title: Joint position affects muscle proton diffusion: Evaluation with a 3-T MR system.
abstract: OBJECTIVE
  To determine whether joint position affects muscle proton diffusion, fractional anisotropy and primary (lambda(1)), secondary (lambda(2)), and tertiary (lambda(3)) eigenvalues of calf muscles were compared among ankle positions of plantar flexion, intermediate, and dorsiflexion.
  
  
  CONCLUSIONS
  In tibialis anterior, fractional anisotropy and lambda(1) decreased, but lambda(2) and lambda(3) increased (p < 0.01) as the joint angle increased. Opposite results were obtained for the gastrocnemius and soleus (p < 0.05). These results indicate that joint position affects muscle proton diffusion.
authors.affiliation: Department of Clinical Radiology, Kyushu University, Fukuoka City, Japan. mhatake@radiol.med.kyushu-u.ac.jp
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Hatakenaka
authors.forename: Hidetake
authors.initials: H
authors.lastname: Yabuuchi
authors.forename: Shunya
authors.initials: S
authors.lastname: Sunami
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kamitani
authors.forename: Yukihisa
authors.initials: Y
authors.lastname: Takayama
authors.forename: Kei
authors.initials: K
authors.lastname: Nishikawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Honda
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D016880:Anisotropy; D006801:Humans; D007596:Joints / Q000502:physiology*; D007866:Leg / Q000502:physiology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011446:Prospective Studies; D011522:Protons
chemical_list: D011522:Protons