning 5 seconds after the start of contrast injection - Scan Phases: - Phase 1: 1 rotation/sec at 1 sec intervals for 45 seconds - Phase 2: 1 rotation/sec at 15 sec intervals 7 times for 105 seconds - Image Processing: - 1 sec images reformatted to 0.5 sec images - Perfusion Processing: - Kari Pulfer to process - Arterial and venous input functions: ROI on the ICA and EJV - Measure 25-30 mm 3 freehand volumes in solid part of tumor for BV, BF, MTT, and CP Part 3: CT Neck with contrast: (optional) - Inject an additional 40 ml of 370 mg/ml contrast at 4 ml/sec - Immediately do our routine post contrast helical neck CT scan
85 Revised 7/22/09 (Gentry/Ranallo) Scan Factors for Part 2 only: CT Neck Perfusion Study Neck: Perfusion CT (Part 2) Adult & Peds Contrast (Part 2 only) 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 then Axial Cine then Axial Cine then Axial Cine then Axial Cine then Axial Rotation Time (sec) 1.0 1.0 1.0 1.0 1.0 Detector Coverage (mm) 20 20 20 20 20 Slice Thickness (mm) 2.5 2.5 2.5 2.5 2.5 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 130 100 100 100 100 Recon 1: DFOV 18 18 18 18 18 Recon Type Standard Standard Standard Standard Standard WW/ WL 350/20 350/20 350/20 350/20 350/20
Page 1 and 2:
Name / MRN: ___________________ / _
Page 3 and 4:
Table of Contents (continued): 3 Re
Page 5 and 6:
5 Revised 7/22/09 (Gentry/Ranallo)
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Adult Head: (Axial Mode) (Protocol
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34: 33 Revised 7/22/09 (Gentry/Ranallo)
Page 53 and 54: Sinuses (Diagnostic): (Adult and Pe
Page 83: 83 Revised 7/22/09 (Gentry/Ranallo)
Page 101 and 102: 101 Revised 7/22/09 (Gentry/Ranallo
Page 107 and 108: Vascular Imaging: Stroke Deluxe: (A
Page 129 and 130: Appendix # 2 129 Revised 7/22/09 (G
Page 133 and 134: Suggestions for ROI Placement 133 R
Page 135 and 136:
135 Revised 7/22/09 (Gentry/Ranallo
Page 137 and 138:
Page 139 and 140:
1. CTA (High-res COW) 2. CTA (Strok
Page 141 and 142:
Page 143:
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?