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23 February 2010Real-time fiber selection using the Wii remote
In the last few years, fiber tracking tools have become popular in clinical contexts, e.g., for pre- and intraoperative
neurosurgical planning. The efficient, intuitive, and reproducible selection of fiber bundles still constitutes one
of the main issues. In this paper, we present a framework for a real-time selection of axonal fiber bundles
using a Wii remote control, a wireless controller for Nintendo's gaming console. It enables the user to select
fiber bundles without any other input devices. To achieve a smooth interaction, we propose a novel spacepartitioning
data structure for efficient 3D range queries in a data set consisting of precomputed fibers. The data
structure which is adapted to the special geometry of fiber tracts allows for queries that are many times faster
compared with previous state-of-the-art approaches. In order to extract reliably fibers for further processing,
e.g., for quantification purposes or comparisons with preoperatively tracked fibers, we developed an expectationmaximization
clustering algorithm that can refine the range queries. Our initial experiments have shown that
white matter fiber bundles can be reliably selected within a few seconds by the Wii, which has been placed in a
sterile plastic bag to simulate usage under surgical conditions.
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Jan Klein, Mike Scholl, Alexander Köhn, Horst K. Hahn, "Real-time fiber selection using the Wii remote," Proc. SPIE 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling, 76250N (23 February 2010); https://doi.org/10.1117/12.843203