CTA Upper Extremity C+
(last updated 02/23/2021, last reviewed 05/24/2023)
(last updated 02/23/2021, last reviewed 05/24/2023)
INDICATIONS: Upper extremity ischemia, arterial injury, arterial dissection, arterial occlusion
*Superman position, arm above head and isocenter (if patient unable, can do arm by side)
SERIES
- 1 mm Axial CTA (Aortic arch - Subclavian/innominate takeoff through hand)
- 2 mm Coronal CTA
- 2 mm Sagittal CTA
- Cor and Sag MIP
- 3D MIP
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POSITIONING/MODE
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supine/helical arm above head |
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kV/mA/rot time
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120kV/auto mA/0.5 sec |
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DETECTOR COLLIMATION
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24 x 1.2 mm |
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SLICE THICKNESS
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1 mm |
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PTICH
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1 to 1.5 |
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TABLE FEED
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5.8 cm/sec |
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KERNAL
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std |
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SFOV
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inlcude arm and enough of hemithorax for arch vessel origin |
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COVERAGE
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Subclavian/innominate artery origin @ aortic arch -> palmar arch @ hand |
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ACQUISITION
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craniocaudal |
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IV CONTRAST
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inject contralateral arm weight based or 100 mL Isovue 370, then 40 to 60 mL saline |
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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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RESPIRATION
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Inspiration |
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POSTPROCESSING
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Coronal, Sagittal, MIPS, 3D |
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