CTA Thoracic Outlet Syndrome
(last updated 02/25/2021, last reviewed 02/02/2026)
INDICATIONS: Thoracic outlet syndrome.
SERIES:
* Inject asymptomatic side*
First bolus – Symptomatic arm by side (adducted), injection arm up
Arterial phase (aortic arch timing ~20 sec)
Venous phase (~90 sec delay)
-2 mm axial
-2 mm coronal
-2mm sagittal
-Cor and Sag MIP
-3D MIP
Second bolus – Symptomatic arm by head (abducted), injection arm down
Arterial phase (aortic arch timing ~20 sec)
Venous phase (~90 sec delay)
-2 mm axial
-2 mm coronal
-2mm sagittal
-Cor and Sag MIP
-3D MIP
POSITIONING/MODE: supine / helical
SINGLE COLLIMATION WIDTH: 0.625 mm
SLICE THICKNESS: 2 mm
KERNAL: std
SFOV: large
COVERAGE: chest to elbow of symptomatic side
ACQUISITION: chest to elbow
ORAL CONTRAST: no
IV CONTRAST: 75 to 125 mL Isovue 370
INJECTION RATE: 4 mL/sec
SCAN DELAY: Care bolus at aortic arch (100HU) ~20 sec, venous phase ~90 sec
RESPIRATION: inspiration
POSTPROCESSING: 2 mm cor/sag CTA, MIPS