Propagation of two longitudinal waves in a cancellous bone with the closed pore boundary

Mizuno, Katsunori; Nagatani, Yoshiki; Yamashita, K.; Matsukawa, Mami

doi:10.1121/1.3607196

Cited by 28 publications

(18 citation statements)

References 18 publications

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“…Among them, as we mentioned earlier, the propagation of two longitudinal waves (the so-called fast and slow waves) when a single ultrasound pulse is transmitted through trabecular bone. This observation has been reported in vitro several times (Fellah et al, 2004;Hosokawa and Otani, 1997;Mizuno et al, 2011), and once in vivo (Yamamoto et al, 2009).…”

Section: Introductionmentioning

confidence: 51%

Simulations of ultrasound propagation in random arrangements of elliptic scatterers: Occurrence of two longitudinal waves

Mézière

Müller

Dobigny

et al. 2013

The Journal of the Acoustical Society of America

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Ultrasound propagation in clusters of elliptic (two-dimensional) or ellipsoidal (three-dimensional) scatterers randomly distributed in a fluid is investigated numerically. The essential motivation for the present work is to gain a better understanding of ultrasound propagation in trabecular bone. Bone microstructure exhibits structural anisotropy and multiple wave scattering. Some phenomena remain partially unexplained, such as the propagation of two longitudinal waves. The objective of this study was to shed more light on the occurrence of these two waves, using finite-difference simulations on a model medium simpler than bone. Slabs of anisotropic, scattering media were randomly generated. The coherent wave was obtained through spatial and ensemble-averaging of the transmitted wavefields. When varying relevant medium parameters, four of them appeared to play a significant role for the observation of two waves: (i) the solid fraction, (ii) the direction of propagation relatively to the scatterers orientation, (iii) the ability of scatterers to support shear waves, and (iv) a continuity of the solid matrix along the propagation. These observations are consistent with the hypothesis that fast waves are guided by the locally plate/bar-like solid matrix. If confirmed, this interpretation could significantly help developing approaches for a better understanding of trabecular bone micro-architecture using ultrasound.

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Section: Introductionmentioning

confidence: 51%

Simulations of ultrasound propagation in random arrangements of elliptic scatterers: Occurrence of two longitudinal waves

Mézière

Müller

Dobigny

et al. 2013

The Journal of the Acoustical Society of America

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“…The confirmation of the two-wave phenomenon under the condition in which cancellous bone is sealed with cortical bone, as reported by Mizuno et al (Mizuno et al, 2011a;Mizuno et al, 2011b) and Hosokawa and Nagatani (2012), encouraged us to apply this interesting phenomenon to a practical application. However, because the two waves sometimes overlap each other, depending on the conditions of the specimen, it can be difficult to distinguish their distinct features.…”

Section: Introductionmentioning

confidence: 71%

Multichannel instantaneous frequency analysis of ultrasound propagating in cancellous bone

Nagatani

Tachibana

2014

The Journal of the Acoustical Society of America

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An ultrasonic pulse propagating in cancellous bone can be separated into two waves depending on the condition of the specimen. These two waves, which are called the fast wave and the slow wave, provide important information for the diagnosis of osteoporosis. The present study proposes to utilize a signal processing method that extracts the instantaneous frequency (IF) of waveforms from multiple spectral channels. The instantaneous frequency was expected to be able to show detailed time-frequency properties of ultrasonic waves being transmitted through cancellous bone. The employed method, termed the multichannel instantaneous frequency (MCIF) method, showed robustness against background noise as compared to the IF that was directly derived from the original waveform. The extracted IF revealed that the frequency of the fast wave was affected by both the propagation distance within the specimen and the bone density, independently. On the other hand, the alternation of the center frequency of the originally transmitted wave did not produce proportional changes in the extracted IF values of the fast waves, suggesting that the fast wave IF mainly reflected the thickness of the specimens. These findings may provide the possibility of obtaining a more precise diagnosis of osteoporosis.

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“…The dense outer cortex might influence the backscatter measurement of cancellous bone in vivo (Hoffmeister et al 2011;Liu et al 2014b;Mizuno et al 2011;Nagatani et al 2014). Hoffmeister et al (2011) found that the bone cortex at the femoral head decreased AIB by approximately 6 dB on average, but did not affect the correlation between AIB and BMD of the specimens.…”

Section: Discussionmentioning

confidence: 99%

Signal of Interest Selection Standard for Ultrasonic Backscatter in Cancellous Bone Evaluation

Liu

Tang

et al. 2015

Ultrasound in Medicine & Biology

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Propagation of two longitudinal waves in a cancellous bone with the closed pore boundary

Cited by 28 publications

References 18 publications

Simulations of ultrasound propagation in random arrangements of elliptic scatterers: Occurrence of two longitudinal waves

Simulations of ultrasound propagation in random arrangements of elliptic scatterers: Occurrence of two longitudinal waves

Multichannel instantaneous frequency analysis of ultrasound propagating in cancellous bone

Signal of Interest Selection Standard for Ultrasonic Backscatter in Cancellous Bone Evaluation

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