Design and validation of a surgical navigation system for brachytherapy based on mixed reality

• DOI: 10.1002/mp.13645
• Publication Date: 2019-06-06T15:18:45Z
• Authors: Zeyang Zhou; Zhiyong Yang; Shan Jiang; Fujun Zhang; Huzheng Yan
• Keywords: Navigation System; Iterative closest point

Purpose An accurate position of the needle is vitally important in low‐dose‐rate seed implantation brachytherapy. Our paper aims to implement a mixed reality navigation system assist with placement I 125 thoracoabdominal tumor brachytherapy and validate accuracy quality this type method. Methods With surgical system, based on through novel modified multi‐information fusion method, virtual organs preoperative plan for real patient tracking tools time were achieved. Personalized image recognition pose estimation used track punctures perform registration processes. After one‐time hexagonal prism tracker that an iterative closest point algorithm, all information, including medical images volume renderings organs, needles, seeds, was precisely merged patient. Doctors able observe target visualize plan. This validated both phantom animal experiments. The by calculating positional rotational error each insertion. determined experiment test efficiency also consumption assessments. Results In experiment, average locations 0.664 mm angle 4.74°, 16.1 min six needles inserted. Based results insertion 1.617 mm, while 5.574° positions 1.925 mm. Conclusions describes design experimental validation tumors. series experiments, experiments Compared traditional image‐guided procedure presented here convenient, displays clinically acceptable reduces number CT scans, allowing doctors surgery visualized All indicated ready be applied further clinical studies.