CT angiography and terms used as well as common syndromes.

1. CT Angiography
Dr. Dalia El Saied, M.D

2. CT Angiography and venography
• Aorta ..aneurysm.
• Lower limbs.
• Pulmonary.
• Mesenteric …angiodysplasia.
• Carotid.

3. Normal measurements
• Annulus:- 20 - 31 mm
• Sinotubular junction:- 22 - 36 mm.
• Ascending aorta:- 22 - 36 mm.
• Aortic arch:- 22 - 36 mm.
• Descending thoracic aorta:- 20- 30 mm

4. Variants of the aortic arch branches

5. Mural ulcers
• Aortic arch aneurysm
showing mural ulcers (black
arrows) and intramural
thrombus (white star).

6. AAA

7. STENT
/ENDOVASCULAR
REPAIR

8. Leakage types

9. Aorto-bifemoral bypass graft
for aortoiliac occlusive disease

11. CT angiography lower limbs

12. Terms used
• Pruning.
• Faintly opacified.
• Non opacification.
• Multifocal occluded segments.
• Total occlusion with collateral refilling of the
distal segment. (arrows)

13. Anatomy

14. Lower limbs angiography
• Superficial system :-
Two veins
• (Short saphenous laterally, long
saphenous medially)
• Deep system:-
- Accompanying the arteries,
two vena comitans below knee.

15. Indications
• Deep vein thrombosis (DVT) (The most common indication).
Technique:-
• Apply tight ankle tourniquet.
(so that the contrast will be blocked from entering the superficial veins
forcing it into the deep veins).
• Place butterfly needle into a vein on the dorsum of
the foot.
• Inject contrast material and imaging during venous
phase.

16. Acute DVT
Axial CT venogram at the calf level
shows Bilateral DVT.
- Multiple endoluminal filling defects
in left posterior tibial and peroneal
veins as well as in sural veins
bilaterally (arrows).
- Thrombosed veins are enlarged.
- Strongly enhanced dilated superficial collateral veins on both
sides (arrowheads)

17. May Thurner syndrome
Severe stenosis in the left
common iliac vein in MIP
image.

18. Pelvic congestion syndrome
Dilated left gonadal vein