Time-course of physical properties of the psoas major muscle after exercise as assessed by MR elastography

Habe, Tetsushi; Numano, Tomokazu; Nishijo, Hisao; Iwama, Yudai; Takamoto, Kouichi; Ito, Daiki; Mizuhara, Kazuyuki; Osada, Kaito; Kanai, Midori

doi:10.1016/j.mri.2022.06.011

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Patients with LDH, especially with LBP symptoms, should be treated as soon as possible by appropriate treatment methods to avoid the atrophy of PM. Compared to before exercise, Tetsushi et al ( 19 ) reported that PM may increase significantly in a short period of time after exercise. A study by Tawara et al ( 20 ).…”

Section: Discussionmentioning

confidence: 99%

Analysis of CT imaging changes of psoas major muscles in patients with lumbar disc herniation mainly based on low back pain and lower limb pain

et al. 2023

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BackgroundThe study aimed to compare the area changes of CT (computed tomograghy) imaging of psoas major muscle (PM) in patients with lumbar disc herniation (LDH) mainly based on low back pain (LBP) and lower limb pain (LLP), and to analyze the correlation among them.MethodsWe retrospectively analyzed the lumbar CT imaging data of 120 patients with LDH and 60 healthy control people in our hospital from July 2017 to August 2019. They were divided into LBP group (60 cases), LLP group (60 cases) and healthy controls group (60 cases). According to the pain duration and pain degree, LBP group and LLP group were divided into three subgroups respectively. The maximum cross-sectional area (CSA) of PM and the CSA of L5 vertebral body were calculated by Image J software, and the ratio of them was the maximum CSA index of PM. The maximum CSA indices of PM among three groups and three subgroups were compared, respectively.ResultsThe baseline data among the three groups weren’t significantly different (P > 0.05), yet the maximum CSA index of PM did (P < 0.05). In the LBP group, the maximum CSA indices of PM among the three subgroups (short, medium and long) according to the pain duration were significantly different (P < 0.05), and those among the three subgroups (light, medium and heavy) according to pain degree did (P < 0.05). In the LLP group, the maximum CSA indices of PM among the three subgroups (short, medium and long) were compared, but there was not statistical difference among the three subgroups (P > 0.05). No statistical difference in terms of the maximum CSA indices of PM among the three subgroups (light, medium and heavy) was observed (P > 0.05).ConclusionThe atrophy and thinning of PM may be related to LDH. The correlation between the atrophy of PM and LBP was greater than that of LLP. The atrophy of PM in LDH patients with LBP increased with the prolongation of pain duration and aggravation of pain degree.

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Section: Discussionmentioning

confidence: 99%

Analysis of CT imaging changes of psoas major muscles in patients with lumbar disc herniation mainly based on low back pain and lower limb pain

et al. 2023

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“…As a noninvasive tool for measuring tissue mechanical properties, MRE has an expanding role in clinical applications, from assessing liver fibrosis [3][4][5] to applications in heart, 6,7 brain, [8][9][10][11][12][13][14][15][16] and other organs. 1,[17][18][19][20][21][22][23][24] The mechanical properties of biological tissue can be frequency-dependent, and there is currently an increasing interest in evaluating such frequency dependency with multifrequency MRE. [25][26][27][28][29][30][31][32] In most of the previous studies, MRE images were acquired at each frequency monochromatically.…”

Section: Introductionmentioning

confidence: 99%

“…Images are acquired representing different phases of the propagating wavefield. As a noninvasive tool for measuring tissue mechanical properties, MRE has an expanding role in clinical applications, from assessing liver fibrosis 3–5 to applications in heart, 6,7 brain, 8–16 and other organs 1,17–24 …”

Section: Introductionmentioning

confidence: 99%

Wavelet MRE: Imaging propagating broadband acoustic waves with wavelet‐based motion‐encoding gradients

Le,

Chen,

Rossman

et al. 2023

Magnetic Resonance in Med

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PurposeTo demonstrate a novel MR elastography (MRE) technique, termed here wavelet MRE. With this technique, broadband motion sensitivity is achievable. Moreover, the true tissue displacement can be reconstructed with a simple inverse transform.MethodsA wavelet MRE sequence was developed with motion‐encoding gradients based on Haar wavelets. From the phase images' displacement was estimated using an inverse transform. Simulations were performed using a frequency sweep and a transient as ground‐truth motions. A PVC phantom was scanned using wavelet MRE and standard MRE with both transient (one and 10 cycles of 90‐Hz motion) and steady‐state dual‐frequency motion (30 and 60 Hz) for comparison. The technique was tested in a human brain, and motion trajectories were estimated for each voxel.ResultsIn simulation, the displacement information estimated from wavelet MRE closely matched the true motion. In the phantom test, the MRE phase data generated from the displacement information derived from wavelet MRE agreed well with standard MRE data. Testing of wavelet MRE to assess transient motion waveforms in the brain was successful, and the tissue motion observed was consistent with a previous study.ConclusionThe uniform and broadband frequency response of wavelet MRE makes it a promising method for imaging transient, multifrequency motion, or motion with unknown frequency content. One potential application is measuring the response of brain tissue undergoing low‐amplitude, transient vibrations as a model for the study of traumatic brain injury.

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Test–retest reliability and follow‐up of muscle magnetic resonance elastography in adults with and without muscle diseases

De Wel,

Huysmans,

Peeters

et al. 2024

J cachexia sarcopenia muscle

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BackgroundWe investigated the potential of magnetic resonance elastography (MRE) stiffness measurements in skeletal muscles as an outcome measure, by determining its test–retest reliability, as well as its sensitivity to change in a longitudinal follow‐up study.MethodsWe assessed test–retest reliability of muscle MRE in 20 subjects with (n = 5) and without (n = 15) muscle diseases and compared this to Dixon proton density fat fraction (PDFF) and volume measurements. Next, we measured MRE muscle stiffness in 21 adults with Becker muscular dystrophy (BMD) and 21 age‐matched healthy controls at baseline, and after 9 and 18 months. We compared two different methods of analysing MRE data in this study: ‘Method A’ used the stiffness maps generated by the Philips MRE software, and ‘Method B’ applied a custom‐made procedure based on wavelength measurements on the MRE images.ResultsIntraclass correlation coefficients (ICC) of muscle stiffness ranged from good (0.83 for left vastus medialis, P < 0.001) to poor (0.19 for right rectus femoris, P = 0.212) for the examined thigh muscles with Method A, but we did not find a significant test–retest reliability with Method B (P > 0.050 for all). The ICC of muscle PDFF and volume measurements was excellent (>0.90; P < 0.001) for all muscles. At baseline, the average stiffness of all thigh muscles was significantly lower in adults with BMD than in controls for both Method A (−0.2 kPa, P = 0.025) and Method B (−0.6 kPa, P < 0.001). Regardless of which method was used, there was no significant difference in the evolution of muscle stiffness in patients and controls over 18 months.ConclusionsTest–retest reliability of muscle MRE using a simple 2D technique was suboptimal, and did not reliably measure muscle stiffness changes in adults with BMD as compared with controls over 18 months. While the results provide motivation for testing more advanced 3D MRE methods, we conclude that the simple 2D MRE implementation used in this study is not suitable as an outcome measure for characterizing thigh muscle in clinical trials.

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Time-course of physical properties of the psoas major muscle after exercise as assessed by MR elastography

Cited by 5 publications

References 24 publications

Analysis of CT imaging changes of psoas major muscles in patients with lumbar disc herniation mainly based on low back pain and lower limb pain

Analysis of CT imaging changes of psoas major muscles in patients with lumbar disc herniation mainly based on low back pain and lower limb pain

Wavelet MRE: Imaging propagating broadband acoustic waves with wavelet‐based motion‐encoding gradients

Test–retest reliability and follow‐up of muscle magnetic resonance elastography in adults with and without muscle diseases

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