Abstract
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 language | English |
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Title of host publication | Progress in Biomedical Optics and Imaging - Proceedings of SPIE|Progr. Biomed. Opt. Imaging Proc. SPIE |
Volume | 7622 |
DOIs | |
Publication status | Published - 2010 |
Event | Medical Imaging 2010: Physics of Medical Imaging - San Diego, CA Duration: 1 Jul 2010 → … |
Conference
Conference | Medical Imaging 2010: Physics of Medical Imaging |
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City | San Diego, CA |
Period | 1/07/10 → … |
Keywords
- Cone beam CT
- Fourier profilometry
- Image guided radiotherapy
- Optical metrology
- Patient set-up errors