A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound
High intensity focused ultrasound (HIFU) is a noninvasive treatment technique to induce thermal or mechanical bioeffects. Characterising the wave field is essential for reliable and reproducible transducer operation in clinical use. This paper presents a schlieren technique to visualise and quantify...
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| Format: | Article |
| Language: | English |
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De Gruyter
2024-12-01
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| Series: | Current Directions in Biomedical Engineering |
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| Online Access: | https://doi.org/10.1515/cdbme-2024-2028 |
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| author | Brecht Luisa Steinmeyer Florian Bonekamp Jörg-Bernd Partanen Ari Grüll Holger Lindemeyer Johannes |
| author_facet | Brecht Luisa Steinmeyer Florian Bonekamp Jörg-Bernd Partanen Ari Grüll Holger Lindemeyer Johannes |
| author_sort | Brecht Luisa |
| collection | DOAJ |
| description | High intensity focused ultrasound (HIFU) is a noninvasive treatment technique to induce thermal or mechanical bioeffects. Characterising the wave field is essential for reliable and reproducible transducer operation in clinical use. This paper presents a schlieren technique to visualise and quantify transducer wave fields. The technique is based on the piezo-optical effect of water, i.e. the refractive index variation caused by sound pressure. Our custom-built system equipped with a Raspberry Pi HQ camera can capture schlieren photographs of acoustic fields generated by a clinical HIFU system. Alternatively, a high-speed camera allows analysis of short burst pulses. We investigated the focal zone shape of continuously generated HIFU fields at acoustic powers of 10- 250 W. Images of the focal area at 100 W indicated dimensions comparable to the reported literature values. Notably, as power increases, we observe waveform distortion in the focal zone due to nonlinear propagation of ultrasound. Our findings demonstrate the efficacy of our system in visualizing and characterizing the acoustic fields generated by a clinical HIFU device. |
| format | Article |
| id | doaj-art-049e503cefb1429fa49ecd9d4ff8608e |
| institution | Kabale University |
| issn | 2364-5504 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Current Directions in Biomedical Engineering |
| spelling | doaj-art-049e503cefb1429fa49ecd9d4ff8608e2025-01-02T05:56:32ZengDe GruyterCurrent Directions in Biomedical Engineering2364-55042024-12-0110411511810.1515/cdbme-2024-2028A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused UltrasoundBrecht Luisa0Steinmeyer Florian1Bonekamp Jörg-Bernd2Partanen Ari3Grüll Holger4Lindemeyer Johannes5University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Diagnostic and Interventional Radiology, Kerpener Str. 62,Cologne, GermanyFaculty of Applied Mathematics, Physics and Humanities, Technische Hochschule Nürnberg,Nuremberg, GermanySoluxx GmbH,Cologne, GermanyProfound Medical, Mississauga,Ontario, CanadaUniversity of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Diagnostic and Interventional Radiology,Cologne, GermanyUniversity of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Diagnostic and Interventional Radiology,Cologne, GermanyHigh intensity focused ultrasound (HIFU) is a noninvasive treatment technique to induce thermal or mechanical bioeffects. Characterising the wave field is essential for reliable and reproducible transducer operation in clinical use. This paper presents a schlieren technique to visualise and quantify transducer wave fields. The technique is based on the piezo-optical effect of water, i.e. the refractive index variation caused by sound pressure. Our custom-built system equipped with a Raspberry Pi HQ camera can capture schlieren photographs of acoustic fields generated by a clinical HIFU system. Alternatively, a high-speed camera allows analysis of short burst pulses. We investigated the focal zone shape of continuously generated HIFU fields at acoustic powers of 10- 250 W. Images of the focal area at 100 W indicated dimensions comparable to the reported literature values. Notably, as power increases, we observe waveform distortion in the focal zone due to nonlinear propagation of ultrasound. Our findings demonstrate the efficacy of our system in visualizing and characterizing the acoustic fields generated by a clinical HIFU device.https://doi.org/10.1515/cdbme-2024-2028piezo-opticsschlierenshadowgraphyhigh intensity focused ultrasoundhifuboiling histotripsyacoustic field characterization |
| spellingShingle | Brecht Luisa Steinmeyer Florian Bonekamp Jörg-Bernd Partanen Ari Grüll Holger Lindemeyer Johannes A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound Current Directions in Biomedical Engineering piezo-optics schlieren shadowgraphy high intensity focused ultrasound hifu boiling histotripsy acoustic field characterization |
| title | A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound |
| title_full | A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound |
| title_fullStr | A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound |
| title_full_unstemmed | A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound |
| title_short | A Custom-Built Piezo-Optical System for Visualization and Characterization of High Intensity Focused Ultrasound |
| title_sort | custom built piezo optical system for visualization and characterization of high intensity focused ultrasound |
| topic | piezo-optics schlieren shadowgraphy high intensity focused ultrasound hifu boiling histotripsy acoustic field characterization |
| url | https://doi.org/10.1515/cdbme-2024-2028 |
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