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- W245247753 abstract "A system for visual image guidance in patient set-up for external-beam radiotherapy procedures was developed using augmented reality. The system uses video cameras to obtain views of the linear accelerator, and the live images are displayed on a monitor in the treatment room. 3D models of the patient’s external surface, obtained from planning CT data, are superimposed onto the treatment couch in the camera images. The real patient can then be aligned with the virtual contour guided by the augmented monitor. The system provides an intuitive method for set-up guidance, and allows non-rigid deformations to patient pose to be visualized. It also allows changes to patient geometry between treatment fractions to become observable. It can remain in operation throughout the treatment procedure, so that patient motion becomes apparent. Coordinate registration of the system is performed using a small cube, which can be aligned with the linac isocentre using lasers in the treatment room, or by using cone-beam CT alignment. The augmented reality tracking software detects planar fiducial tracking markers attached to the cube faces, and determines their positions in order to perform pose estimation of the 3D models on-screen. Experiments with an anthropomorphic human phantom have shown that the system can be used to position a rigid-body with a translational error of 3 mm, and a rotational error of 0.11°, 0.22° and 0.23° corresponding to yaw, pitch and roll, respectively." @default.
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- W245247753 date "2009-01-01" @default.
- W245247753 modified "2023-09-27" @default.
- W245247753 title "An Augmented Reality Application for Patient Positioning and Monitoring in Radiotherapy" @default.
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- W245247753 doi "https://doi.org/10.1007/978-3-642-03474-9_174" @default.
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