Nina F. Schwenzer1,2, Gnter Steidle2, Petros Martirosian2, Christina Schraml1, Fabian Springer1, Claus D. Claussen1, Fritz Schick2
1Department of Diagnostic and Interventional Radiology, University Hospital of Tbingen, Tbingen, BW, Germany; 2Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital of Tbingen, Tbingen, BW, Germany
Diffusion tensor imaging (DTI) is able to display diffusional anisotropy of tissue. It is known that the muscle has a highly ordered microarchitecture. It seems plausible that water diffusivity within the muscle will change with length since the cross sectional area of the muscle increases with shortening. This could have an influence on diffusivity and fractional anisotropy (FA). Our results showed that the FA significantly decreased and the mean diffusivity increased with muscle shortening. Regarding the eigenvalues of the diffusion tensor, l2 and l3 showed significant changes in relation to muscle length while no change in l1 could be found.