CTA CHEST THORACIC AORTIC ANEURYSM C+ (last updated 5/29/2018, last reviewed 02/10/2022)
(last updated 5/29/2018, last reviewed 02/10/2022)
INDICATION: Thoracic Aortic Aneurysm. Vasculits, Aortitis. Any question of aortic root/ascending aorta abnormality -- should be ECG gated study.
SERIES
- 3mm Axial CTA
- 5mm Axial lung windows
- 3mm Coronal CTA
- 3mm Sagittal CTA
- 3mm Oblique Sagittal candycane CTA
- 3D volume rendered and MIPS
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POSITIONING/MODE
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supine/helical |
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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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16 x 1.5mm (S16) 24 x 1.2mm (D64) |
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SLICE THICKNESS
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3mm |
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PITCH
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1 to 1.5 |
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TABLE FEED
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4.8 cm/sec (S16) 5.8 cm/sec (D64) |
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KERNAL
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std and lung |
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SFOV
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large |
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COVERAGE
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thoracic inlet ->diaphragm |
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ACQUISITION
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craniocaudal |
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ORAL CONTRAST
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none |
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IV CONTRAST
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100 mL Isovue 370, then 40 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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Care bolus Ascending Aorta (100 HU or visual trigger), ~20 to 30 sec |
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RESPIRATION
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Inspiration |
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POSTPROCESSING
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3mm Coronal, Sagittal, and Oblique Sagittal, 3D volume rendered and MIPS
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In cases of questioned aortic root abnormality, EKG gating should be utilized.