Quantification of the Elastic Property of Normal Thigh Muscles Using MR Elastography: Our Initial Experience
Purpose This study aimed to apply MR elastography (MRE) to achieve in vivo evaluation of the elastic properties of thigh muscles and validate the feasibility of quantifying the elasticity of normal thigh muscles using MRE. Materials and Methods This prospective study included 10 volunteer subject...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN KO |
| Publicado: |
The Korean Society of Radiology
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/ce001a26c62f4ba9834de17e33aab076 |
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| Sumario: | Purpose This study aimed to apply MR elastography (MRE) to achieve in vivo evaluation of the
elastic properties of thigh muscles and validate the feasibility of quantifying the elasticity of
normal thigh muscles using MRE.
Materials and Methods This prospective study included 10 volunteer subjects [mean age, 32.5
years, (range, 23–45 years)] who reported normal activities of daily living and underwent both
T2-weighted axial images and MRE of thigh muscles on the same day. A sequence with a motion-
encoding gradient was used in the MRE to map the propagating shear waves in the muscle.
Elastic properties were quantified as the shear modulus of the following four thigh muscles
at rest; the vastus medialis, vastus lateralis, adductor magnus, and biceps femoris.
Results The mean shear modulus was 0.98 ± 0.32 kPa and 1.00 ± 0.33 kPa for the vastus medialis,
1.10 ± 0.46 kPa and 1.07 ± 0.43 kPa for the vastus lateralis, 0.91 ± 0.41 kPa and 0.93 ±
0.47 kPa for the adductor magnus, and 0.99 ± 0.37 kPa and 0.94 ± 0.32 kPa for the biceps femoris,
with reader 1 and 2, respectively. No significant difference was observed in the shear modulus
based on sex (p < 0.05). Aging consistently showed a statistically significant negative correlation
(p < 0.05) with the shear modulus of the thigh muscles, except for the vastus medialis (p =
0.194 for reader 1 and p = 0.355 for reader 2).
Conclusion MRE is a quantitative technique used to measure the elastic properties of individual
muscles with excellent inter-observer agreement. Age was consistently significantly negatively
correlated with the shear stiffness of muscles, except for the vastus medialis. |
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