Emmanuel Roux, PhD

 

Welcome on my personal webpage !

It contains:

Abstract of my PhD Manuscript

Manuscript and supplementary materials

A short biography

Publications

To contact me, feel free to send an email to emmanuel.roux [@] creatis.univ-lyon1.fr

Best waves,

Emmanuel

 

 

Abtract

2D sparse array design optimization and operating strategy for real-time 3D ultrasound imaging

Today, the use of 3D ultrasound imaging in cardiology is limited because imaging the entire myocardium on a single heartbeat, without apnea, remains a technological challenge. A solution consists in reducing the number of active elements in the 2D ultrasound probes to lighten the acquisition process: this approach leads to sparse arrays. The aim of this thesis is to propose the best configuration of a given number of active elements distributed on the probe active surface in order to maximize their ability to produce images with homogeneous contrast and resolution over the entire volume of interest. This work presents the integration of realistic acoustic simulations performed in a stochastic optimization process (simulated annealing algorithm). The proposed sparse array design framework is general enough to be applied on both on-grid (active elements located on a regular grid) and non-grid (arbitrary positioning of the active elements) arrays. The introduction of an innovative energy function sculpts the optimal 3D beam pattern radiated by the array. The obtained optimized results have 128, 192 or 256 active elements to help their compatibility with currently commercialized ultrasound scanners, potentially allowing a large scale development of 3D ultrasound imaging with low cost systems.

 

Manuscript and Supplementary material

 

Download: PhD manuscript (PDF)

Optimization run videos

TABLE: Optimizaton run videos (Click on the links and then come back here with the link bellow each video)
CHAPTER III (NON-GRIG ARRAYS) CHAPTER 4 (ON-GRID ARRAYS)
Single depth Multi-depth Multi-depth
U1 1HS U1 3HS opti128
U2 1HS U2 3HS opti192
U3 1HS U3 3HS opti256

Short Biography

I was born in Firminy (France). In 2013 I both graduated in Electrical and Electronics Engineering and received the M.Sc. degree in Science for Technologies and Health from Lyon National Institute of Applied Sciences (INSA-Lyon).

Currently I am a  post-doc at the University of Florence in collaboration with the University of Lyon. I defended a co-supervised Ph.D. in Acoustics and Information Engineering at both University of Lyon (CREATIS Laboratory) and University of Florence (MSD-Lab). My PhD focused on the optimization of 2-D transducers for 3-D ultrasound imaging. My teaching activities are related to Applied Mathematics in the Electrical Engineering Department of the Technical Institute of Université Claude Bernard Lyon 1. I am seriously interested in engineering and research with 3-D acoustics, stochastic optimization and information processing for health and entertainment sectors.

Publications (Google Scholar Profile)

 Journals

 [1]          E. Roux, A. Ramalli, P. Tortoli, C. Cachard, M. Robini, and H. Liebgott, “Wideband 2D array design optimization with fabrication constraints for 3D US imagingIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control (Special Edition), Jan. 2017, vol. 64, no. 1, pp. (published Oct. 2016, 3rd on IEEE Explore - printed release in Jan. 2017)

doi: 10.1109/TUFFC.2016.2614776

 [2]          E. Roux, A. Ramalli, P. Tortoli, C. Cachard, M. Robini, and H. Liebgott, “2D ultrasound sparse arrays multi-depth radiation optimization using simulated annealing and spiral-array inspired energy functionsIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Dec. 2016, vol. 63, no. 12, pp. 2138–2149

doi: 10.1109/TUFFC.2016.2602242

 International conferences

 [3]          B. DiarraE. RouxH. Liebgott, S. Ravi, M. Robini, P. Tortoli, and C. Cachard, “Comparison of different optimized irregular sparse 2D ultrasound arrays” in IEEE International Ultrasonics Symposium (IUS), 2016, pp. 1-4

 [4]          E. Roux, A. Ramalli, M. Robini, H. Liebgott, C. Cachard, and P. Tortoli, “Spiral array inspired multi-depth cost function for 2D sparse array optimization” in IEEE International Ultrasonics Symposium (IUS), 2015, pp. 1–4.

 [5]          E. Roux, A. Ramalli, P. Tortoli, C. Cachard, M. Robini, and H. Liebgott, “Speed-up of acoustic simulation techniques for 2D sparse array optimization by simulated annealing” in IEEE International Ultrasonics Symposium (IUS), 2015, pp. 1–4.

 [6]          E. Roux, B. Diarra, M. Robini, C. Cachard, P. Tortoli, and H. Liebgott, “Realistic acoustic simulation of 2-D probe elements in simulated annealing sparse array optimization” in IEEE International Ultrasonics Symposium (IUS), 2014, pp. 2125–2128.

 [7]          B. Diarra, M. Robini, E. Roux, H. Liebgott, C. Cachard, and P. Tortoli, “Optimization of free-moving elements in 2D ultrasound sparse arrays” in IEEE International Ultrasonics Symposium (IUS), 2014, pp. 2189–2192. 

National conferences

 [8]          E. Roux, M. C. Robini, A. Ramalli, P. Tortoli, C. Cachard, and H. Liebgott, “Modélisation et simulation acoustique pour l’optimisation de sondes échographiques 2D par recuit simulé” in XXVème Colloque GRETSI, Lyon, France, 2015.

 [9]          E. Roux, A. Ramalli, P. Tortoli, M. Robini, H. Liebgott, and C. Cachard, “Optimisation du rayonnement acoustique de sondes parcimonieuses pour l’échographie 3D temps-réel” 22ème Congrès Fr. Mécanique 24 Au 28 Août 2015 Lyon Fr. FR, 2015.

Front cover image

 [10]          Ramalli, A., E. Boni, E. Roux, and P. Tortoli. 2015. “Density-Tapered Sunflower: A Deterministic Sparse Array SolutionIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control [Cover] 62 (8): c1–2. doi:10.1109/TUFFC.2015.620801.

 

 

 

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

The content that is displayed on this video screen is the following:• Top-left panel: the evolution of the active elements distribution on the layout.• Top-center panel: the evolution of the energy function values.• Top-right panel: the evolution of the acceptation rate values.• Bottom line panels: the evolution of the beam pattern profiles at the depths where the optimization occurred.

BACK TO THE VIDEO LIST

Presenting [3] in Taipei (Taiwan), Oct. 2015

compteur gratuit