Surface coils and magnetic resonance devices

A surface coil, comprising:

• a radio frequency coil, a transmission line, and a preamplifier, wherein
• the radio frequency coil includes at least one coil unit and a flexible conductive wire, wherein the flexible conductive wire is wound into at least one loop to form the at least one coil unit, the at least one coil unit receives a magnetic resonance signal, the flexible conductive wire includes at least one tuning transmission segment, the at least one tuning transmission segment is a part of the flexible conductive wire, and the at least one tuning transmission segment is functional as a tuning capacitor;
• one end of the transmission line is connected to the radio frequency coil, another end of the transmission line extends out of the radio frequency coil and is connected to the preamplifier, and the transmission line is configured to perform impedance transformations between the radio frequency coil and the preamplifier and transmit the magnetic resonance signal received by the radio frequency coil to the preamplifier;
• and
• the preamplifier receives and amplifies the magnetic resonance signal received by the radio frequency coil.