University of Twente Student Theses


Real-time tracking of rectal tumours during colorectal cancer surgery

Versteeg, Nathalie (2017) Real-time tracking of rectal tumours during colorectal cancer surgery.

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Abstract:Introduction: In 2014, over 15,000 patients were diagnosed with colorectal cancer in the Netherlands. The clinical challenge in surgery is to find a balance between radicality of surgery and preservation of function. The aim of this study is to implement a surgical image-guided electromagnetic (EM) navigation procedure in which a moving tumour can be traced to provide the surgeons with real-time information on the tumour location and orientation. Material and methods: The window field generator (WFG) was incorporated into the workflow and the accuracy of the WFG was evaluated. A sensor implantation and fixation method was designed. A chain test was designed to test the entire workflow and an in-vivo study was implemented. Results and discussion: The WFG was successfully incorporated into the navigation setup by placing it on the table in a custom made matrass. The vector jitter was approximately 0.02 cm within 45 cm from the WFG in both settings, this is sufficient. In test setting the position vector RMSE increased up to 1.10. cm at 45 cm distance from the WFG. Sensor implantation was successful in ex-vivo testing and in one of three patients that was operated on and needs further development.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Subject:44 medicine, 50 technical science in general
Programme:Technical Medicine MSc (60033)
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