CT Protocols: (Brain, ENT, Spine, Vascular) - Department of Radiology
CT Protocols: (Brain, ENT, Spine, Vascular) - Department of Radiology CT Protocols: (Brain, ENT, Spine, Vascular) - Department of Radiology
42 Revised 7/22/09 (Gentry/Ranallo) Smart Prep Prep Over mA Monitoring Delay (sec) Monitoring ISD (sec) Enhancement Threshold Diagnostic Delay (sec) Aortic Arch 40 10.0 2.5 50 8.0 Maxillofacial Trauma: Pediatric Infant (0 – 3 yr) Scanner GE LS Xtra GE LS 16 GE LS 16 Pro GE LS VCT 64 GE LS 8 Scan Type Helical Helical Helical Helical Helical Rotation Time (sec) 0.6 0.7 0.5 0.5 0.8 Detector Coverage (mm) Beam Collimation (mm) 10 10 10 20 10 Detector Rows 16 16 16 16 8 Pitch 0.562 0.562 0.562 0.531 0.625 Speed (mm/rot) 5.625 5.625 5.625 10.62 6.25 Detector Configuration 16 x 0.625 16 x 0.625 16 x 0.625 64 x 0.625 8 x 1.25 Slice Thickness (mm) 1.25 1.25 1.25 1.25 1.25 Interval (mm) 0.75 0.75 0.75 0.625 0.75 Scan FOV Head Head Head Small Head Head kV 80 80 80 80 80 Smart mA/ Auto mA Range 110-570 80-390 110-550 100-520 80-390 Noise Index 5.1 5.1 5.1 5.1 5.1 (Manual mA) 370 260 360 340 260 Recon 1: DFOV 17.2 17.2 17.2 17.2 17.2 Recon Type Standard Standard Standard Standard Standard WW/ WL 400/50 400/50 400/50 400/50 400/50 Recon Option Plus Plus Plus Full Plus Recon Option Recon 2: IQ Enhance DFOV 17.2 17.2 17.2 17.2 17.2 Recon Type Bone Plus Bone Plus Bone Plus Bone Plus Bone Plus WW/ WL 3000/300 3000/300 3000/300 3000/300 3000/300 Recon Option Plus Plus Plus Full Plus Recon Option Non-Contrast or Contrast CT 1 CT 2 CT 3 CT 4 & ER CT East & RP CT IQ Enhance Slice Thickness (mm) 0.625 0.625 0.625 0.625 1.25 Interval (mm) 0.625 0.625 0.625 0.625 0.75
43 Revised 7/22/09 (Gentry/Ranallo) Maxillofacial Trauma: (Routine plus 3D) (Protocol – Adult: # 2.5b – Pediatric: # 12.9 & 12.10) Billing: Setup: Exam: 1. CT Maxi-face without 2. 3D CT charge 1. Patient Supine, AP and lateral scouts, no gantry angle 2. Remove all metallic and high-density objects from the scanning area. 3. 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). 4. Scanning begins just below the genu of the mandible to the top of the frontal sinuses Part 1: Routine Maxiface Trauma Protocol 1. Do a routine maxillofacial trauma protocol 2. Scanning begins at the bottom of the mandible to the top of the frontal sinus (get one air scan below chin to allow the 3D to show the entire mandible without artifacts) Part 2: 3D Exam Post-Processing: 1. Cut away as much of the c-spine as possible 2. 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) Other Info: 1. Do 2 mm x 2 mm 2D-Reformations as in the routine maxifacial protocol 2. Network the 2D and 3D images to ALI Store 3. Place the 3D request in the 3D slot on the wall in the E3/3 control room!
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42 Revised 7/22/09 (Gentry/Ranallo)<br />
Smart Prep<br />
Prep Over<br />
mA<br />
Monitoring Delay<br />
(sec)<br />
Monitoring<br />
ISD (sec)<br />
Enhancement<br />
Threshold<br />
Diagnostic Delay<br />
(sec)<br />
Aortic Arch 40 10.0 2.5 50 8.0<br />
Maxill<strong>of</strong>acial Trauma:<br />
Pediatric Infant (0 – 3 yr)<br />
Scanner GE LS Xtra GE LS 16 GE LS 16 Pro GE LS V<strong>CT</strong> 64 GE LS 8<br />
Scan Type Helical Helical Helical Helical Helical<br />
Rotation Time (sec) 0.6 0.7 0.5 0.5 0.8<br />
Detector Coverage (mm)<br />
Beam Collimation (mm)<br />
10 10 10 20 10<br />
Detector Rows 16 16 16 16 8<br />
Pitch 0.562 0.562 0.562 0.531 0.625<br />
Speed (mm/rot) 5.625 5.625 5.625 10.62 6.25<br />
Detector Configuration 16 x 0.625 16 x 0.625 16 x 0.625 64 x 0.625 8 x 1.25<br />
Slice Thickness (mm) 1.25 1.25 1.25 1.25 1.25<br />
Interval (mm) 0.75 0.75 0.75 0.625 0.75<br />
Scan FOV Head Head Head Small Head Head<br />
kV 80 80 80 80 80<br />
Smart mA/ Auto mA Range 110-570 80-390 110-550 100-520 80-390<br />
Noise Index 5.1 5.1 5.1 5.1 5.1<br />
(Manual mA) 370 260 360 340 260<br />
Recon 1:<br />
DFOV 17.2 17.2 17.2 17.2 17.2<br />
Recon Type Standard Standard Standard Standard Standard<br />
WW/ WL 400/50 400/50 400/50 400/50 400/50<br />
Recon Option Plus Plus Plus Full Plus<br />
Recon Option<br />
Recon 2:<br />
IQ Enhance<br />
DFOV 17.2 17.2 17.2 17.2 17.2<br />
Recon Type Bone Plus Bone Plus Bone Plus Bone Plus Bone Plus<br />
WW/ WL 3000/300 3000/300 3000/300 3000/300 3000/300<br />
Recon Option Plus Plus Plus Full Plus<br />
Recon Option<br />
Non-Contrast or Contrast<br />
<strong>CT</strong> 1 <strong>CT</strong> 2 <strong>CT</strong> 3 <strong>CT</strong> 4 & ER <strong>CT</strong> East & RP <strong>CT</strong><br />
IQ Enhance<br />
Slice Thickness (mm) 0.625 0.625 0.625 0.625 1.25<br />
Interval (mm) 0.625 0.625 0.625 0.625 0.75
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