Meeting Banner
Abstract #2549

Assessment of marker fixation in prospective motion correction using a multiple marker approach.

Benjamin Knowles 1 , Thomas Lange 1 , Aditya Singh 2 , Michael Herbst 2 , and Maxim Zaitsev 1

1 Medical Physics, Univeristy Medical Centre Freiburg, Freiburg, Germany, 2 John A Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, United States

For accurate prospective motion correction using markers, the marker must be rigidly coupled to the motion of the imaged object. However, patient comfort and ease of adhesion are important factors, especially in a clinical setting. In this study, dual-marker tracking is used to assess drifts and non-coupled motion of markers adhered to the forehead or nose. This is achieved by tracking the relative pose of the marker compared to a reference marker fixated to a mouthpiece, assumed perfectly coupled to the skull. Drifts were measured to be small, but squinting causes large decoupling of marker motion with the skull.

This abstract and the presentation materials are available to members only; a login is required.

Join Here