Paper 11.138

G. Price et al., "Real Time Optical Patient Surface Motion Monitoring During Radiotherapy", in Proc. of 2nd Int. Conf. on 3D Body Scanning Technologies, Lugano, Switzerland, 2011, pp. 138-144,


Real Time Optical Patient Surface Motion Monitoring During Radiotherapy



North Western Medical Physics, The Christie NHS Foundation Trust, Manchester, UK


The increasing use of aggressive radiotherapy treatment regimes means that patient monitoring during treatment delivery is assuming greater importance in image guided radiotherapy. Optical metrology to measure and correct bulk positional offsets has previously been demonstrated in this respect, but systems have not had the capability to offer high spatial and temporal resolution dynamic monitoring of wide field skin surfaces. We describe the implementation of a genuinely real-time optical skin surface measurement system, based on Fourier profilometry, and its clinical application in a radiotherapy treatment room. The system is capable of processing (image capture through to display) ~23 frames per second at 512x512 resolution. Three camera-projector pairs may be operated synchronously to provide a "wrap-around" surface, overcoming the line of sight limitations of the structured light projection approach. In addition to describing our implementation of the surface calculation algorithm, we additionally describe an application that we are currently evaluating in a volunteer study: the use of visual feedback of live body surfaces to reduce patient motion.


Fourier profilometry, image guided radiotherapy, patient motion, medical imaging


Full paper: 11.138.pdf
Proceedings: 3DBST 2011, 25-26 Oct. 2011, Lugano, Switzerland
Pages: 138-144

Copyright notice

© Hometrica Consulting - Dr. Nicola D'Apuzzo, Switzerland,
Reproduction of the proceedings or any parts thereof (excluding short quotations for the use in the preparation of reviews and technical and scientific papers) may be made only after obtaining the specific approval of the publisher. The papers appearing in the proceedings reflect the author's opinions. Their inclusion in these publications does not necessary constitute endorsement by the editor or by the publisher. Authors retain all rights to individual papers.

Proceedings of 3DBODY.TECH International Conferences on 3D Body Scanning & Processing Technologies, © Hometrica Consulting, Switzerland