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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

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17 Revised 7/22/09 (Gentry/Ranallo)<br />

Pediatric Head: Helical Scan with Angled Axial Reformations (< 6 years <strong>of</strong> age)<br />

(Protocol # 11.3 & 11.4)<br />

Billing: 1. <strong>CT</strong> Head without, or with, or without and with<br />

2. Contrast if used<br />

Setup: 1. Use this protocol when the head cannot be properly positioned for a routine helical<br />

head scan. Example: when you cannot move the patient’s head into proper position<br />

(trauma, cervical collar, rigid neck)<br />

2. Supine, AP and lateral scouts, no gantry angle<br />

3. Start the scans at C2 and scan through the top <strong>of</strong> the head<br />

4. Do not send the source data to PACS (Only send the 2D-reformations)<br />

5. Obtain 2D-reformations parallel to a line connecting the infraorbital rim with the<br />

opisthion (see below). Start reformations at the bottom <strong>of</strong> C1 and go to the top <strong>of</strong> the<br />

head using a 20 cm DFOV.<br />

6. Important: Be certain that dental filling artifact does not extend across the brain on<br />

the helical raw data. If it does, then use the axial mode head protocol instead.<br />

DFOV:<br />

Preferred 16 cm (Range 14-18 cm)<br />

Contrast: 1. 1 ml / pound (2 ml/kg) <strong>of</strong> 240 non-ionic contrast @ 0.6 ml/sec<br />

2. Begin scanning as soon as contrast injection is finished<br />

Patient Age:<br />

Choose the <strong>CT</strong> scan factors on the scanner for the proper age range <strong>of</strong> the patient<br />

1. Child: (3 – 6 years)<br />

2. Infant: (0 – 3 years)<br />

Other Info: 1. 2D-Reformations<br />

a. Axial S<strong>of</strong>t Tissue: 5 mm thick with an interval <strong>of</strong> 2.5 mm<br />

b. Axial Bone: 2.5 mm with an interval <strong>of</strong> 1.25 mm

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