Two Post-doctoral positions in 3D X-ray imaging at LOA, Paris and Bordeaux, France

Laboratoire d’Optique Appliquée (LOA) is developing a new 3D X-ray imaging technique, called plenoptic, based on the combination of main optic and wavefront sensor. Three systems have been built. The first one was a demonstrator running at PETRA III synchrotron in Germany at an energy of 11 keV. It is now disassembled. One camera is set and aims at imaging living biological cells. It is working around 400 eV. The second system is targeting small animal imaging with X-rays of energy around 17 keV. Both systems are tabletop.

Both systems still need to be fully tested and improved. The low energy camera is running at LOA, near Paris, while the high energy system is set at Imagine Optic company in Bordeaux, France. LOA’s team is in charge of running an improving both systems through a collaboration agreement.

The plenoptic camera creates an array of sub-images. By numerically treating these sub-images, it is possible to perform numerical refocusing and thus to recover a 3D view of the sample in a single exposure. Today, the data treatment uses classical plenoptic software developed long ago. However, these softwares are slow and not so efficient for 3D retrieval. We are considering setting up disparity and artificial intelligence software to ensure faster 3D retrieval.

One post-doctoral position is open on data treatment. Thesis on machine vision, disparity or artificial intelligence will be a plus.

One post-doctoral position is open on experiment. No specific experience is required.

Both positions are opened for 18 months starting on September 2021, extension or opening of permanent position in Bordeaux might be considered.

Contact: philippe.zeitoun@ensta.fr