Details

Autor(en) / Beteiligte

• Bensamoun, Sabine F.
• Ringleb, Stacie I.
• Littrell, Laurel
• Chen, Qingshan
• Brennan, Michael
• Ehman, Richard L.
• An, Kai-Nan

Titel

Determination of thigh muscle stiffness using magnetic resonance elastography

Ist Teil von

• Journal of magnetic resonance imaging, 2006-02, Vol.23 (2), p.242-247

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

Erscheinungsjahr

2006

Link zum Volltext

Quelle

Wiley HSS Collection

Beschreibungen/Notizen

• Purpose To measure the elastic properties of the vastus lateralis (VL), vastus medialis (VM), and sartorius (Sr) muscles using magnetic resonance elastography (MRE). Materials and Methods To obtain a normative database of the aforementioned muscles, oblique scan directions were prescribed passing through each muscle. Shear waves were induced into the muscles using pneumatic and mechanical drivers at 90 and 120 Hz, respectively. These drivers were attached to the distal end of the right thigh with the knee flexed at 30°. The foot was placed in a footplate containing MR‐compatible load cells to record the force during a contraction (10% and 20% of the maximum voluntary contraction). Results The shear moduli measured at rest in the VL (N = 12), VM (N = 14), and Sr (N = 13) were 3.73 ± 0.85 kPa, 3.91 ± 1.15 kPa, and 7.53 ± 1.63 kPa, respectively. The stiffness of both vasti increased with the level of contraction, while the stiffness of the Sr remained the same. Conclusion The MRE technique was able to approximate the stiffness of different thigh muscles. Furthermore, the wave length was sensitive to the morphology (unipennate or longitudinal) and fiber composition (type I or II) in each muscle. J. Magn. Reson. Imaging 2006. © 2005 Wiley‐Liss, Inc.