SERIES:

• 3mm Axial precontrast
• 3mm Axial CTA 
• 1mm Axial lung windows
• 3mm Coronal CTA
• 3mm Sagittal CTA
• 3mm Cor lung windows (chest only)
• 3mm Sag lung windows (chest only)
• Cor MIPS lung windows (chest only)

**Precontrast imaging is required in cases of r/o dissection to evaluate for intramural hematoma

TECHNICAL PARAMETERS

PRECONTRAST

POSITIONING/MODE: supine / helical

SINGLE COLLIMATION WIDTH: 0.625 mm 

SLICE THICKNESS: 3 mm

KERNAL: std

SFOV: large

COVERAGE: thoracic inlet -> aortic bifurcation

ACQUISITION: craniocaudal

ORAL CONTRAST: no

IV CONTRAST: none (precontrast)

RESPIRATION: inspiration

POSTCONTRAST

POSITIONING/MODE: supine / helical

SINGLE COLLIMATION WIDTH: 0.625 mm 

SLICE THICKNESS: 3 mm / 1 mm

KERNAL: std, lung

SFOV: large

COVERAGE: thoracic inlet -> CFA bifurcation

ACQUISITION: craniocaudal

ORAL CONTRAST: no

IV CONTRAST: 75 to 100 mL Isovue 370

INJECTION RATE: 4 mL/sec

SCAN DELAY: Care bolus @ascend aorta (100HU), 35 sec delay b/w C and A/P

RESPIRATION: inspiration

POSTPROCESSING: 3 mm axial CTA, 1 mm axial lung, 3 mm cor/sag CTA, 3 mm cor/sag lung, cor MIPS lung