Int J Med Robot - In vitro three-dimensional aortic vasculature modeling based on sensor fusion between intravascular ultrasound and magnetic tracker.

Tópicos

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Resumo

CKGROUND: It is desirable to reduce aortic stent graft installation time and the amount of contrast media used for this process. Guidance with augmented reality can achieve this by facilitating alignment of the stent graft with the renal and mesenteric arteries.METHODS: For this purpose, a sensor fusion is proposed between intravascular ultrasound (IVUS) and magnetic trackers to construct three-dimensional virtual reality models of the blood vessels, as well as improvements to the gradient vector flow snake for boundary detection in ultrasound images. In vitro vasculature imaging experiments were done with hybrid probe and silicone models of the vasculature.RESULTS: The dispersion of samples for the magnetic tracker in the hybrid probe increased less than 1 mm when the IVUS was activated. Three-dimensional models of the descending thoracic aorta, with cross-section radius average error of 0.94 mm, were built from the data fusion.CONCLUSION: The development of this technology will enable reduction in the amount of contrast media required for in vivo and real-time three-dimensional blood vessel imaging.

Resumo Limpo

ckground desir reduc aortic stent graft instal time amount contrast media use process guidanc augment realiti can achiev facilit align stent graft renal mesenter arteriesmethod purpos sensor fusion propos intravascular ultrasound ivus magnet tracker construct threedimension virtual realiti model blood vessel well improv gradient vector flow snake boundari detect ultrasound imag vitro vasculatur imag experi done hybrid probe silicon model vasculatureresult dispers sampl magnet tracker hybrid probe increas less mm ivus activ threedimension model descend thorac aorta crosssect radius averag error mm built data fusionconclus develop technolog will enabl reduct amount contrast media requir vivo realtim threedimension blood vessel imag

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