Meeting Banner
Abstract #3266

The Correlation Between Pennation Angle and the Image Quality of Skeletal Muscle Fiber Tractography Using the Deterministic Diffusion Tensor Imaging

Yoshikazu Okamoto1, Toru Okamoto2, Yuka Kujiraoka2

1University of Tsukuba Hospital , Tsukuba, Ibaraki, Japan; 2Tsukuba memorial hospital

Fourteen volunteers were scanned using deterministic diffusion tensor imaging (DTI), and six fiber tractographs were constructed from a unilateral calf of each volunteer and the gfiber densityh was calculated in each of the tractographs. The average pennation angle (AVPA) and angle variation (SDPA) were also measured for each muscle by ultrasonography (US) in the same region as the MRI scan. For all eighty-four tractography images, the correlation coefficient between the fiber density and AVPA or SDPA were well correlated (R= 0,715 and -0.472, respectively). Our data suggest that a larger, more variable pennation angle resulted in worse skeletal muscle tractography.

Keywords

ability acids acquisition actual addition adjacent ages analyzed anisotropic anisotropy anterior around ascertain aspects available best bilateral body calculations calf calves caudal clinical coefficient coil consecutively console contributed correlated correlation corresponded cranial cross defined densities density described deterministic deviation diffusion directionality distance distributed dorsal dotted dual eigenvalues eighty equation erroneous existed fatty female females fiber fibers findings formed fourteen fractional gender generated graphs highest hospital hypothesized identical included indicating internal intracellular japan length linear long males marking matrix measured medium memorial micrometer mode motion muscle muscles nonparametric normally nova numerous operator panoramic parallel participated percentage physiological placed popular possibility posterior previously probe property prospective quality rank reconstruction rectangular reflects report reported resolution respect restricted scanned scanning sense seven shot side sides skeletal skin slice slices slow spin statistically stops strong strongly structures successfully suggest table taken tensor track tracking tract twitch unilateral variable variation variations view volunteer volunteers water whether worse