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MetaMaterials antenna for ultra-high field Mri

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Accueil › Events › Anton Nikulin PhD defense

Anton Nikulin PhD defense

septembre 24, 2020

Anton NIKULIN will defend his Ph.D. thesis entitled “Volume RF Coils Based on Metamaterials for Ultra-High Field Magnetic Resonance Imaging”
on Monday, September 28 at 01:00 p.m.
Unfortunately, because of the corona outbreak, the defence will take place online via Zoom :
https://espci.zoom.us/
Abstract :
This manuscript aims to create new kinds of volume radiofrequency coils for UHF MRI (B0 ≥ 7T) derived from the well-known birdcage coil. Their designs are inspired from metamaterials. Based on transmission line analysis, the radiofrequency B1 field and coil’s geometry can be shaped almost at will in order to obtain coils with unique features. At first, we propose a volume coil that eases access to its inner volume. This “opencage” coil does not only improve the comfort during MRI examinations, especially for patients suffering from claustrophobia but it can also be useful for some specific applications of MRI such as motion correction. A small-animal and a head-size prototypes working at 7T have been built and tested. Then we propose to apply this metamaterial approach to develop dual band birdcages that are sensitive simultaneously to two nuclei. Finally, we introduce a new method of passive B1 shimming based on phase conjugation technique. We theoretically investigate this method for developing a head coil for 7T imaging, whereas later we build a prototype for imaging of rodents in a 17.2T scanner.
Supervision : Julien de Rosny and Abdelwaheb Ourir
Biography : Anton Nikulin is a PhD student in Institut Langevin, ESPCI, PSL, CNRS. Anton role in the project is about numerical and experimental study of volume RF coils inspired by metamaterials.

septembre 24, 2020

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 736937