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

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16 Revised 7/22/09 (Gentry/Ranallo) Head: Helical Pediatric Infant (0– 3 yr) Non-Contrast or 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 Helical Helical Helical Helical Helical Rotation Time (sec) 0.5 0.7 0.4 0.4 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) 2.5 2.5 2.5 2.5 2.5 Interval (mm) 1.5 1.5 1.5 1.5 1.5 Scan FOV Head Head Head Small Head Head kV 80 80 80 80 80 Smart mA/ Auto mA Range 140-675 80-390 140-675 130-640 80-390 Noise Index 3.3 3.3 3.3 3.3 3.3 (Manual mA) 460 260 460 430 260 Recon 1: DFOV 20 20 20 20 20 Recon Type Standard Standard Standard Standard Standard WW/ WL 80/25 80/25 80/25 80/25 80/25 Recon Option Plus Plus Plus Plus Plus Recon 2: DFOV 20 20 20 20 20 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 Full Full Full Full Full Slice Thickness (mm) 2.5 2.5 2.5 2.5 2.5 Interval (mm) 1.25 1.25 1.25 1.25 1.25
17 Revised 7/22/09 (Gentry/Ranallo) Pediatric Head: Helical Scan with Angled Axial Reformations (< 6 years of age) (Protocol # 11.3 & 11.4) Billing: 1. CT Head without, or with, or without and with 2. Contrast if used Setup: 1. Use this protocol when the head cannot be properly positioned for a routine helical head scan. Example: when you cannot move the patient’s head into proper position (trauma, cervical collar, rigid neck) 2. Supine, AP and lateral scouts, no gantry angle 3. Start the scans at C2 and scan through the top of the head 4. Do not send the source data to PACS (Only send the 2D-reformations) 5. Obtain 2D-reformations parallel to a line connecting the infraorbital rim with the opisthion (see below). Start reformations at the bottom of C1 and go to the top of the head using a 20 cm DFOV. 6. Important: Be certain that dental filling artifact does not extend across the brain on the helical raw data. If it does, then use the axial mode head protocol instead. DFOV: Preferred 16 cm (Range 14-18 cm) Contrast: 1. 1 ml / pound (2 ml/kg) of 240 non-ionic contrast @ 0.6 ml/sec 2. Begin scanning as soon as contrast injection is finished Patient Age: 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) Other Info: 1. 2D-Reformations a. Axial Soft Tissue: 5 mm thick with an interval of 2.5 mm b. Axial Bone: 2.5 mm with an interval of 1.25 mm
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Vascular Imaging: Stroke Deluxe: (A
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CT Protocols: (Brain, ENT, Spine, Vascular) - Department of Radiology

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