Didactic software for modeling heating patterns in tissues irradiated by therapeutic ultrasound.
Introduction: Ultrasound is a resource commonly used in Physical Therapy. However, its inadequate application may produce insufficient heating or cause damage to biological tissues. Therefore, the knowledge on the optimum parameters for achieving the appropriate temperature, within safe limits, is n...
| Publicado en: | Brazilian Journal of Physical Therapy Vol. 12; no. 3; pp. 204 - 215 |
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| Autores principales: | , , , |
| Formato: | abstract equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Elsevier B.V.
mai/jun2008
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105806320&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105806320 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14133555 1FEL jtl: Brazilian Journal of Physical Therapy issn: 14133555 maglogo: N pubinfo: dt: mai/jun2008 vid: 12 iid: 3 pid: 82545 pub: Elsevier B.V. place: Philadelphia, Pennsylvania artinfo: ui: 105806320 105806320 2009983835 10.1590/s1413-35552008000300008 105806320 ppf: 204 ppct: 11 formats: tig: atl: Didactic software for modeling heating patterns in tissues irradiated by therapeutic ultrasound. aug: au: Maggi LE Omena TP von Krüger MA Pereira WCA sug: subj: Heating Software Tissue Physiology Ultrasonography Computer Simulation Funding Source Models, Statistical Physical Therapy Ultrasonography Adverse Effects Human ab: Introduction: Ultrasound is a resource commonly used in Physical Therapy. However, its inadequate application may produce insufficient heating or cause damage to biological tissues. Therefore, the knowledge on the optimum parameters for achieving the appropriate temperature, within safe limits, is necessary. Heat generation depends on equipment parameters and the physical properties of tissues. This study presented a software that simulates the energy and temperature variation in tissues over time, thus allowing users to view the heating patterns in tissues as a function of these parameters. Methods: The software was implemented based on the bioheat transfer equation for four layers (skin, fat, muscle and bone), in which the user can change the thickness and thermal or acoustic properties of these tissues. The intensity, frequency and time of application can also be chosen. Graphs showing the percentage energy absorption in relation to depth and the respective temperature variation per millimeter of tissue are presented. Results: Simulations were produced to give examples of situations of interest for therapy, by varying the time of application, thickness and ultrasound frequency. Differences in heating patterns are seen, especially at the interfaces. Conclusions: The software made it possible to study the heating of biological tissues by ultrasound and can be used both for teaching purposes and for planning heating doses for continuous waves. In the future, the software will be adapted, in order to estimate which dose should be regulated in the apparatus to maintain the desired temperature for the time chosen. Software available in: http://www.peb.ufrj.br/lus.htm. pubtype: Academic Journal doctype: abstract equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: Portuguese refInfo: holdings: @attributes: islocal: N |
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