A new technique for MR elastography of the supraspinatus muscle: A gradient-echo type multi-echo sequence

Ito, Daiki; Numano, Tomokazu; Mizuhara, Kazuyuki; Takamoto, Kouichi; Onishi, Tatsuya; Nishijo, Hisao

doi:10.1016/j.mri.2016.06.003

Cited by 21 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, a new modality called MR elastography was described that could be useful for the diagnosis and examination of the effect of treatment, such as a tear of the supraspinatus muscle (19).…”

Section: Discussionmentioning

confidence: 99%

A novel measurement to evaluate supraspinatus tendinopathies with strain elastography

et al. 2020

View full text Add to dashboard Cite

Background In addition to the traditional strain ratio (STR), a novel measurement termed hard percent of the whole tendon, provided by the device’s software and resembling shear-wave elastography, was included in the study. Purpose To evaluate the correlation between magnetic resonance imaging (MRI) and strain elastography findings in cases with rotator cuff tendinopathy, including tears. Material and Methods As a prospective study, cases suggestive of rotator cuff tendinopathy were included. After MRI evaluation by two observers, grading of the elastography examination was performed by a third radiologist. For the first measurement, the region of interest (ROI) was chosen from the gray-scale evaluation corresponding to the area showing a MRI pathological signal. Stiffness was assessed with the STR. For the second measurement, the whole visible tendon was measured as the ROI. The hard percent (unaffected areas as a percent) was measured. Correlation coefficients between MRI grade and the two strain value measurements were calculated. Results There were 93 cases (31 men, 62 women) with 112 involved tendons. The correlation coefficient between MRI grade and age was calculated as 0.56, between MRI grade and STR it was –0.51, and with the novel measurement the correlation coefficient was –0.53. Conclusion This study showed a good association of findings of tendon stiffness with those of tendinopathy on MRI. Using the hard ratio as a novel measurement, its correlation with MRI grade was as reliable as the STR. We also experienced that the benefit of elastography is a challenging issue for defining small ruptures.

show abstract

Section: Discussionmentioning

confidence: 99%

A novel measurement to evaluate supraspinatus tendinopathies with strain elastography

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Historically, ultrasonography has been used to measure muscle architectural parameters such as muscle thickness, [23] muscle pennation angle, [24] muscle fiber length, and muscle cross-sectional area as indirect expressions of muscle activity [25, 26]. Indirect estimates of muscle tissue properties can be made using magnetic resonance elastrography (MRE) [27, 28] and shear wave elastrography (SWE) [6]. MRE is not able to specify muscle tension, however, and the modality is hampered by being physically inappropriate.…”

Section: Discussionmentioning

confidence: 99%

Musculoskeletal application and validation of speckle-tracking ultrasonography

Frich

Lambertsen

Hjarbæk

et al. 2019

BMC Musculoskelet Disord

View full text Add to dashboard Cite

Background Diseased, injured, or dysfunctional skeletal muscles may demonstrate abnormal function and contractility. Currently, only few in vivo imaging techniques are able to characterize the contractile properties of muscle tissue. This study aimed to test the hypothesis that muscle strain can be tracked in two upper extremity skeletal muscles by speckle-tracking ultrasonography (STU) and correlates with isometric muscle contractions. Methods A convenience sample of 10 healthy, adult volunteers with normal shoulder function were tested. The 5 women and 5 men had a mean age of 45 years (range: 39–59 years) and BMI < 30. STU was applied to the supraspinatus (SS) and biceps brachii (BB) muscles using a M11 L-MHz linear transducer (frequency 8–15 MHz) hooked to a Vivid E 9TM ultrasound machine. Strain validation was performed by correlating peak strain against standardized sub-maximal, isometric load conditions of the two muscles (20–80% of maximal voluntary contraction) using a custom-built muscle dynamometer based on strain-gauge technique. Data were analyzed offline using the EchoPac speckle-tracking software and were blinded to the examiner. Results Intramuscular strain measured by STU in the SS and BB muscles showed moderate to strong correlations with external muscle load (SS: r = − 0.76, p < 0.0001 and BB: r = − 0.60, p < 0.0001). We found strain to vary from approximately 10–20% during increasing submaximal, isometric conditions. Conclusions We demonstrate that STU can be applied on healthy skeletal musculature (SS and BB muscles). The observed correlations between strain and isometric contractions suggest a valid technique. However, the concept of measuring muscle strain non-invasively needs further investigation for validity, accuracy, responsiveness, and reliability before its therapeutic and research potential can be realized.

show abstract

“…Wave profiles were extracted from nine parallel segments positioned manually on sagittal phase images (step 3) and along the direction of wave propagation (32,34,36,37,(54)(55)(56). Bilinear interpolation was applied to these profiles before further analysis (Fig.…”

Section: Data Processingmentioning

confidence: 99%

Fast acquisition of propagating waves in humans with low-field MRI: Toward accessible MR elastography

2022

View full text Add to dashboard Cite

Most commonly used at clinical magnetic fields (1.5 to 3 T), magnetic resonance elastography (MRE) captures mechanical wave propagation to reconstruct the mechanical properties of soft tissue with MRI. However, in terms of noninvasively assessing disease progression in a broad range of organs (e.g., liver, breast, skeletal muscle, and brain), its accessibility is limited and its robustness is challenged when magnetic susceptibility differences are encountered. Low-field MRE offers an opportunity to overcome these issues, and yet it has never been demonstrated in vivo in humans with magnetic fields <1.5 T mainly because of the long acquisition times required to achieve a sufficient signal-to-noise ratio. Here, we describe a method to accelerate 3D motion-sensitized MR scans at 0.1 T using only 10% k -space sampling combined with a high-performance detector and an efficient encoding acquisition strategy. Its application is demonstrated in vivo in the human forearm for a single motion-encoding direction in less than 1 min.

show abstract

A new technique for MR elastography of the supraspinatus muscle: A gradient-echo type multi-echo sequence

Cited by 21 publications

References 23 publications

A novel measurement to evaluate supraspinatus tendinopathies with strain elastography

A novel measurement to evaluate supraspinatus tendinopathies with strain elastography

Musculoskeletal application and validation of speckle-tracking ultrasonography

Fast acquisition of propagating waves in humans with low-field MRI: Toward accessible MR elastography

Contact Info

Product

Resources

About