Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels
The ability to rapidly locate blood vessels in patients is important in many clinical applications, e.g., in catheterization procedures. Optical techniques, including visual inspection, generally suffer from a reduced performance at depths below 1 mm, while ultrasound and optoacoustic tomography are...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/12/907 |
| _version_ | 1827637253981077504 |
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| author | Zohar Or Ahiad R. Levi Yoav Hazan Amir Rosenthal |
| author_facet | Zohar Or Ahiad R. Levi Yoav Hazan Amir Rosenthal |
| author_sort | Zohar Or |
| collection | DOAJ |
| description | The ability to rapidly locate blood vessels in patients is important in many clinical applications, e.g., in catheterization procedures. Optical techniques, including visual inspection, generally suffer from a reduced performance at depths below 1 mm, while ultrasound and optoacoustic tomography are better suited to a typical depth on the scale of 1 cm and require an additional spacer between the tissue and transducer in order to image the superficial structures at the focus plane. For this work, we developed a hand-held optoacoustic probe, designed for localizing blood vessels from the contact point down to a depth of 1 cm, without the use of a spacer. The probe employs a flat lens-free ultrasound array, enabling a largely depth-independent response down to a depth of 1 cm, at the expense of low elevational resolution. Specifically, while in lens-based probes, the acoustic signals from outside the focal region suffer from distortion, in our probe, only the amplitude of the signal varies with depth, thus leading to an imaging quality that is largely depth-independent in the imaged region. To facilitate miniaturization, dark-field illumination is used, whereby light scattering from the tissue is exploited to homogenize the sensitivity field. |
| first_indexed | 2024-03-09T15:57:54Z |
| format | Article |
| id | doaj.art-eb648aa62cee4e53a5f97a05dc3fd98b |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T15:57:54Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-eb648aa62cee4e53a5f97a05dc3fd98b2023-11-24T17:24:34ZengMDPI AGPhotonics2304-67322022-11-0191290710.3390/photonics9120907Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood VesselsZohar Or0Ahiad R. Levi1Yoav Hazan2Amir Rosenthal3Electrical and Computer Engineering Department, Technion—Israel Institute of Technology, Haifa 3200003, IsraelElectrical and Computer Engineering Department, Technion—Israel Institute of Technology, Haifa 3200003, IsraelElectrical and Computer Engineering Department, Technion—Israel Institute of Technology, Haifa 3200003, IsraelElectrical and Computer Engineering Department, Technion—Israel Institute of Technology, Haifa 3200003, IsraelThe ability to rapidly locate blood vessels in patients is important in many clinical applications, e.g., in catheterization procedures. Optical techniques, including visual inspection, generally suffer from a reduced performance at depths below 1 mm, while ultrasound and optoacoustic tomography are better suited to a typical depth on the scale of 1 cm and require an additional spacer between the tissue and transducer in order to image the superficial structures at the focus plane. For this work, we developed a hand-held optoacoustic probe, designed for localizing blood vessels from the contact point down to a depth of 1 cm, without the use of a spacer. The probe employs a flat lens-free ultrasound array, enabling a largely depth-independent response down to a depth of 1 cm, at the expense of low elevational resolution. Specifically, while in lens-based probes, the acoustic signals from outside the focal region suffer from distortion, in our probe, only the amplitude of the signal varies with depth, thus leading to an imaging quality that is largely depth-independent in the imaged region. To facilitate miniaturization, dark-field illumination is used, whereby light scattering from the tissue is exploited to homogenize the sensitivity field.https://www.mdpi.com/2304-6732/9/12/907blood vessels imaginghandheld optoacoustic probereal-time imagingunfocused ultrasound transducerwide field of view |
| spellingShingle | Zohar Or Ahiad R. Levi Yoav Hazan Amir Rosenthal Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels Photonics blood vessels imaging handheld optoacoustic probe real-time imaging unfocused ultrasound transducer wide field of view |
| title | Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels |
| title_full | Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels |
| title_fullStr | Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels |
| title_full_unstemmed | Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels |
| title_short | Hand-Held Optoacoustic System for the Localization of Mid-Depth Blood Vessels |
| title_sort | hand held optoacoustic system for the localization of mid depth blood vessels |
| topic | blood vessels imaging handheld optoacoustic probe real-time imaging unfocused ultrasound transducer wide field of view |
| url | https://www.mdpi.com/2304-6732/9/12/907 |
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