Keywords:
Interventional vascular, Arteries / Aorta, Vascular, CT-Angiography, Fluoroscopy, Catheter arteriography, Embolisation, Experimental investigations, Arthrography, Aneurysms, Artifacts, Prostheses
Authors:
K. M. Eberhardt, D. Maxien, M. F. Reiser, M. Treitl; Munich/DE
DOI:
10.1594/ecr2013/C-0276
Purpose
The application of Onyx (Covidien Inc.,
Plymouth,
MN,
USA) has formerly been limited to neuro-interventions (1-4),
but lately,
embolization with Onyx has become more frequent in terms of peripheral interventions (5). Onyx is now used for treatment of endoleaks typ 1 and 2 after aortic stent-grafting (6-8),
aortic pseudoaneurysms (9-10) and for abdominal bleeding control (11). The main problem in this context is the high tantalum content of Onyx,
which is needed tor visualization during embolization procedure.
But tantalum also causes strong CT beam hardening artifacts that restrict diagnostic imaging in long-term of follow-up examinations.
Therefore diagnostic information of follow-up-CTA is limited e.g.
for monitoring of endoleak recanalization,
for detection of the origin of re-perfusion or for localization of any leakage.
The two aims of our study were the reduction of Onyx` tantalum content and the development of an aortic phantom that simulated a stented aneurysm.
Concerning the first aim,
we wanted to find the perfect tantalum concentration of Onyx,
that enabled visualization during embolization process as well as diagnostic imaging during CT-follow-up examinations. Concerning the second aim,
we wanted to develop an aortic phantom that could be used for simulation and visualization of endoleaks and their treatment procedures and corresponding follow-up examinations.