A multi-purpose, rolled-up, double-helix resonator

• Published in: Journal of magnetic resonance (1997) 2019-12, Vol.309, p.106599-106599, Article 106599
• Main Authors: Silva, Pedro F., Delgado, Saraí M. Torres, Jouda, Mazin, Mager, Dario, Korvink, Jan G.
• Format: Article
• Language: English
• Subjects: Adjustable self-resonance; Commercial front-end; Double helix; Transverse volume resonator
• ISSN: 1090-7807; 1096-0856
• DOI: 10.1016/j.jmr.2019.106599

[Display omitted] •Optimised implementation of the best transverse resonator design known.•Large winding number in the axial and radial directions allows for a high sensitivity design.•Specially shaped current path filaments, combined with rolling and fixation pads, lead to a volume coil despite original planar fabrication.•Adjustable design allows for varying electrical and mechanical responses. Multilayer flexible substrates offer a means to combine high lateral precision and resolution with roll-up processes, allowing layer-based manufacturing to reach into the third dimension. Here we explore this combination to achieve an otherwise hard-to-manufacture resonator geometry: the double-helix. The use of commercial flexPCB technology enabled optimal winding connections and a versatile adjustment to various operation fields, sample volumes and resonance numbers. The sensitivity of the design is shown to greatly benefit from the fabrication method, though optimal electrical connections and several radially-wound windings, and was measured to outperform an equivalent solenoid despite the known geometrical disadvantage.