Film—General

High Temperature Superconducting Radio Frequency Coils for NMR Spectroscopy and Magnetic Resonance Imaging

“…The most direct way to maximize the S/N is to use the strongest static magnetic field, B 0 , possible. It is found that the voltage S/N ratio scales 8,9]. One power of B 0 comes from the fact that the magnetization M of the (paramagnetic) sample increases linearly with B 0 , and a second power of B 0 comes about because the rf voltage inductively picked up by the receive coil scales with ω precession , which is directly proportional to B 0 .…”

“…The rf matching network also can be cooled, or even made superconducting [11]. Finally, the transmit/receive switch also can be kept at cryogenic temperature to minimize noise and losses [9].…”