NDLI: Next generation optical surface sensing for real-time measurement in radiotherapy

Content Provider	IEEE Xplore Digital Library
Author	Parkhurst, J.M. Price, G.J. Sharrock, P.J. Marchant, T.E. Moore, C.J.
Copyright Year	2011
Description	Author affiliation: North Western Medical Physics at The Christie NHS Foundation Trust (Price, G.J.; Sharrock, P.J.; Marchant, T.E.; Moore, C.J.) \|\| North Western Medical Physics at The Christie NHS Foundation Trust, Manchester, M20 4BX, UK (Parkhurst, J.M.)
Abstract	With the introduction of intensive new treatments such as hypo-fractionation and proton beam therapy, localization of the tumor target volume and tracking of points across the skin entrance surface have become critically important. Optical metrology has been used to monitor the patient's bulk position and motion throughout treatment. However systems have not been capable of high temporal and spatial resolution whole-surface topology measurement. We describe the implementation of such a system based on Fourier profilometry. Its algorithm is split into four separate processing stages, including spatial phase determination: descriptions of each stage are given along with the modifications made to increase performance. The optimized system is capable of processing 23 frames per second (fps), with each frame providing 512×512 measured points. The data density, accuracy and performance of the system are an order of magnitude improvement on commercially available clinical systems. We show that this performance permits genuinely real-time measurement of a patient, live during both setup and radiation treatment delivery. It is also fast enough to provide smooth dynamic visualizations of motion at all points on the wraparound body surface for radiotherapy staff and intuitive, direct feed-back to patients.
Starting Page	6170
Ending Page	6173
File Size	418353
Page Count	4
File Format	PDF
ISBN	9781424441211
ISSN	1557170X
e-ISBN	9781457715891
e-ISBN	9781424441228
DOI	10.1109/IEMBS.2011.6091524
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface treatment Optical sensors Real time systems Optical variables measurement Software Accuracy Software algorithms
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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