[Muscle tissue relaxation times after experimental injuries]

The proton relaxation times of muscles in the limbs of rats were measured after various types of experimental injury. Abnormalities of perfusion, the effect of histamine and of a non-specific myositis resulted in a significant prolongation of T1 and T2 in in-vitro experiments. It must be remembered that these were serious types of injury. It may be possible to demonstrate less extensive muscle changes by means of MR.