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Direct methods for characterizing high-intensity focused ultrasound transducers using acoustic streaming
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10.1121/1.2957937
/content/asa/journal/jasa/124/3/10.1121/1.2957937
http://aip.metastore.ingenta.com/content/asa/journal/jasa/124/3/10.1121/1.2957937

Figures

Image of FIG. 1.
FIG. 1.

Streaming velocity contour for HIFU-3 transducer. Acoustic power: .

Image of FIG. 2.
FIG. 2.

Comparison of radial streaming velocity profile obtained from (i) PIV experiments and from (ii) curve fitting the experimental velocity with the error function expression. Transducer: HIFU-2; acoustic power: .

Image of FIG. 3.
FIG. 3.

Effect of mesh size: Acoustic intensity as a function of radial distance (cm) obtained from finite-difference method for three different mesh sizes (i) , (ii) , and (iii) . Acoustic power: ; transducer: HIFU-3.

Image of FIG. 4.
FIG. 4.

(a) Acoustic intensity as a function of radial distance (cm) obtained from the finite-difference, Gaussian curve fit, and iterative methods. Acoustic power: ; transducer: HIFU-1. (b) Normalized acoustic intensity as a function of radial distance (cm) obtained from the finite-difference, Gaussian curve fit, and iterative methods. Acoustic power: ; transducer: HIFU-1.

Image of FIG. 5.
FIG. 5.

(a) Acoustic intensity as a function of axial distance (cm) obtained from the finite-difference, Gaussian curve fit, and iterative methods. Acoustic power: ; transducer: HIFU-1. (b) Normalized acoustic intensity as a function of axial distance (cm) obtained from the finite-difference, Gaussian curve fit, and iterative methods. Acoustic power: ; transducer: HIFU-1.

Image of FIG. 6.
FIG. 6.

(a) Acoustic intensity as a function of radial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurement. Acoustic power: ; transducer: HIFU-2. (b) Normalized acoustic intensity as a function of radial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurement. Acoustic power: ; transducer: HIFU-2.

Image of FIG. 7.
FIG. 7.

(a) Acoustic intensity as a function of axial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurement. Acoustic power: ; transducer: HIFU-2. (b) Normalized acoustic intensity as a function of axial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurement. Acoustic power: ; transducer: HIFU-2.

Image of FIG. 8.
FIG. 8.

(a) Acoustic intensity as a function of radial distance (cm) obtained from the methods: (i) finite difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurements. Acoustic power: ; transducer: HIFU-3. (b) Normalized acoustic intensity as a function of radial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurements. Acoustic power: ; transducer: HIFU-3.

Image of FIG. 9.
FIG. 9.

(a) Acoustic intensity as a function of axial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (iii) iterative, and (iv) hydrophone measurements. Acoustic power: ; transducer: HIFU-3. (b) Normalized acoustic intensity as a function of axial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, (ii) iterative, and (iv) hydrophone measurements. Acoustic power: ; transducer: HIFU-3.

Image of FIG. 10.
FIG. 10.

Radial intensity profiles obtained from (i) GCF method, (ii) hydrophone measurements, and (iii) polynomial curve fit of GCF results. Acoustic power: ; transducer: HIFU 3.

Image of FIG. 11.
FIG. 11.

Acoustic intensity as a function of radial distance (cm) obtained from the methods: (i) finite-difference, (ii) Gaussian curve fit, and (iii) iterative. Acoustic power: ; transducer: HIFU 3.

Image of FIG. 12.
FIG. 12.

Peak acoustic intensity as a function of input acoustic power (W) for HIFU 3 transducer.

Tables

Generic image for table
TABLE I.

Physical characteristics of HIFU transducers used in the experiments.

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/content/asa/journal/jasa/124/3/10.1121/1.2957937
2008-09-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct methods for characterizing high-intensity focused ultrasound transducers using acoustic streaming
http://aip.metastore.ingenta.com/content/asa/journal/jasa/124/3/10.1121/1.2957937
10.1121/1.2957937
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