Applicability of Finite-Difference Time-Domain Method to Simulation of Wave Propagation in Cancellous Bone

Nagatani, Yoshiki; Imaizumi, Hirotaka; Fukuda, Takashi; Matsukawa, Mami; Watanabe, Yoshiaki; Otani, Takahiko

doi:10.1143/jjap.45.7186

Cited by 69 publications

(54 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Hosokawa [29] and Nagatani et al [30] have used FDTD methods to investigate the sensitivity of the fast and slow modes to various mass and structural parameters of trabecular bone. These studies aim to use additional information contained in the received signal to estimate bone strength, and ultimately fracture risk.…”

Section: Ultrasound Computer Simulation Examplesmentioning

confidence: 99%

Ultrasound simulation in bone

Kaufman

Luo

Siffert

2008

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

101

View full text Add to dashboard Cite

The manner in which ultrasound interacts with bone is of key interest in therapy and diagnosis alike. These may include applications directly to bone, as, for example, in treatment to accelerate the healing of bone fractures and in assessment of bone density in osteoporosis, or indirectly in diagnostic imaging of soft tissue with interest in assessing exposure levels to nearby bone. Because of the lack of analytic solutions to virtually every "practical problem" encountered clinically, ultrasound simulation has become a widely used technique for evaluating ultrasound interactions in bone. This paper provides an overview of the use of ultrasound simulation in bone. A brief description of the mathematical model used to characterize ultrasound propagation in bone is first provided. A number of simulation examples are then presented that explain how simulation may be utilized in a variety of practical configurations. The focus of this paper in terms of examples presented is on diagnostic applications in bone, and, in particular, for assessment of osteoporosis. However, the use of simulation in other areas of interest can easily be extrapolated from the examples presented. In conclusion, this paper describes the use of ultrasound simulation in bone and demonstrates the power of computational methods for ultrasound research in general and tissue and bone applications in particular.

show abstract

Section: Ultrasound Computer Simulation Examplesmentioning

confidence: 99%

Ultrasound simulation in bone

Kaufman

Luo

Siffert

2008

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

101

View full text Add to dashboard Cite

show abstract

“…Hosokawa and Otani (1997) discovered one significant behavior of this propagation: An ultrasonic pulse propagated in trabecular bone separates into two waves. These two waves, called the fast wave and the slow wave, strongly reflect the bone volume fraction (spatial density of solid part inside bone) and structure, the alignment of trabeculae, and the elastic modulus (for example, Otani, 1997, 1998;Cardoso et al, 2003;Cardoso et al, 2008;Nagatani et al, 2006;Hosokawa, 2006aHosokawa, , 2007Hosokawa, , 2008bHosokawa, , 2009aMizuno et al, 2008;Mizuno et al, 2009;Mizuno et al, 2010). Hosokawa and Otani also reported that the attenuation of the fast wave increased in the megahertz range (Hosokawa and Otani, 1997;Otani, 2005).…”

Section: Introductionmentioning

confidence: 99%

Multichannel instantaneous frequency analysis of ultrasound propagating in cancellous bone

Nagatani

Tachibana

2014

The Journal of the Acoustical Society of America

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…An increasing number of studies describing the numerical simulation of QUS experiments have been published in the past decade and several groups worldwide have developed dedicated FDTD codes [31,32,33,34]. In this paper we have shown that the simulation of the measurement at the femoral neck is not practicable with FDTD alone.…”

Section: Discussionmentioning

confidence: 94%

A hybrid FDTD-Rayleigh integral computational method for the simulation of the ultrasound measurement of proximal femur

Cassereau¹,

Nauleau²,

Bendjoudi³

et al. 2014

Ultrasonics

View full text Add to dashboard Cite

International audienceThe development of novel quantitative ultrasound (QUS) techniques to measure the hip is critically dependent on the possibility to simulate the ultrasound propagation. One specificity of hip QUS is that ultrasounds propagate through a large thickness of soft tissue, which can be modeled by a homogeneous fluid in a first approach. Finite difference time domain (FDTD) algorithms have been widely used to simulate QUS measurements but they are not adapted to simulate ultrasonic propagation over long distances in homogeneous media. In this paper, an hybrid numerical method is presented to simulate hip QUS measurements. A two-dimensional FDTD simulation in the vicinity of the bone is coupled to the semi-analytic calculation of the Rayleigh integral to compute the wave propagation between the probe and the bone. The method is used to simulate a setup dedicated to the measurement of circumferential guided waves in the cortical compartment of the femoral neck. The proposed approach is validated by comparison with a full FDTD simulation and with an experiment on a bone phantom. For a realistic QUS configuration, the computation time is estimated to be sixty times less with the hybrid method than with a full FDTD approach

show abstract

Applicability of Finite-Difference Time-Domain Method to Simulation of Wave Propagation in Cancellous Bone

Cited by 69 publications

References 13 publications

Ultrasound simulation in bone

Ultrasound simulation in bone

Multichannel instantaneous frequency analysis of ultrasound propagating in cancellous bone

A hybrid FDTD-Rayleigh integral computational method for the simulation of the ultrasound measurement of proximal femur

Contact Info

Product

Resources

About