CTA Thoracic Inlet Syndrome
(last updated 02/25/2021, last reviewed 02/10/2022)
(last updated 02/25/2021, last reviewed 02/10/2022)
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
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 |
|
kV/mA/rot time
|
120kV/auto mA/0.5 sec |
|
DETECTOR COLLIMATION
|
24 x 1.2 mm |
|
SLICE THICKNESS
|
2 mm |
|
PITCH
|
1 to 1.5 |
|
TABLE FEED
|
5.8 cm/sec |
|
KERNAL
|
std |
|
SFOV
|
large |
|
COVERAGE
|
mid chest (include entire aortic arch) to elbow of symptomatic side |
|
ACQUISITION
|
chest to elbow |
|
IV CONTRAST
|
weight based or 100 mL Isovue 370 followed by 40 to 60 mL saline |
|
INJECTION RATE
|
4 mL/sec |
|
SCAN DELAY
|
Arterial phase: Bolus tracking @aortic arch ~20 sec Venous phase: ~ 90 sec |
|
RESPIRATION
|
Inspiration |
|
POSTPROCESSING
|
Coronal, Sagittal, MIPS, 3D |