Systematic Analysis of the Improvements in Magnetic Resonance Microscopy with Ferroelectric Composite Ceramics. Issue 30 (17th May 2019)

• Record Type: Journal Article
• Authors: Moussu, Marine A. C.; Ciobanu, Luisa; Kurdjumov, Sergej; Nenasheva, Elizaveta; Djemai, Boucif; Dubois, Marc; Webb, Andrew G.; Enoch, Stefan; Belov, Pavel; Abdeddaim, Redha; Glybovski, Stanislav
• Is Part Of: Advanced materials. Volume 31:Issue 30(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-17
• Subjects: ceramics -- dielectric probes -- ferroelectric composites -- microscopy -- MRI; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201900912
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: The spatial resolution and signal‐to‐noise ratio (SNR) attainable in magnetic resonance microscopy (MRM) are limited by intrinsic probe losses and probe–sample interactions. In this work, the possibility to exceed the SNR of a standard solenoid coil by more than a factor‐of‐two is demonstrated theoretically and experimentally. This improvement is achieved by exciting the first transverse electric mode of a low‐loss ceramic resonator instead of using the quasi‐static field of the metal‐wire solenoid coil. Based on theoretical considerations, a new probe for microscopy at 17 T is developed as a dielectric ring resonator made of ferroelectric/dielectric low‐loss composite ceramics precisely tunable via temperature control. Besides the twofold increase in SNR, compared with the solenoid probe, the proposed ceramic probe does not cause static‐field inhomogeneity and related image distortion. Abstract : Signal‐to‐noise ratio improvement in magnetic resonance microscopy using a low‐loss ceramic resonator instead of a conventional metal‐wire solenoid coil is theoretically and experimentally demonstrated. The resonator is made of ferroelectric/dielectric low‐loss composite ceramics and achieves two‐fold improvement at 17 T due to the excitation of its first transverse electric mode.