as illustrated above a retroaction of the individual antennas of the local coil on the preamplifiers represents an additional problem that leads to an amplified internal noise of the inherently low noise preamplifiers a first solution of this problem is to use an adaptation and decoupling circuit eks this is fashioned as an adaptation and decoupling matrix and arranged between the individual antennas ba of the readout coil as and the preamplifiers vs the adaptation and decoupling circuit eks possesses capacitance diodes and is adjustable via variable reactances for different local coil arrangements a second solution not shown here to the problem is to reduce the internal noise of the preamplifier via cooling to cryogenic temperatures for example to 80 k a significant improvement is thereby achieved in the individual antenna arrays described in the preceding which are inductively coupled relative to fig1 fig7 shows an advantageous development of the arrangement according to the invention a 90 u00b0 phase shifter is interconnected between each acquisition antenna ba of the readout coil as and the respective associated preamplifier vs every preamplifier vs thereby exhibits a high input impedance due to the phase electrical length of the connection the input impedance of the.