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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2010.1492
|2 doi
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Seo, Joonho
|e verfasserin
|4 aut
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|a Three-dimensional computer-controlled acoustic pressure scanning and quantification of focused ultrasound
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 28.06.2010
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|a Date Revised 09.04.2010
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|a published: Print
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|a Citation Status MEDLINE
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|a We propose an automated needle hydrophone-based scanning system to measure high-resolution 3-D acoustic pressure distributions generated by high-intensity focused ultrasound (HIFU). The hardware consists of a host computer, subsystems for HIFU generation, and an oscilloscope to sample the pressure response from a sensor in a water tank. Software was developed to control the hardware subsystems, to search for the initial scan position, and to design the scanning path and volume. A preoperative scanning plan with three perpendicular planes is used to manipulate the position of the HIFU transducer and to automate the acquisition of the spatial acoustic pressure distribution. The post-processing process displays the scanning results, compensates time delays caused by continuous linear scans, and quantifies the focal region. A method to minimize the displacement error induced by the time delay improves the scanning speed of a conventional needle hydrophone-based scanning system. Moreover, a noise-robust, automatic-focus searching algorithm using Gaussian function fitting reduces the total number of iterations and prevents the initial scanning position search from diverging. Finally, the minimum-volume enclosing ellipsoid approximation is used to quantify the size and orientation of the 3-D focal region thresholded by the minimum pressure of interest for various input conditions and to test the reproducibility of the scanning system
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Koizumi, Norihiro
|e verfasserin
|4 aut
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| 700 |
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|a Yoshinaka, Kiyoshi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sugita, Naohikoa
|e verfasserin
|4 aut
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| 700 |
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|a Nomiya, Akira
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Homma, Yukio
|e verfasserin
|4 aut
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| 700 |
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|a Matsumoto, Yoichiro
|e verfasserin
|4 aut
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| 700 |
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|a Mitsuishi, Mamoru
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 57(2010), 4 vom: 15. Apr., Seite 883-91
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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| 773 |
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|g volume:57
|g year:2010
|g number:4
|g day:15
|g month:04
|g pages:883-91
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|u http://dx.doi.org/10.1109/TUFFC.2010.1492
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