CTA CHEST/ABDOMEN DISSECTION C+
(last updated 7/9/2019, last reviewed 02/10/2022)
(last updated 7/9/2019, last reviewed 02/10/2022)
INDICATION: r/o dissection.
SERIES:
- 10mm 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)
| | PRECONTRAST | CTA |
|
POSITIONING/MODE
|
Supine/Helical |
Supine/Helical |
|
kV/mA/rot time
|
120kV/auto mA/0.5 sec |
120kV/auto mA/0.5 sec |
|
DETECTOR COLL
|
16 x 1.5mm (S16) 24 x 1.2mm (D64) |
16 x 1.5mm (S16) 24 x 1.2mm (D64) |
|
SLICE THKN
|
10mm |
3mm |
|
PITCH
|
1 to 1.5 |
1 to 1.5 |
|
TABLE FEED
|
4.8 cm/sec (S16) 5.8 cm/sec (D64) |
4.8 cm/sec (S16) 5.8 cm/sec (D64) |
|
KERNAL
|
std |
std and lung |
|
SFOV
|
large |
large |
|
COVERAGE
|
thoracic inlet to aortic bifurcation |
thoracic inlet to aortic bifurcation |
|
ACQUISITION
|
craniocaudal |
craniocaudal |
|
ORAL CONTRAST
|
no |
no |
|
IV CONTRAST
|
none |
100 mL Isovue 370 |
|
INJECTION RATE
|
--- |
4 mL/sec |
|
SCAN DELAY
|
--- |
Care bolus @ Ascending Ao (100 HU) 35 sec delay b/w C and A (S16) 38 sec delay b/w C and A (D64) |
|
RESPIRATION
|
Inspiration |
Inspiration |
|
POSTPROCESSING
|
--- |
3mm Axial CTA 5mm Axial lung (chest only) 3mm Cor, Sag, Obl Sag/candy cane CTA 3mm Cor and Sag lung windows/chest |
Precontrast imaging is required in cases of r/o dissection to evaluate for intramural hematoma.
