title: Optical eye tracking system for noninvasive and automatic monitoring of eye position and movements in radiotherapy treatments of ocular tumors.
abstract: A noninvasive eye tracking system based on infrared 3-D video-oculographic techniques is proposed for the automatic monitoring of eye position and orientation in external beam radiotherapy of ocular tumors. The presented method can be applied for the real-time estimation of lesion position and tumor-beam misalignments, allowing automatic patient setup and eye movement gated treatments. A prototypal eye tracker was developed and tested on five subjects, achieving gaze estimation errors of 0.5° and eye monitoring frequencies of 125 Hz. The proposed application can potentially improve quality and efficacy of ocular radiotherapy treatments, currently based on invasive, qualitative, and manual control procedures.
authors.affiliation: Department of Bioengineering, Politecnico di Milano, 20133 Milano, Italy. aurora.fassi@mail.polimi.it
authors.forename: Aurora
authors.initials: A
authors.lastname: Fassi
authors.forename: Marco
authors.initials: M
authors.lastname: Riboldi
authors.forename: Christian Fabio
authors.initials: CF
authors.lastname: Forlani
authors.forename: Guido
authors.initials: G
authors.lastname: Baroni
mesh_terms: D005123:Eye / Q000473:pathology; D005133:Eye Movements; D005134:Eye Neoplasms / Q000532:radiotherapy*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D011881:Radiotherapy, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D012984:Software; D014741:Video Recording / Q000295:instrumentation / Q000379:methods