This body coil is specially made for mice and rats. Through tuning it is suitable as well for proton as fluorine.
The tuning is done in two different ways, depending on the mr system.
One way is shifting a shield over a fluorine coil and thus tuning it in to a proton coil.
The second way is two different coils, one proton and one fluorine, by shifting one or the other over the sample.
Depending on the system, this way there can be achieved maximum sensitivity on the results.