Abstract
The CyberKnife System uses a combination of in-room X-ray and optical imaging systems, image registration algorithms, and translational and rotational offset corrections applied to the treatment couch robot and treatment delivery robot in order to maintain noninvasive stereotactic alignment during neuroradiosurgery. The sequence of image acquisition—image registration–alignment offset calculation–application of offset corrections, continues throughout every treatment session in order to compensate for intra-treatment motion. Various image registration and offset calculation methods are used depending on the body site being treated, and those methods specific to intracranial and spinal targets are described in this chapter. Finally, phantom-based and clinical methods used to assess the total geometric accuracy of these approaches are described. These methods encompass error contributions from the full end-to-end treatment process of pre-treatment imaging, treatment planning, and treatment delivery. Results of these tests demonstrate that a geometric treatment delivery accuracy <1 mm is consistently achieved during CyberKnife neuroradiosurgery.
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Acknowledgments
The author would like to acknowledge his colleagues Kolos Lugosi and Jonathan McCoy in the Accuray Research & Development team for helpful discussions during the preparation of this chapter.
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Kilby, W. (2020). The Target Locating System for CyberKnife Neuroradiosurgery. In: Conti, A., Romanelli, P., Pantelis, E., Soltys, S., Cho, Y., Lim, M. (eds) CyberKnife NeuroRadiosurgery . Springer, Cham. https://doi.org/10.1007/978-3-030-50668-1_4
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DOI: https://doi.org/10.1007/978-3-030-50668-1_4
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