All polymer cryogen free cryostat for μ-MRI application at clinical field

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Authelet, G.^1 ; Bonelli, A.^1 ; Poirier-Quinot, M.^2 ; Ginefri, J.-C.^2 ; Saniour, I.^2 ; Baudouy, B.^1

Irfu CEA, Unversite Paris-Saclay, Gif-sur-Yvette

F-91191, France^1

IR4M UMR8081, Universite Paris-Sud/CNRS, Universite Paris-Saclay, Orsay, France^2

关键词: Biological samples;    Detection sensitivity;    Electromagnetic perturbations;    Polymer materials;    Radio frequencies;    Spatial resolution;    Superconducting state;    Thermal characterization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012156/pdf
DOI  :  10.1088/1757-899X/502/1/012156

来源: IOP

【 摘 要 】

To improve the detection sensitivity of Micro Magnetic Resonance Imaging (μ-MRI) in humans, small animals or biological sample, it is necessary to reach higher spatial resolution. Radio Frequency (RF) YBaCuO film coils, in superconducting state, are used for that purpose, instead of copper coils. In working condition, these miniature RF coils are located in clinical MRI scanners (few Tesla) and very closed to the biological sample under investigation. A non magnetic cryostat has been designed and constructed to operate these RF coils in this particular medical environment. This cryostat is principally made of polymer materials to reduce the electromagnetic perturbations to the MRI magnet and the cryogenic scheme has been chosen to be cryogen free. In this paper, we describe the cryostat and present the experimental thermal characterizations and the first images obtained in a clinical MRI scanner.