A computational study for investigating acoustic streaming and tissue heating during high intensity focused ultrasound through blood vessel with an obstacle

2017 ◽  
Author(s):  
Salma Parvin ◽  
Aysha Sultana
Keyword(s):  
Blood Vessel ◽  
High Intensity ◽  
Focused Ultrasound ◽  
Computational Study ◽  
Acoustic Streaming ◽  
High Intensity Focused Ultrasound ◽  
Tissue Heating

Investigation Into the Acoustic Streaming and Convective Cooling Phenomena During a High-Intensity Focused Ultrasound Thermal Ablation

2011 ◽  
Author(s):  
Maxim A. Solovchuk ◽  
Tony W. H. Sheu ◽  
Marc Thiriet
Keyword(s):  
Blood Vessel ◽  
High Intensity ◽  
Thermal Ablation ◽  
Focused Ultrasound ◽  
Acoustic Streaming ◽  
Flow Distribution ◽  
Tissue Perfusion ◽  
High Intensity Focused Ultrasound ◽  
Hepatic Tissue ◽  
Convective Cooling

The present study is aimed at predicting liver tumor temperature increase during a high-intensity focused ultrasound (HIFU) thermal ablation using the proposed acoustics-heat-fluid coupling model. The linear Westervelt equation is adopted for modeling the incident finite-amplitude wave propagation. The nonlinear hemodynamic equations are also taken into account in the simulation domain that contains a hepatic tissue domain, where homogenization dominates perfusion, and a vascular domain, where blood convective cooling may be essential in determining the success of HIFU. We also consider the energy equation for the modeling thermal conduction heat transfer. Two heat sinks are dealt with to account for tissue perfusion and forced convection-induced cooling. The effect of acoustic streaming is also included in the current HIFU simulation study. Convective cooling in large blood vessel and acoustic streaming were shown to change the temperature near blood vessel. It was shown that the acoustic streaming effect can change the blood flow distribution in hepatic arterial branches and leads to mass flux redistribution. The effect of acoustic streaming can be used to control blood drug delivery. In the current work the realistic geometry for the blood vessel and liver was reconstructed using the MRI images. The presented results may be further used to construct a surgical planning platform for the non-invasive HIFU (High-Intensity Focal Ultrasound) tumor ablating (or cauterizing) therapy in real liver geometry on the basis of the MRI image.

Multiphysics Modeling of Liver Tumor Ablation by High Intensity Focused Ultrasound

2015 ◽  
Vol 18 (4) ◽  
pp. 1050-1071 ◽  
Author(s):  
Maxim Solovchuk ◽  
Tony Wen-Hann Sheu ◽  
Marc Thiriet
Keyword(s):  
Blood Vessel ◽  
Treatment Planning ◽  
High Intensity ◽  
Focused Ultrasound ◽  
Treatment Time ◽  
Acoustic Streaming ◽  
Tumor Ablation ◽  
High Intensity Focused Ultrasound ◽  
Nonlinear Propagation ◽  
Physical Fields

AbstractHigh intensity focused ultrasound is a rapidly developing technology for the ablation of tumors. Liver cancer is one of the most common malignancies worldwide. Since liver has a large number of blood vessels, blood flow cooling can reduce the necrosed volume and may cause regeneration of the tumor to occur. All cancer cells should be ablated without damaging of the critical tissues. Today, treatment planning tools consider liver as a homogeneous organ. This paper is a step towards the development of surgical planning platform for a non-invasive HIFU tumor ablative therapy in a real liver geometry based on CT/MRI image. This task requires coupling of different physical fields: acoustic, thermal and hydrodynamic. These physical fields can influence each other. In this paper we illustrate how a computational model can be used to improve the treatment efficiency. In large blood vessel both convective cooling and acoustic streaming can change the temperature considerably near blood vessel. The whole tumor ablation took only 30 seconds in the considered simulation case, which is very small comparing with the current treatment time of several hours. Through this study we are convinced that high ultrasound power and nonlinear propagation effects with appropriate treatment planning can sufficiently reduce the treatment time.

scholarly journals The role of acoustic nonlinearity in tissue heating behind a rib cage using a high-intensity focused ultrasound phased array

2013 ◽  
Vol 58 (8) ◽  
pp. 2537-2559 ◽  
Author(s):  
Petr V Yuldashev ◽  
Svetlana M Shmeleva ◽  
Sergey A Ilyin ◽  
Oleg A Sapozhnikov ◽  
Leonid R Gavrilov ◽  
...  
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
Phased Array ◽  
High Intensity Focused Ultrasound ◽  
Rib Cage ◽  
Acoustic Nonlinearity ◽  
Tissue Heating

High Intensity Focused Ultrasound (HIFU) Transducer Characterization Using Acoustic Streaming

2007 ◽  
Author(s):  
Prasanna Hariharan ◽  
Ronald A. Robinson ◽  
Matthew R. Myers ◽  
Rupak K. Banerjee
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
Optical Measurement ◽  
Measurement Techniques ◽  
Acoustic Streaming ◽  
Acoustic Power ◽  
High Intensity Focused Ultrasound ◽  
Medical Ultrasound ◽  
Intensity Field ◽  
Streaming Velocity

A new, non-perturbing optical measurement technique was developed to characterize medical ultrasound fields generated by High Intensity Focused Ultrasound (HIFU) transducers using a phenomenon called ‘acoustic streaming’. The acoustic streaming velocity generated by HIFU transducers was measured experimentally using Digital Particle Image Velocimetry (DPIV). The streaming velocity was then calculated numerically using the finite-element method. An optimization algorithm was developed to back-calculate acoustic power and intensity field by minimizing the difference between experimental and numerical streaming velocities. The intensity field and acoustic power calculated using this approach was validated with standard measurement techniques. Results showed that the inverse method was able to predict acoustic power and intensity fields within 10% of the actual value measured using standard techniques, at the low powers where standard methods can be safely applied. This technique is also potentially useful for evaluating medical ultrasound transducers at the higher power levels used in clinical practice.

Numerical simulations of tissue heating created by high‐intensity focused ultrasound

1998 ◽  
Vol 103 (5) ◽  
pp. 2867-2867 ◽  
Author(s):  
Francesco P. Curra ◽  
Peter Kaczkowski ◽  
Pierre D. Mourad ◽  
Lawrence A. Crum ◽  
Vera A. Khokhlova
Keyword(s):  
Numerical Simulations ◽  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Tissue Heating

scholarly journals Nanoparticle-Mediated Acoustic Cavitation Enables High Intensity Focused Ultrasound Ablation Without Tissue Heating

2018 ◽  
Vol 10 (43) ◽  
pp. 36786-36795 ◽  
Author(s):  
Adem Yildirim ◽  
Dennis Shi ◽  
Shambojit Roy ◽  
Nicholas T. Blum ◽  
Rajarshi Chattaraj ◽  
...  
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
Acoustic Cavitation ◽  
High Intensity Focused Ultrasound ◽  
Tissue Heating ◽  
Ultrasound Ablation ◽  
Focused Ultrasound Ablation

scholarly journals HIFU for Bone Metastases and other Musculoskeletal Applications

2018 ◽  
Vol 35 (04) ◽  
pp. 261-267 ◽  
Author(s):  
Michele Anzidei ◽  
Alberto Bazzocchi ◽  
Cesare Gagliardo ◽  
Carlo Catalano ◽  
Alessandro Napoli ◽  
...  
Keyword(s):  
Bone Metastases ◽  
High Intensity ◽  
Focused Ultrasound ◽  
Facet Joint ◽  
Local Tumor Control ◽  
High Intensity Focused Ultrasound ◽  
Low Flow ◽  
Tumor Control ◽  
Ultrasound Waves ◽  
Tissue Heating

AbstractHigh-intensity focused ultrasound (HIFU) is a totally noninvasive procedure that has shown promising results in the management of numerous malignant and nonmalignant conditions. Under magnetic resonance or ultrasound guidance, high-intensity ultrasound waves are focused on a small, well-defined target region, inducing biologic tissue heating and coagulative necrosis, thus resulting in a precise and localized ablation. This treatment has shown both great safety and efficacy profiles, and may offer a multimodal approach to different diseases, providing pain palliation, potential local tumor control, and, in some cases, remineralization of trabecular bone. In musculoskeletal field, HIFU received FDA approval for treating bone metastasis, but its application has also been extended to other conditions, such as osteoid osteoma, desmoid tumor, low-flow vascular malformation, and facet joint osteoarthritis. This article illustrates the basic principles of HIFU and its main effects on biologic tissues with particular attention on bone, provides a step-by-step description of the HIFU procedure, and discusses the commonly treated conditions, in particular bone metastases.

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