A system comprising a body coil for magnetic resonance imaging and an RF amplifier connected to the body coil and configured for feeding the body coil with an RF signal, wherein the body coil comprises two different ports (21, 22) configured for feeding the RF signal into the body coil, wherein the body coil is provided with a switch configured for selectively activating only one single port (21, 22) for feeding the RF signal to the body coil at a time, thereby allowing for adapting to different load situations of the body coil due to different weights of an examination object, wherein the two ports (21, 22) are located at different locations of the body coil such that the dependence of the reflected part of the RF signal fed into the body coil from the load due to the examination object to which the body coil is applied is different for the two ports (21, 22), and wherein the two ports are located at said different locations such that a function describing the dependence of the reflected part of the RF signal fed into the body coil from the load due to the examination object to which the body coil is applied for the two ports (21, 22), respectively, has a single minimum at a predefined specific load due to the examination object, wherein the predefined specific load due to the examination object defined by the minimum of the function is different for the two ports (21, 22), wherein one predefined specific load corresponds to stronger loading due to a heavy examination object and the other predefined specific load corresponds to a weaker loading due to a lighter examination object, wherein the system further comprises: a measurement unit configured for measuring reflected power of each port (21, 22) at terminals of the RF amplifier. the body coil comprises two different ports (21, 22) configured for feeding the RF signal into the body coil, wherein the body coil is provided with a switch configured for selectively activating only one single port (21, 22) for feeding the RF signal to the body coil at a time, thereby allowing for adapting to different load situations of the body coil due to different weights of an examination object, wherein the two ports (21, 22) are located at different locations of the body coil such that the dependence of the reflected part of the RF signal fed into the body coil from the load due to the examination object to which the body coil is applied is different for the two ports (21, 22), and wherein the two ports are located at said different locations such that a function describing the dependence of the reflected part of the RF signal fed into the body coil from the load due to the examination object to which the body coil is applied for the two ports (21, 22), respectively, has a single minimum at a predefined specific load due to the examination object, wherein the predefined specific load due to the examination object defined by the minimum of the function is different for the two ports (21, 22), wherein one predefined specific load corresponds to stronger loading due to a heavy examination object and the other predefined specific load corresponds to a weaker loading due to a lighter examination object, wherein the system further comprises: a measurement unit configured for measuring reflected power of each port (21, 22) at terminals of the RF amplifier.