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
Results
In our first phantom,
the artifact intensity decreased with decreasing amount of tantalum. According to that,
visibility of endoleak reperfusion increased with decreasing tantalum content.
The Onyx suspensions with 10-50% tantalum content of the original product caused a reasonable amount of artifacts that enabled diagnosis of the simulated endoleak re-perfusion.
In the second phantom,
for which we used the commercially mixed Onyx suspensions,
we saw that simulation of severe endoleak re-perfusion could be diagnosed at tantalum concentrations less than 50% of the original product. The artifact intensity of Onyx suspensions with less than 50% tantalum of the original product was also rated as tolerable.
Slight endoleak re-perfusion,
which was defined as endoleak areas extending to 1 mm in width or less,
could be diagnosed at tantalum concentrations with less than 45% of the original product.
Fluoroscopicaylly controlled trans-catheter injection of the commercial Onyx suspensions into the predefined endoleak cavities of our second phantom,
confirmed that suspensions with higher amounts of tantalum were more visible than those with low tantalum content.
Concerning Onyx suspensions with 30% tantalum or less,
the visibility of Onyx during embolization process was bad.
In addition the radiologist`s certainty about the injected volume was also low.
According to that reasonable amounts of these Onyx suspensions had to be injected before first visualization of the cast leaving the catheter tip.