Piezoelectric line detector array for photoacoustic tomography
Photoacoustic tomography relies on a dense coverage of the surface surrounding the imaged object with ultrasound sensors in order to enable an accurate reconstruction. A curved arrangement of integrating line sensors is proposed that is able to acquire data for a linear projection image of the absor...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-12-01
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| Series: | Photoacoustics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213597917300307 |
| _version_ | 1818249498310213632 |
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| author | Guenther Paltauf Petra Hartmair Georgi Kovachev Robert Nuster |
| author_facet | Guenther Paltauf Petra Hartmair Georgi Kovachev Robert Nuster |
| author_sort | Guenther Paltauf |
| collection | DOAJ |
| description | Photoacoustic tomography relies on a dense coverage of the surface surrounding the imaged object with ultrasound sensors in order to enable an accurate reconstruction. A curved arrangement of integrating line sensors is proposed that is able to acquire data for a linear projection image of the absorbed energy density distribution in the object. Upon rotation of the object relative to the array, three-dimensional (3D) images can be obtained.
The proposed design is based on the cost-effective piezoelectric polymer film technology with 64 line shaped sensors arranged on a half-cylindrical surface. It is combined with an optical parametric oscillator for the near infrared as a source for laser pulses. Image reconstruction from recorded signals consists of two-dimensional (2D) back projection followed by an inverse Radon transform.
The tomograph exhibits a spatial resolution on the order of 200 to 250 μm. In a phantom experiment, the steps from acquisition of a single, 2D projection image to a full 3D image are demonstrated. Finally, in vivo projection images of a human finger are shown, revealing the near real-time imaging capability of the device in 2D. |
| first_indexed | 2024-12-12T15:37:27Z |
| format | Article |
| id | doaj.art-6be6d7aa206045afb32336a0a5a9d9bc |
| institution | Directory Open Access Journal |
| issn | 2213-5979 |
| language | English |
| last_indexed | 2024-12-12T15:37:27Z |
| publishDate | 2017-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Photoacoustics |
| spelling | doaj.art-6be6d7aa206045afb32336a0a5a9d9bc2022-12-22T00:19:59ZengElsevierPhotoacoustics2213-59792017-12-018C283610.1016/j.pacs.2017.09.002Piezoelectric line detector array for photoacoustic tomographyGuenther PaltaufPetra HartmairGeorgi KovachevRobert NusterPhotoacoustic tomography relies on a dense coverage of the surface surrounding the imaged object with ultrasound sensors in order to enable an accurate reconstruction. A curved arrangement of integrating line sensors is proposed that is able to acquire data for a linear projection image of the absorbed energy density distribution in the object. Upon rotation of the object relative to the array, three-dimensional (3D) images can be obtained. The proposed design is based on the cost-effective piezoelectric polymer film technology with 64 line shaped sensors arranged on a half-cylindrical surface. It is combined with an optical parametric oscillator for the near infrared as a source for laser pulses. Image reconstruction from recorded signals consists of two-dimensional (2D) back projection followed by an inverse Radon transform. The tomograph exhibits a spatial resolution on the order of 200 to 250 μm. In a phantom experiment, the steps from acquisition of a single, 2D projection image to a full 3D image are demonstrated. Finally, in vivo projection images of a human finger are shown, revealing the near real-time imaging capability of the device in 2D.http://www.sciencedirect.com/science/article/pii/S2213597917300307OptoacousticThermoacousticTomographyPiezoelectric polymerUltrasound array |
| spellingShingle | Guenther Paltauf Petra Hartmair Georgi Kovachev Robert Nuster Piezoelectric line detector array for photoacoustic tomography Photoacoustics Optoacoustic Thermoacoustic Tomography Piezoelectric polymer Ultrasound array |
| title | Piezoelectric line detector array for photoacoustic tomography |
| title_full | Piezoelectric line detector array for photoacoustic tomography |
| title_fullStr | Piezoelectric line detector array for photoacoustic tomography |
| title_full_unstemmed | Piezoelectric line detector array for photoacoustic tomography |
| title_short | Piezoelectric line detector array for photoacoustic tomography |
| title_sort | piezoelectric line detector array for photoacoustic tomography |
| topic | Optoacoustic Thermoacoustic Tomography Piezoelectric polymer Ultrasound array |
| url | http://www.sciencedirect.com/science/article/pii/S2213597917300307 |
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