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

doi:10.1117/12.844138

23 March 2010 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

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76224B (2010) https://doi.org/10.1117/12.844138
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.844138

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