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Localization of endovascular tools in X-ray images using a motorized C-arm: Visualization on HoloLens

: Chen, Y.; Shah, N.Y.; Goswami, S.S.; Lange, A.; Haxthausen, F. Von; Sieren, M.M.; Hagenah, J.; Ernst, F.; García-Vázquez, V.


Current directions in biomedical engineering 6 (2020), Nr.1, Art. 20200029, 5 S.
ISSN: 2364-5504
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
Fraunhofer MEVIS ()

C-arms are medical devices widely used for image-guided minimally invasive endovascular procedures. This technology requires considerable experience for the physicians to position the C-arm to obtain X-ray images of the endovascular tools. In addition, this image-guided therapy is based on two-dimensional images which lack depth information. The purpose of this study was to develop a system that controls the C-arm movements based on the previous position of the tip of a guide wire and the vessel information, and also displays the estimated tip position (specifically, the virtual line that would join the X-ray source and the projected tip in the flat-panel detector) on an augmented reality device (HoloLens). A phantom study was conducted to evaluate the system using intraoperative cone-beam computed tomography scans to obtain the reference tip position. The mean distance between the tip position (ground truth) and the virtual three-dimensional line was 1.18 mm. The propo sed system was able to control the C-arm movements based on the position of the tip of the guide wire. The visualization on HoloLens also allowed a more intuitive understanding of the position of the endovascular tool related to the patient's anatomy during the intervention.