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Thursday, May 7, 2020 | History

2 edition of Physical mechanisms for biological effects of ultrasound found in the catalog.

Physical mechanisms for biological effects of ultrasound

Wesley Le Mars Nyborg

Physical mechanisms for biological effects of ultrasound

by Wesley Le Mars Nyborg

  • 330 Want to read
  • 23 Currently reading

Published by The Bureau in Rockville, Md .
Written in English

    Subjects:
  • Ultrasonics in medicine.,
  • Ultrasonics -- Physiological effect.,
  • Ultrasonics.,
  • Ultrasonics -- adverse effects.

  • Edition Notes

    Statementbased on a series of lectures delivered by Wesley L. Nyborg ; edited by Evelyn Byers Surles ; co-sponsored by School of Engineering Acoustics Program, The Catholic University of America and U.S. Department of Health, Education, and Welfare, Public Health Service, Food and Drug Administration, Bureau of Radiological Health.
    SeriesDHEW publication -- no. (FDA) 78-8062.
    ContributionsSurles, Evelyn Byers., United States. Bureau of Radiological Health. Division of Biological Effects., Catholic University of America. School of Engineering Acoustics Program.
    The Physical Object
    Paginationvii, 59 p. :
    Number of Pages59
    ID Numbers
    Open LibraryOL14174811M

    Through both thermal and nonthermal mechanisms, ultrasound can produce a variety of biological effects in tissues in vitro and in vivo. This chapter provides an overview of the fundamentals of key nonthermal mechanisms for the interaction of ultrasound with biological by: The response of biological tissue to ultrasound exposure can be quite variable and depends on the acoustic and biological properties as well as on the location and function of the exposed tissue. The consequences of interactions with ultrasonic energy depend on the susceptibility of the cells to damage and on their differentiation, or Cited by:

    The biological effects of ultrasound refer to the potential adverse effects the imaging modality has on human tissue. These are primarily via two main mechanisms: thermal and mechanical. Despite this, ultrasound has a remarkable record for patient safety with no significant adverse bioeffects reported in . An understanding of the bio-effects of sonography is important for clinicians and scientists working in the field because permanent damage to biological tissues can occur at high levels of exposure. Here the underlying principles of thermal mechanisms and the physical interactions of ultrasound with biological tissues are by:

    The sixth course of the School, entitled "Advances in Applications, Biological Effects, and Dosimetry of Ultrasound," provided an in-depth review of all facets of ultra­ sound interactions and their biological effects on living systems, allowing an assessment of the Cited by: Biological effects of stress waves Laser-induced mechanical effects in tissue have been the subject of extensive research, especially as these effects pertain to ophthalmology as in photodis ruption (e.g., Steinert and Puliafito ; Vogel et al. ; Zysset et al. ) or phacoemulsification (Zelman ), urology (e.g., Hofmann and Hartung Cited by:


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Physical mechanisms for biological effects of ultrasound by Wesley Le Mars Nyborg Download PDF EPUB FB2

Physical Mechanisms for Biological Effects of Ultrasound at Low-Intensity Levels. Abstract. Much of the recent increased interest in bioeffects of ultrasound stems from the astounding success of ultrasound in diagnostic by: 1.

Biological Effects of Ultrasound: Mechanisms and Clinical Implications (N C R P REPORT) by National Council on Radiation Protection and Measurements (Author) ISBN ISBN Why is ISBN important.

ISBN. This bar-code number lets you verify that you're getting exactly the right version or edition of a book. Physical mechanisms for biological effects of ultrasound: based on a series of lectures delivered Author: Wesley L Nyborg ; Evelyn Byers Surles ; United States.

Apfel, R. E., Technique for measuring the adiabatic compressibility, density and sound speed of submicroliter liquid samples, J. Am, – ().In this paper the author describes a method that he has suggested (private communication) might be applicable to biological by: 5.

The dominant physical mechanism for HIFU therapy is the conversion of acoustical energy into thermal energy to ablate biological tissues through thermal necrosis [8]. The thermal properties of. physical mechanisms of the therapeutic ef fect of ultrasound results of a 3D code to calculate heating near a blood vessel [ Curra et al., pp.

The primary physical mechanism in HIFU is the conversion of acoustic energy into heat, which is often enhanced by nonlinear acoustic propagation and nonlinear scattering from bubbles. Other mechanical effects from ultrasound appear to stimulate an immune response, and bubble dynamics play an important role in lithotripsy Cited by: Other potential mechanisms for biological effects of ultrasound include the direct action of the compressional, tensile, and shear stresses.

In addition, second-order phenomena, which depend on transmitted ultrasound energy, include radiation pressure, forces on particles and acoustic streaming. The important physiological effects of ultrasonic energy on living tissue are thermal, mechanical, chemical and biological.

Which one of these effects is dominant is not clearly understood. However, the intensity of the ultrasound field and the duration of application determines the extent to which the thermal or the mechanical effect by: 2. A review of mechanism of actions of ultrasound waves for treatment of soft tissue injuries.

The physical and biological effects of highfrequency sound waves of great intensity. Ultrasound: Its Chemical, Physical, and Biological Effects. 0 Reviews. From inside the book. What people are saying - Write a review. We haven't found any reviews in the usual places.

acoustic intensities acoustic pressure amplitude acoustic streaming Apfel applications aqueous solutions atoms Benzene Biol biological effects Boudjouk.

Ultrasound: Its Chemical, Physical, and Biological Effects [Suslick, Kenneth] on *FREE* shipping on qualifying offers. Ultrasound: Its Chemical, Physical Cited by: Considerable work followed and in the earliest review paper on this subject, Harvey () reported on the physical, chemical, and biological effects of ultrasound in which alterations were produced in macromolecules, microorganisms, cells, isolated cells, bacteria, tissues, and organs with a view towards the identification of the interaction mechanisms.

The ultrasonic exposure conditions of these Cited by: The physical mechanism of the lesion of biological tissues by focused ultrasound is investigated. The results of measurements of the cavitation thresholds in the brain tissues of experimental.

Thermal and non-thermal physical and biological effects of ultrasound in tissues are the basis of various therapeutic applications.

The thermal effects of ultrasound that arise from the absorption of ultrasonic energy and creation of heat depend on ultrasound exposure parameters, tissue properties and beam configuration (Dalecki ). Acoustic radiation force, radiation torque, acoustic streaming, shock Cited by: ies of the interaction of sound with biological tissues and fluids.

The primary physical mechanism in HIFU is the conversion of acoustic energy into heat, which is often enhanced by nonlinear acoustic propagation and non-linear scattering from bubbles.

Other mechanical effects from ultrasound appear to stimulate an immuneFile Size: KB. The Biological Action of Physical Medicine: Controlling the Human Body's Information System challenges the contemporary way of thinking of diagnostics and therapy "from the outside." Drawing on 30 years of independent comprehensive research, this reference provides a universal and scientifically acceptable physiological theory, explaining the.

This handbook covers, basic physics of ultrasound, operating principles of medical instruments using ultrasound, physical mechanisms for biological effects (thermal and non-thermal), exposure of. Much research has been carried out to study biological effects of this agent, especially, ultrasound, to seek understanding of mechanisms for them.

Since sonic energy is converted into heat as it. either thermal or mechanical mechanisms of ultrasound interaction with the targeted tissue. These thermal and mechanical effects and their biological outcomes – bioeffects – are determined by the type of tissue (i.e.

muscle versus bone) and the acoustic parameters (power, transmission duration, and mode – continuous versus pulsed).File Size: 4MB. Abstract. That ultrasound could produce effects in biological systems became apparent at its inception near the end of World War I when techniques for locating submarines were being by: 1.The sixth course of the School, entitled "Advances in Applications, Biological Effects, and Dosimetry of Ultrasound," provided an in-depth review of all facets of ultra­ sound interactions and their biological effects on living systems, allowing an assessment of the.

Ultrasound produces biological effects by two tissue interactions: heating and cavitation. Heating is caused by the mechanical friction of the tissue moving during passing of the ultrasonic wave. Cavitation is the production and collapse of small bubbles in the inter- and intracellular tissue fluid.