Real-time optical measurement of the dynamic body surface for use in guided radiotherapy

G. J. Price, J. M. Parkhurst, P. J. Sharrock, C. J. Moore

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Optical measurements are increasingly used in radiotherapy. In this paper we present, in detail, the design and implementation of a multi-channel optical system optimized for fast, high spatial resolution, dynamic body surface measurement in guided therapy. We include all algorithmic modifications and calibration procedures required to create a robust, practical system for clinical use. Comprehensive static and dynamic phantom validation measurements in the radiotherapy treatment room show: conformance with simultaneously measured cone beam CT data to within 1 mm over 62% ± 8% of the surface and 2 mm over 90% ± 3%; agreement with the measured radius of a precision geometrical phantom to within 1 mm; and true real-time performance with image capture through to surface display at 23 Hz. An example patient dataset is additionally included, indicating similar performance in the clinic.
    Original languageEnglish
    Pages (from-to)415-436
    Number of pages22
    JournalPhysics in Medicine and Biology
    Volume57
    Issue number2
    DOIs
    Publication statusPublished - 21 Jan 2012

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