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(A) Radial displacements of rotation isocenter for the 6DTC and the robot couch. The circles along the solid curve represent CW rotation for 6DTC. The dashed curve represents CCW rotation for the 6DTC. The squares hollow along the solid curve represent CW rotation for robot couch. The dotted curve represents CCW rotation for robot couch. (B) Displacements of chair rotation isocenter after correction by the 6DOF platform.
