A visual probe positioning tool for 4D ultrasound-guided radiotherapy

Type of publication:  Konferenzbericht
Publikationsstatus: Akzeptiert
Buchtitel: 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Jahr: 2018
Monat: Juli
Seiten: 883-886
Organisation: IEEE Engineering in Medicine and Biology Society (EMBS)
ISSN: 1558-4615
DOI: 10.1109/EMBC.2018.8512390
Abriss: Ultrasound (US) guidance is a rapidly growing area in image-guided radiotherapy. For motion compensation, the therapy target needs to be visualized with the US probe to continuously determine its position and adapt for shifts. While US has obvious benefits such as real-time capability and proven safety, one of the main drawbacks to date is its user dependency - high quality results require long years of clinical experience. To provide positioning assistance for the setup of US equipment by non-experts, we developed a visual guidance tool combining real-time US volume and CT visualization in a geometrically calibrated setup. By using a 4D US station with real-time data access and an optical tracking system, we achieved a calibration accuracy of 1.2 mm and a mean 2D contour distance of 1.7 mm between organ boundaries identified in US and CT. With this low calibration error as well as the good visual alignment of the structures, the developed probe positioning tool could be a valuable aid for ultrasound-guided radiotherapy and other interventions by guiding the user to a suitable acoustic window while potentially improving setup reproducibility.
Autoren: Ipsen, Svenja
Bruder, Ralf
Kuhlemann, Ivo
Jauer, Philipp
Motisi, Laura
Cremers, Florian
Ernst, Floris
Schweikard, Achim