Dr. Olivier Roy Profile

Dr. Olivier Roy

Senior Director of Software Engineering at Delphinus Medical Technologies Inc

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 13 March 2017 Paper

3D frequency-domain ultrasound waveform tomography breast imaging

Gursharan Yash Sandhu, Erik West, Cuiping Li, Olivier Roy, Neb Duric

Proceedings Volume 10139, 1013909 (2017) https://doi.org/10.1117/12.2254399

KEYWORDS: Tomography, 3D image processing, Breast, Signal attenuation, Breast imaging, Reconstruction algorithms, Breast cancer, Mammography, Visualization, Ultrasonography, 3D modeling, Wave propagation, Transducers, Cancer

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Proceedings Article | 1 April 2016 Paper

Frequency-domain ultrasound waveform tomography breast attenuation imaging

Gursharan Yash Singh Sandhu, Cuiping Li, Olivier Roy, Erik West, Katelyn Montgomery, Michael Boone, Neb Duric

Proceedings Volume 9790, 97900C (2016) https://doi.org/10.1117/12.2218374

KEYWORDS: Tomography, Signal attenuation, Ultrasonography, Breast, Mammography, Breast cancer, Breast imaging, Visualization, Reconstruction algorithms, Tumor growth modeling, Tissues, Numerical simulations, Transducers, Data modeling, Cancer

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Proceedings Article | 1 April 2016 Paper

Ultrasound breast imaging using frequency domain reverse time migration

O. Roy, M. A. H. Zuberi, R. G. Pratt, N. Duric

Proceedings Volume 9790, 97900B (2016) https://doi.org/10.1117/12.2218366

KEYWORDS: Breast imaging, Ultrasound tomography, Ultrasonography, Data modeling, Breast, Image filtering, Wave propagation, Data acquisition, Transducers, Signal attenuation, Image quality

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Proceedings Article | 17 March 2015 Paper

High-resolution quantitative whole-breast ultrasound: in vivo application using frequency-domain waveform tomography

Gursharan Sandhu, Cuiping Li, Olivier Roy, Steven Schmidt, Neb Duric

Proceedings Volume 9419, 94190D (2015) https://doi.org/10.1117/12.2081227

KEYWORDS: Tomography, Breast, Magnetic resonance imaging, Prototyping, Tissues, Data acquisition, Tumors, In vivo imaging, Ultrasonography, Ultrasound tomography

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Proceedings Article | 17 March 2015 Paper

Whole breast tissue characterization with ultrasound tomography

Neb Duric, Peter Littrup, Cuiping Li, Olivier Roy, Steve Schmidt, John Seamans, Andrea Wallen, Lisa Bey-Knight

Proceedings Volume 9419, 94190G (2015) https://doi.org/10.1117/12.2083203

KEYWORDS: Breast, Cancer, Tissues, Ultrasonography, In vivo imaging, Mammography, Elastography, Signal attenuation, Ultrasound tomography, Imaging systems

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Proceedings Article | 20 March 2014 Paper

Breast imaging with SoftVue: initial clinical evaluation

Neb Duric, Peter Littrup, Cuiping Li, Olivier Roy, Steven Schmidt, Xiaoyang Cheng, John Seamans, Andrea Wallen, Lisa Bey-Knight

Proceedings Volume 9040, 90400V (2014) https://doi.org/10.1117/12.2043768

KEYWORDS: Breast, Imaging systems, Magnetic resonance imaging, Cancer, Tissues, Image fusion, Image processing, Breast imaging, Signal attenuation, Ultrasonography

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Proceedings Article | 20 March 2014 Paper

Breast boundary detection with active contours

I. Balic, P. Goyal, O. Roy, N. Duric

Proceedings Volume 9040, 90400D (2014) https://doi.org/10.1117/12.2043414

KEYWORDS: Breast, Signal attenuation, Image segmentation, Chest, Ultrasound tomography, Ultrasonography, Transducers, Nipple, 3D image processing, Optimization (mathematics)

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Proceedings Article | 20 March 2014 Paper

Toward a practical ultrasound waveform tomography algorithm for improving breast imaging

Cuiping Li, Gursharan Sandhu, Olivier Roy, Neb Duric, Veerendra Allada, Steven Schmidt

Proceedings Volume 9040, 90401P (2014) https://doi.org/10.1117/12.2043686

KEYWORDS: Tomography, Signal attenuation, Ultrasonography, Breast, Data modeling, Breast imaging, Tissues, Ultrasound tomography, Medical imaging, Wave propagation

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Proceedings Article | 29 March 2013 Open Access

Breast imaging with the SoftVue imaging system: first results

Neb Duric, Peter Littrup, Steven Schmidt, Cuiping Li, Olivier Roy, Lisa Bey-Knight, Roman Janer, Dave Kunz, Xiaoyang Chen, Jeffrey Goll, Andrea Wallen, Fouzaan Zafar, Veerendra Allada, Erik West, Ivana Jovanovic, Kuo Li, William Greenway

Proceedings Volume 8675, 86750K (2013) https://doi.org/10.1117/12.2002513

KEYWORDS: Breast, Prototyping, Imaging systems, Cancer, Tissues, Ultrasonography, Mammography, Breast cancer, Breast imaging, Signal attenuation

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Proceedings Article | 25 February 2012 Paper

Breast ultrasound tomography: bridging the gap to clinical practice

Neb Duric, Peter Littrup, Cuiping Li, Olivier Roy, Steven Schmidt, Roman Janer, Xiaoyang Cheng, Jeffrey Goll, Olsi Rama, Lisa Bey-Knight, William Greenway

Proceedings Volume 8320, 83200O (2012) https://doi.org/10.1117/12.910988

KEYWORDS: Breast, Prototyping, Scanners, Breast cancer, Magnetic resonance imaging, Transducers, Cancer, Ultrasound tomography, Mammography, Data acquisition

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Conventional sonography, which performs well in dense breast tissue and is comfortable and radiation-free, is not practical for screening because of its operator dependence and the time needed to scan the whole breast. While magnetic resonance imaging (MRI) can significantly improve on these limitations, it is also not practical because it has long been prohibitively expensive for routine use. There is therefore a need for an alternative breast imaging method that obviates the constraints of these standard imaging modalities. The lack of such an alternative is a barrier to dramatically impacting mortality (about 45,000 women in the US per year) and morbidity from breast cancer because, currently, there is a trade-off between the cost effectiveness of mammography and sonography on the one hand and the imaging accuracy of MRI on the other. This paper presents a progress report on our long term goal to eliminate this trade-off and thereby improve breast cancer survival rates and decrease unnecessary biopsies through the introduction of safe, cost-effective, operatorindependent sonography that can rival MRI in accuracy. The objective of the study described in this paper was to design and build an improved ultrasound tomography (UST) scanner in support of our goals. To that end, we report on a design that builds on our current research prototype. The design of the new scanner is based on a comparison of the capabilities of our existing prototype and the performance needed for clinical efficacy. The performance gap was quantified by using clinical studies to establish the baseline performance of the research prototype, and using known MRI capabilities to establish the required performance. Simulation software was used to determine the basic operating characteristics of an improved scanner that would provide the necessary performance. Design elements focused on transducer geometry, which in turn drove the data acquisition system and the image reconstruction engine specifications. The feasibility of UST established by our earlier work and that of other groups, forms the rationale for developing a UST system that has the potential to become a practical, low-cost device for breast cancer screening and diagnosis.

Proceedings Article | 24 February 2012 Paper

Travel time denoising in ultrasound tomography

O. Roy, C. Li, N. Duric

Proceedings Volume 8320, 832006 (2012) https://doi.org/10.1117/12.911919

KEYWORDS: Denoising, Transducers, Time metrology, Computer programming, Tomography, Breast, Ultrasound tomography, Receivers, Signal to noise ratio, Ultrasonography

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Proceedings Article | 25 March 2011 Paper

Robust array calibration using time delays with application to ultrasound tomography

O. Roy, I. Jovanović, N. Durić, L. Poulo, M. Vetterli

Proceedings Volume 7968, 796806 (2011) https://doi.org/10.1117/12.877459

KEYWORDS: Transducers, Calibration, Denoising, Signal to noise ratio, Ultrasonography, Error analysis, Breast cancer, Ultrasound tomography, Tomography, Time metrology

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Proceedings Article | 25 March 2011 Paper

Modification of Kirchhoff migration with variable sound speed and attenuation for tomographic imaging of the breast

Steven Schmidt, Olivier Roy, Cuiping Li, Nebojsa Duric, Zhi-Feng Huang

Proceedings Volume 7968, 796804 (2011) https://doi.org/10.1117/12.878210

KEYWORDS: Signal attenuation, Breast, Reflection, Ultrasonography, Tissues, Signal detection, Receivers, Transducers, Mammography, Image transmission

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Proceedings Article | 12 March 2010 Paper

Robust ultrasound travel-time tomography using the bent ray model

Ali Hormati, Ivana Jovanović, Olivier Roy, Martin Vetterli

Proceedings Volume 7629, 76290I (2010) https://doi.org/10.1117/12.844693

KEYWORDS: Inverse problems, Breast, Ultrasonography, Reconstruction algorithms, Tomography, Data modeling, Acoustics, Receivers, Scanners, Wavelets

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Proceedings Article | 12 March 2010 Paper

Sound speed estimation using wave-based ultrasound tomography: theory and GPU implementation

O. Roy, I. Jovanović, A. Hormati, R. Parhizkar, M. Vetterli

Proceedings Volume 7629, 76290J (2010) https://doi.org/10.1117/12.844691

KEYWORDS: Wave propagation, Ultrasound tomography, Reconstruction algorithms, Computer simulations, Ultrasonography, Transducers, Finite difference methods, Scanners, Breast cancer, Breast

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Showing 5 of 15 publications

Conference Committee Involvement (11)