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PhD position - 4D ultrasonic imaging with fast reconstruction algorithms in the Fourier domain and data compression
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JOB DETAILS
Published: 1 month ago
Application deadline: Oct 31
Location: Grenoble, France
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PhD position - 4D ultrasonic imaging with fast reconstruction algorithms in the Fourier domain and data compression

SL-DRT-19-0677

RESEARCH FIELD

Mathematics - Numerical analysis - Simulation

ABSTRACT

Ultrasonic array imaging is now a widespread technique in the field of non-destructive testing, and most industrial systems are able to image structures in real-time with arrays typically consisting of 64 elements. For larger arrays with 128 or 256 elements, the imaging systems are slowed down considerably because of the large volume of signals to be transferred from the acquisition unit to the processing unit, and the number of computational operations to form a large image. A typical example is 3D imaging with 16x16 matrix arrays requiring the transfer of 256x256 signals and the computation of 10e6 to 10e8 voxels to form 3D images. In this context, the thesis aims to accelerate imaging systems by optimizing the data transfer with compressed sensing techniques and by exploiting fast reconstruction algorithms in the Fourier domain, these are able to reduce computations time of images by a factor of 300 compared to more conventional methods operating in the time domain. Finally, another point that will be addressed at the end of the thesis is the reduction of the number of signals with various techniques, such as random plane-wave emissions or sparse arrays in receive mode.

LOCATION

Département Imagerie Simulation pour le Contrôle (LIST)

Laboratoire Instrumentation et Capteurs

Saclay

CONTACT PERSON

ROBERT Sébastien

CEA

DRT/DISC

CEA, LISTDépartement Imagerie et Simulation pour le ContrôleBât. 565 – Point Courier 12091191 Gif-sur-Yvette Cedex

Phone number: 01 69 08 19 56

Email: sebastien.robert@cea.fr

UNIVERSITY / GRADUATE SCHOOL

Paris Sciences et Lettres

Physique en Île-de-France (EDPIF)

FIND OUT MORE

http://www-list.cea.fr/

START DATE

Start date on 01-10-2019

THESIS SUPERVISOR

PRADA Claire

Institut Langevin - ESPCI

UMR 7587 CNRS

Institut Langevin1 rue Jussieu75238 PARIS Cedex 05

Phone number: 01.40.79.46.93

Email: claire.prada-julia@espci.fr

« The age limit is 26 years for PhD offers and 30 years old for post-doc offers. »

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