Measurement of muscle activity with magnetic resonance elastography

Heers, G.; Jenkyn, Thomas R.; Dresner, M. Alex; Klein, Marc; Basford, Jeffrey R.; Kaufman, Kenton R.; Ehman, Richard L.; An, Kai Nan

doi:10.1016/s0268-0033(03)00070-6

Cited by 79 publications

(91 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using group velocity inversion, it is possible to adapt the spatial sector of wave inversion to a boundary-free ROI. This can be particularly important for evaluating MRE experiments of thin muscle layers or less separated muscle groups (21)(22)(23)36). As Fig.…”

Section: Discussionmentioning

confidence: 99%

Shear wave group velocity inversion in MR elastography of human skeletal muscle

Papazoglou

Rump

Braun

et al. 2006

Magnetic Resonance in Med

108

View full text Add to dashboard Cite

In vivo quantification of the anisotropic shear elasticity of soft tissue is an appealing objective of elastography techniques because elastic anisotropy can potentially provide specific information about structural alterations in diseased tissue. Here a method is introduced and applied to MR elastography (MRE) of skeletal muscle. With this method one can elucidate anisotropy by means of two shear moduli (one parallel and one perpendicular to the muscle fiber direction). The technique is based on group velocity inversion applied to bulk shear waves, which is achieved by an automatic analysis of wave-phase gradients on a spatiotemporal scale. The shear moduli are then accessed by analyzing the directional dependence of the shear wave speed using analytic expressions of group velocities in k-space, which are numerically mapped to real space. The method is demonstrated by MRE experiments on the biceps muscle of five volunteers, resulting in 5.5 ؎ 0.9 kPa and 29.3 ؎ 6.2 kPa (P < 0.05) for the medians of the perpendicular and parallel shear moduli, respectively. The proposed technique combines fast steadystate free precession (SSFP) MRE experiments and fully automated processing of anisotropic wave data, and is thus an interesting MRI modality for aiding clinical diagnosis. Magn Reson Med 56:489 -497, 2006.

show abstract

Section: Discussionmentioning

confidence: 99%

Shear wave group velocity inversion in MR elastography of human skeletal muscle

Papazoglou

Rump

Braun

et al. 2006

Magnetic Resonance in Med

108

View full text Add to dashboard Cite

show abstract

“…Heers et al (185) have measured the wavelengths of mechanically generated shear waves in the tibialis anterior, gastrocnemius and soleus muscles of healthy volunteers as the subjects resisted ankle plantar-flexing and dorsi-flexing moments. The MRE elastography wavelengths were compared with electromyography as a measure of muscle activity.…”

Section: Mri Elastography and The Mechanical Properties Of Musclementioning

confidence: 99%

Dynamic MRS and MRI of skeletal muscle function and biomechanics

et al. 2006

View full text Add to dashboard Cite

MR is a powerful technique for studying the biomechanical and functional properties of skeletal muscle in vivo in health and disease. This review focuses on 31 P, 1 H and 13 C MR spectroscopy for assessment of the dynamics of muscle metabolism and on dynamic 1 H MRI methods for non-invasive measurement of the biomechanical and functional properties of skeletal muscle. The information thus obtained ranges from the microscopic level of the metabolism of the myocyte to the macroscopic level of the contractile function of muscle complexes. The MR technology presented plays a vital role in achieving a better understanding of many basic aspects of muscle function, including the regulation of mitochondrial activity and the intricate interplay between muscle fiber organization and contractile function. In addition, these tools are increasingly being employed to establish novel diagnostic procedures as well as to monitor the effects of therapeutic and lifestyle interventions for muscle disorders that have an increasing impact in modern society.

show abstract

“…Initial efforts were devoted to the application of the approach to soft tissues such as the breast (Muthupillai, et al;1995, Plewes, et al;2000, Sinkus et al;McKnight et al;. More recent work has begun to assess its utility in the study of skeletal muscles in the upper and lower extremities (Heers, et al;2003, Basford, et al;2002, Sack, et al;2002, Uffmann, et al;2004, Bensamoun, et al;2005, Bensamoun, et al;2007).…”

Section: Introductionmentioning

confidence: 99%

Ability of magnetic resonance elastography to assess taut bands

Chen

Basford

2008

Clinical Biomechanics

Self Cite

111

View full text Add to dashboard Cite

Background-Myofascial taut bands are central to diagnosis of myofascial pain. Despite their importance, we still lack either a laboratory test or imaging technique capable of objectively confirming either their nature or location. This study explores the ability of magnetic resonance elastography to localize and investigate the mechanical properties of myofascial taut bands on the basis of their effects on shear wave propagation.

show abstract

Measurement of muscle activity with magnetic resonance elastography

Cited by 79 publications

References 13 publications

Shear wave group velocity inversion in MR elastography of human skeletal muscle

Shear wave group velocity inversion in MR elastography of human skeletal muscle

Dynamic MRS and MRI of skeletal muscle function and biomechanics

Ability of magnetic resonance elastography to assess taut bands

Contact Info

Product

Resources

About