| Numerical simulation of the transient temperature field from an annular focused ultrasonic transducer. | |
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MedLine Citation:
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PMID: 12749928 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Knowledge of the extent of the "heated necrosis element" from a single exposure in target tissue created by an ultrasonic beam is critical for the application of focal ultrasound (US) surgery (FUS). This study uses the O'Nell and Pennes formulas to simulate the heated necrosis element from an annular focused transducer and to examine its dependence on exposure dosage, as well as some design parameters of the transducer. Several conclusions may be drawn from our numerical results: 1. With increasing exposure, the heated necrosis element increases, but its contour becomes plumper and the influence of sound intensity I is found to be greater than that of the exposure time t. 2. To get a similar heated necrosis element, the exposure approximately satisfies a relation: It(0. 4 3)=constant. 3. Increasing the US frequency or the outer-radius of the annular transducer leads to a decrease in the heated necrosis volume. |
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Authors:
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Qiang Zhang; Faqi Li; Ruo Feng; Jianyi Xu; Jin Bai; Zhibiao Wang; Yaojun Wang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ultrasound in medicine & biology Volume: 29 ISSN: 0301-5629 ISO Abbreviation: Ultrasound Med Biol Publication Date: 2003 Apr |
Date Detail:
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Created Date: 2003-05-16 Completed Date: 2003-07-14 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: England |
Other Details:
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Languages: eng Pagination: 585-9 Citation Subset: IM |
Affiliation:
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State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Computer Simulation Hot Temperature* Necrosis Transducers Ultrasonic Therapy / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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