Abstract
The prospect of applying of Ti-Ta coatings of micron thickness in order to increase the X-ray visibility of the small-diameter TiNi samples for endoscopic surgery is analyzed in the paper. The radiopaque properties of the Ta and Ti-Ta coatings with thickness of 1-2 μm on the surfaces of the TiNi alloy wire a diameter of 152 μm were investigated. Comparative data of calculated (according to the X-rays mass absorption coefficient) and experimental (with use of X-ray method on the angiographic installation) characteristics of the X-ray visibility of coated samples are given. It is shown that the Ti60-70Ta40-30 coatings with a thickness of 1–2 μm lead to an increase in twice the X-ray visibility of the coated TiNi wire. The change in the X-ray visibility of coated TiNi samples (wire and semi-stents) depending on the concentration of tantalum in the coating was analyzed with use of different X-ray angiographic modes.
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