Estimation of the Speed of Ultrasound Propagation in Biological Tissues: A Beam-Tracking Method

1986 ◽  
Vol 33 (4) ◽  
pp. 359-368 ◽  
Author(s):  
J. Ophir
Keyword(s):  
Biological Tissues ◽  
Tracking Method ◽  
Ultrasound Propagation ◽  
Speed Of Ultrasound ◽  
Beam Tracking

The circular electron–positron collider beam energy measurement with Compton scattering and beam tracking method

2020 ◽  
Vol 91 (3) ◽  
pp. 033109
Author(s):  
Guangyi Tang ◽  
Shanhong Chen ◽  
Yuan Chen ◽  
Zhe Duan ◽  
Manqi Ruan ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Beam Energy ◽  
Energy Measurement ◽  
Tracking Method ◽  
Electron Positron ◽  
Beam Tracking

Mathematical Simulation of Pressure Pulse Propagation in Biological Tissues

1993 ◽  
Vol 15 (1) ◽  
pp. 59-71 ◽  
Author(s):  
Victor N. Adrov ◽  
Victor V. chernomordik
Keyword(s):  
Experimental Data ◽  
Pulse Propagation ◽  
Pressure Pulse ◽  
Biological Tissues ◽  
Space Distribution ◽  
Pressure Amplitude ◽  
Computer Realization ◽  
Ultrasound Propagation ◽  
Digital Simulations ◽  
Time Form

The propagation of pressure pulses of arbitrary time form in inhomogeneous attenuating media with characteristics similar to real biological tissues is considered. A mathematical model using the quasi-optical approximation is developed to solve the wave equation. Such a model proves to be convenient for computer realization. A spectral analysis of known experimental data on frequency dependent backscatter is realized to separate coherent and incoherent components of backscatter from tissues and determine their parameters. The characteristics of the scattering are utilized for digital simulations of ultrasound propagation from an interrogated tissue volume. The results presented describe the expected space distribution of the pressure amplitude and phase near the transducer focus in the presence of an aberrating layer with parameters characteristic of abdominal imaging.

Time-Domain Simulation of Ultrasound Propagation With Fractional Laplacian

2016 ◽  
Author(s):  
Junjian Zhang ◽  
Guoyi Ke ◽  
Z. Charlie Zheng
Keyword(s):  
Fractional Derivative ◽  
Time Domain ◽  
Fractional Laplacian ◽  
Homogeneous Medium ◽  
Biological Tissues ◽  
Immersed Boundary ◽  
Derivative Operator ◽  
Ultrasound Propagation ◽  
Dispersion Effects ◽  
Absorption And Dispersion

The simulation is developed for the purpose of simulating ultrasound propagation through biological tissues. The simulation is based on the time-domain conservation laws with the governing equations for acoustic pressure and velocity, with frequency dependent absorption and dispersion effects. We use forward differencing for velocity and backward differencing for pressure on the non-fractional derivative operator terms in spatial discretization. The fractional Laplacian operators are treated as Riesz derivatives. The shifted standard Grunwald approximation method is used to solve fractional derivative operator terms. To accommodate complicated biological tissue geometries, an immersed boundary method is developed that enables a Cartesian computational grid mesh to be used. The results are compared with those for a non-absorption homogeneous medium to discuss absorption and dispersion effects of biological material.

Sign in / Sign up

Export Citation Format

Share Document