CTA ENDOGRAFT/EVAR
(last updated 9/30/2021 last reviewed 12/15/2025)
INDICATION: Evaluate aortic endograft, endoleak.
SERIES
- 3mm Axial precontrast, delayed
- 1mm Axial CTA
- 3mm Coronal CTA and delayed
- 3mm Sagittal CTA and delayed
- 3D volume rendered,3D MIPs CTA
Coverage depends on position of EVAR (abdominal, thoracic) and exam ordered (most commonly CTA AP diaphragm -> CFA bif. Less common CTA CAP apices -> CFA bif; CTA CA apices -> aortic bif)
TECHNICAL PARAMETERS
PRECONTRAST
POSITIONING/MODE: supine / helical
SINGLE COLLIMATION WIDTH: 0.625 mm
SLICE THICKNESS: 3 mm
KERNAL: std
SFOV: large
COVERAGE: diaphragm -> CFA bif
ACQUISITION: craniocaudal
ORAL CONTRAST: no
IV CONTRAST: none (precontrast)
RESPIRATION: inspiration
POSTCONTRAST – ARTERIAL (CTA)
POSITIONING/MODE: supine / helical
SINGLE COLLIMATION WIDTH: 0.625 mm
SLICE THICKNESS: 1 mm
KERNAL: std
SFOV: large
COVERAGE: diaphragm -> CFA bifurcation
ACQUISITION: craniocaudal
ORAL CONTRAST: no
IV CONTRAST: 75 to 100 mL Isovue 370
INJECTION RATE: 4 mL/sec
SCAN DELAY: Care bolus aorta @ diaphragm (100HU)
RESPIRATION: inspiration
POSTPROCESSING: 3 mm cor/sag CTA, volume rendered 3D
POSTCONTRAST – DELAYED
POSITIONING/MODE: supine / helical
SINGLE COLLIMATION WIDTH: 0.625 mm
SLICE THICKNESS: 3 mm
KERNAL: std
SFOV: large
COVERAGE: diaphragm -> CFA bifurcation
ACQUISITION: craniocaudal
ORAL CONTRAST: no
IV CONTRAST: (administered for arterial phase/CTA 75 to 100 mL Isovue 370)
INJECTION RATE: 4 mL/sec
SCAN DELAY: Care bolus
RESPIRATION: inspiration
POSTPROCESSING: 3 mm cor/sag delayed