[CT angiography versus intra-arterial DSA in abdominal aortic aneurysms].
OBJECTIVE
To evaluate if CT angiography is able to image all features necessary for the preoperative planning of abdominal aortic aneurysms (accessory renal arteries, stenoses or occlusions of renal and iliac arteries, patency of inferior mesenteric artery).


METHODS
CT angiography and DSA were performed on 27 patients with abdominal aortic aneurysms. CT angiography was performed using a protocol that covered the abdominal aorta and the pelvic arteries with a single spiral acquisition (contrast dose: 150 ml, collimation: 5 mm, table feed: 7.5 mm/s, increment of reconstruction: 2 mm). Maximum intensity projections (MIP) and axial scans were compared with the results of intraarterial DSA.


RESULTS
Using axial scans and subvolume MIP, CTA accurately defined 7/8 accessory renal arteries, 13/13 occlusions and 9/12 high grade stenoses of renal and pelvic arteries. High-grade stenoses of the iliac arteries were underestimated in two cases and overlooked in one case. CT angiography was superior to DSA in imaging the inferior mesenteric artery. CT angiography precisely diagnosed 33 aneurysms of the iliac, renal and coeliac arteries.


CONCLUSIONS
CT angiography using a single administration of intravenous contrast may replace preoperative DSA in most cases of abdominal aortic aneurysm.
Rieker
O
O
Klinik für Radiologie, Johannes-Gutenberg-Universität Mainz.
Düber
C
C
Schmiedt
W
W
Neufang
A
A
Pitton
M
M
Schweden
F
F
D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000379:methods / Q000706:statistics & numerical data; D015901:Angiography, Digital Subtraction / Q000379:methods / Q000706:statistics & numerical data; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging*; D003287:Contrast Media; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007479:Iopamidol; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011857:Radiographic Image Interpretation, Computer-Assisted; D014057:Tomography, X-Ray Computed / Q000379:methods / Q000706:statistics & numerical data
D003287:Contrast Media; D007479:Iopamidol
CT-Angiographie versus intraarterielle DSA bei Bauchaortenaneurysmen.