adominal aorta anatomy.pdf……………………👌🏻👌🏻

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1. Radiological anatomy of the
abdominal aorta and its major
branches.
1

2. Introduction
✓Continuation of thoracic
aorta at diaphragmatic
hiatus(12
ththoracic
vertebra)
✓Itis12cmlong,2-3cmwide
✓Itliesanteriorto T12/l1to l4
vertebrae
✓Accompaniedbythe
thoracicduct,azygousand
hemi-azygousvein,the
sympathetictrunkand
splanchnicnerve.
2

3. Relations
✓thediaphragmaticcrura
envelopedtheanteriolateral
surfaceoftheabdominal
aortaatthehiatus.
Posteriorly
✓it lies along the anterior
aspectof thelumbar
vertebraeslightly to theleft
andclosedtotheleftpsoas
muscle
✓Theleftlumbarveinspasses
posteriortoabdominalaorta
3

4. Relations
•IVCliesrighttoit
Anteriorly
•splenic vein and
bodyofpancreas,
left renal vein,3rd
part of the
duodenum.
Posterior
•leftpsoas,left
lumbarvein
4

5. Branchesoftheabdominalaortaseenon
angiogram
asfollows:
•Threeunpairedanteriorbranches:
CoeliactrunkatT12/L1
SuperiormesentericarteryatL1
InferiormesentericarteryatL3
•Threelateralpairedvisceralarteries:
AdrenalarteriesatL1
RenalarteriesatL1/L2
GonadalarteriesatL3
5

6. Cont’d
•Fivelateral pairedparietalbranches:
InferiorphrenicarteriesatT12
Fourpairsoflumbararteries
•Terminalarteries:
Thecommoniliacarteries
Mediansacralartery.
6

7. 8

8. Celiacaxis(trunk,artery)
a.Firstunpairedbranchoff
abdominalaorta(~L-1).
b.Originatesfromventralsurface.
c.Gives rise tosplenic,commonhepatic,&
leftgastricarteries.
Radiological vascular anatomy of the
vascularanatomyofthe abdomen.

9. CeliacArtery
a.Firstunpaired
branch of
abdominal
aorta(~T-12)
b.Givesriseto:
1.SplenicArtery:
c.largestonleft
d.supplies spleen,
pancreas
fundusof
stomach

10. CTangiogramabdominalvesselsanatomy.

11. ArteriesoftheAbdominal
Aorta.

12. Celiac
artery

13. Celiacartery.

17. CommonHepaticArtery
a.Right branchofceliaca.
b.ContinuestoGDA(The
gastroduodenal artery) , then.
ProperHepaticArtery
a.Brancheswithinliver
b.Beginat~porta hepatis

18. BloodSupplyto
Liver.

19. SuperiorMesentericArtery
a.Second, unpairedbranchofabdominalaorta.
b.Originates~lowerL-1body.
c.1–2cmbelowceliacaxis.
d.Suppliessmallintestines,pancreas,omentum,
ascendingandtransversecolon.

20. SMA
a.Secondunpairedbranch
b.Arises1–2cm belowceliacartery
c.Mayhavecommonorigin
d.After~6”,
1.coursesparalleltoaorta
2.thenturnsobliquetowardrightiliac fossa
Numerousbranchesthatsometimesanastomose
e.Supplies:
1.smallintestines
2.cecum
3.appendix
4.ascending&transverse colon.
5.pancreas

23. Coronal maximumintensityprojectionofthesuperiormesentericartery
anditsbranches.ThisimagewascreatedonaworkstationwithCT data
fromastate-of-the-art16-slice multidetectorCTscanner.Notethefine
detailthatisvisibleoftheend-organarteriesofthejejunumandileum.

25. InferiorMesentericArtery
a.Arisesjustabovethebifurcation ofthe
aorta(~L-3/4)
b.Last unpairedbranchof aorta
c.Supplies jejunum, descending and
sigmoidcolon, rectum

26. DistributionoftheSuperiorandInferiorMesenteric
Arteries

28. Renalarteries
a.Firstmajorpairedbranchesfromaorta.
b.Ariseoppositeeachother1-2 cm belowSMA(L-
2).
c.Multiple renal arteriesoccurin20%ofpatients.

30. Renal
Arteries.

32. Normal renalarteries.AxialMIP image,obtainedtoevaluatefor
renalarterystenosis,clearly showstherenalarteries(arrows),
whicharenormalanddemonstrateno evidenceofstenosis.

33. MIPoftherenalarteries.

34. VolumeRenderingimagesdemonstratethenormalanatomy
of renal arteries (arrows). The renal arteries typically arise
from the aorta at the level of L1, L2 intervertebral disc below
theoriginofthesuperiormesentericartery(arrowhead).

35. Coronalvolumerenderingimagesshowanterior(A)and posterior(B)viewsofnormal
segmentalanatomyoftherenalartery.Thefirstdivisionis theposteriorbranch(arrow
head).Posteriorbranchgives twosegmentalbranches(blackarrows),supplyingthe
posteriorcentralportionofthekidney.Themainrenalartery thencontinuesitscourse
beforebranchingintofouranteriorbranches(arrows)attherenalhilum.

36. Coronal(A) and axial (B) volume rendering images shown or mal renal vein anatomy. Renal
veins(arrows)courseanteriorpartoftherenalarteries(arrowheads).Theleftrenalveinnormally
coursesbetweentheSMA(thin arrow)andtheaorta(smallasterisk)before drainingintothe
medialaspectoftheinferiorvenacava(bigasterisk),whiletherightonefromthelateralaspect.

37. InferiorVenaCava
a.Formedat~L-5
b.byunionofCommonIliac
Veins c.Largestvein inbody
d.Dilation may be due to:
1.right-sidedCHF
2.Portalhypertension

38. MajorVeinsofthe
Abdomen.

39. VeinsofPortalCirculation
a.SMV: joins with splenic vein.
1.runsparalleltoSMA.
2.On right side of abdomen.
b.IMV: terminates in splenic vein.
c.PortalVein:entersliver.

44. VeinsoftheHepaticPortal
System.