Design of, and some clinical experience with, a novel optical surface measurement system in radiotherapy

G. J. Price, T. E. Marchant, J. M. Parkhurst, P. J. Sharrock, G. Whitfield, C. J. Moore

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Optical imaging is bccoming more prevalent in image guided radiotherapy as a complementary technology to traditional ionizing radiation based modalitics. We present a novel structured light based device that can capture a patient's body surface topology with a large field of view and high spatial and temporal resolution. The system is composed of threc cross-caiibrated sensor heads that enable 'wrap around' imaging previously unavailable with similar line of sight optical techniques. The system has becn installed in a treatment bunker at the Christie Hospital alongside an Elekta linear accelerator equipped with cone beam CT (CBCT) on-board imaging. In this paper we describe the system, focussing on the methodologies required to create a robust and practical device. We show examples of measurements madc to ascertain its repeatability and accuracy, and present some initial experiences in using the device for pre-treatment patient set-up. © 2010 SPIE.
    Original languageEnglish
    Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE|Progr. Biomed. Opt. Imaging Proc. SPIE
    Publication statusPublished - 2010
    EventMedical Imaging 2010: Physics of Medical Imaging - San Diego, CA
    Duration: 1 Jul 2010 → …


    ConferenceMedical Imaging 2010: Physics of Medical Imaging
    CitySan Diego, CA
    Period1/07/10 → …


    • Cone beam CT
    • Fourier profilometry
    • Image guided radiotherapy
    • Optical metrology
    • Patient set-up errors


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