title: Video-coaching as biofeedback tool to improve gated treatments: Possibilities and limitations.
abstract: For respiratory gated radiotherapy the manufacturers of linear accelerators offer dedicated gating technologies. The video-based Varian RPM Gating system (Varian Medical Systems, Palo Alto/CA, USA) includes in a standard configuration a support tool for regular breathing called audiocoaching. As this approach has limitations regarding direct control of the patient's breathing due to a missing feedback, we designed an additional tool offering videocoaching. In order to evaluate the impact of this additional functionality, we measured parameters defining the image quality of 4D-CT data as well as the treatment duration which is mainly influenced by the patient's limited ability to achieve a stable breathing pattern.
authors.affiliation: Medtech Consulting Cossmann, Säntisstrasse 10, 5430 Wettingen, Switzerland. peter.cossmann@medtechconsulting.ch
authors.forename: Peter H
authors.initials: PH
authors.lastname: Cossmann
mesh_terms: D001676:Biofeedback, Psychology / Q000379:methods*; D062485:Breath Holding; D006801:Humans; D011856:Radiographic Image Enhancement / Q000379:methods*; D020266:Radiotherapy, Conformal / Q000379:methods; D061089:Radiotherapy, Image-Guided / Q000379:methods*; D015203:Reproducibility of Results; D055425:Respiratory-Gated Imaging Techniques / Q000379:methods*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014741:Video Recording / Q000379:methods*