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23 March 2010 Design of, and some clinical experience with, a novel optical surface measurement system in radiotherapy
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Optical imaging is becoming more prevalent in image guided radiotherapy as a complementary technology to traditional ionizing radiation based modalities. 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 three cross-calibrated sensor heads that enable 'wrap around' imaging previously unavailable with similar line of sight optical techniques. The system has been 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 made to ascertain its repeatability and accuracy, and present some initial experiences in using the device for pre-treatment patient set-up.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. J. Price, T. E. Marchant, J. M. Parkhurst, P. J. Sharrock, G. Whitfield, and C. J. Moore "Design of, and some clinical experience with, a novel optical surface measurement system in radiotherapy", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76224B (23 March 2010);


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