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Pilot study of dynamic cine CTA for the evaluation of abdominal aortic aneurysms

Publication
CT Marketing Philips Healthcare

Teutelink A, Rutten A, Muhs B, Olree M, van Herwaarden J, de Vos A, Prokop M, Moll F, and Verhagen H.

* Originally published in the April 2006 issue of Journal of Endovascular Therapy.

 

Purpose
To utilize 40-slice electrocardiographically (ECG)-gated cine computed tomographic angiography (CTA) to characterize normal aortic motion during the cardiac cycle at relevant anatomical landmarks in preoperative abdominal aortic aneurysm (AAA) patients.

 

Methods
In ten consecutive preoperative AAA patients (ten men; mean age 78.8 years, range 69-86), an ECG-gated CTA dataset was acquired on a 40-slice CT scanner using a standard radiation dose. CTA quality was graded and scan time was measured. Pulsatility measurements at multiple relevant anatomical levels were performed in the axial plane. Changes in aortic circumference were determined for both the aortic wall and the luminal diameter.

 

Results
All ten CT scans were of good quality. All patients could be scanned in 14 to 33 seconds (mean 21). At each anatomical level measured, there was a 2.2- to 3.4-mm increase in the aortic wall circumference per cardiac cycle. A similar increase was observed in luminal circumference, with a 2.4- to 3.6-mm increase per cycle.

 

Conclusion
This study introduces the concept of dynamic cine CTA imaging of aortic motion, providing insight into the pathophysiology of abdominal aortic and iliac pulsations. Patients with AAAs selected for EVAR demonstrate changes in aortic circumference with each cardiac cycle that may have consequences for endograft sizing and future design. The potential for graft migration, intermittent type I endoleak, and poor patient outcome following EVAR can be anticipated. Complex aortic dynamics deserve increased scrutiny in an effort to prevent potential complications.

For more information about this publication, check out the PubMed listing for this article.


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Publication
Brilliance 40-channel
abdomen, abdomen CTA, abdominal aneurysm, aneurysm, aorta, aorta CTA, Body, cine, dose, ECG-gated, Vascular
 

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