Abstract
Purpose/Objective(s): Treatment targets under frameless stereotactic radiosurgery (SRS) can be localized by optical guidance platform (OGP) using a stereoscopic camera. The registration of the target to isocenter is by IR markers on a patient bite block. The rigidity of the bite block and treatment target will determine the accuracy of the treatment. However, the offset between the biteblock and target cannot be visually detected; therefore conebeam CT(CBCT) is used to verify the accuracy of target localization based on information of anatomy volume. In this study, the relationship between these two localization methods was investigated by sequential perturbations of the setup.
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