CTA CAROTIDS (updated 10/28/2020, reviewed 10/28/2020)
INDICATION: Carotid stenosis, carotid dissection.
SERIES
- 1 mm axial CTA
- 2 mm coronal
- 2 mm sagittal
- 2mm oblique sagittal R and L carotid
- 3D volume rendered reformats
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POSITIONING/MODE
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Supine/helical |
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kV/mA/rot time
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120 kV/200 mAs/<1 sec |
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DETECTOR COLLIMATION
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16 x 0.75mm (S16) 64 x 0.6mm (D64) |
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SLICE THICKNESS
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1mm |
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PITCH
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</=1 |
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KERNAL
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soft tissue (B30f medium smooth ax, B20f recon) soft tissue (B30f medium smooth ax, B20f recon) |
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SFOV
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<30cm |
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COVERAGE
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aortic arch -> anterior cranial fossa/orbital roof |
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ACQUISITION
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caudocranial |
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IV CONTRAST
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80 mL Isovue 370 |
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INJECTION RATE
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4 ml/sec |
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SCAN DELAY
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Bolus tracking @ aortic arch (~20 sec) |
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POSTPROCESSING
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Coronal 2mm, 2mm oblique sagittal R and L carotid, 3D reformats
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NOTE: Oblique sagittal reformats are performed parallel to a line drawn between the internal and external carotids at the bifurcation.