Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms
Numerous diseases such as hemorrhage, sepsis or cardiogenic shock induce a heterogeneous perfusion of the capillaries. To detect such alterations in the human blood flow pattern, diagnostic devices must provide an appropriately high spatial resolution. Shifted position-diffuse reflectance imaging (S...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/24/9880 |
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| author | Moritz Späth Alexander Romboy Ijeoma Nzenwata Maximilian Rohde Dongqin Ni Lisa Ackermann Florian Stelzle Martin Hohmann Florian Klämpfl |
| author_facet | Moritz Späth Alexander Romboy Ijeoma Nzenwata Maximilian Rohde Dongqin Ni Lisa Ackermann Florian Stelzle Martin Hohmann Florian Klämpfl |
| author_sort | Moritz Späth |
| collection | DOAJ |
| description | Numerous diseases such as hemorrhage, sepsis or cardiogenic shock induce a heterogeneous perfusion of the capillaries. To detect such alterations in the human blood flow pattern, diagnostic devices must provide an appropriately high spatial resolution. Shifted position-diffuse reflectance imaging (SP-DRI) has the potential to do so; it is an all-optical diagnostic technique. So far, SP-DRI has mainly been developed using Monte Carlo simulations. The present study is therefore validating this algorithm experimentally on realistic optical phantoms with thread structures down to 10 μm in diameter; a SP-DRI sensor prototype was developed and realized by means of additive manufacturing. SP-DRI turned out to be functional within this experimental framework. The position of the structures within the optical phantoms become clearly visible using SP-DRI, and the structure thickness is reflected as modulation in the SP-DRI signal amplitude; this performed well for a shift along the <i>x</i> axis as well as along the <i>y</i> axis. Moreover, SP-DRI successfully masked the pronounced influence of the illumination cone on the data. The algorithm showed significantly superior to a mere raw data inspection. Within the scope of the study, the constructive design of the SP-DRI sensor prototype is discussed and potential for improvement is explored. |
| first_indexed | 2024-03-09T15:53:02Z |
| format | Article |
| id | doaj.art-e50bf83e105f41d1a4f00bd7d81d5baa |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T15:53:02Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e50bf83e105f41d1a4f00bd7d81d5baa2023-11-24T17:56:53ZengMDPI AGSensors1424-82202022-12-012224988010.3390/s22249880Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical PhantomsMoritz Späth0Alexander Romboy1Ijeoma Nzenwata2Maximilian Rohde3Dongqin Ni4Lisa Ackermann5Florian Stelzle6Martin Hohmann7Florian Klämpfl8Institute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyInstitute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyInstitute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyErlangen Graduate School in Advanced Optical Technologies, 91052 Erlangen, GermanyInstitute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyInstitute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyErlangen Graduate School in Advanced Optical Technologies, 91052 Erlangen, GermanyInstitute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyInstitute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, GermanyNumerous diseases such as hemorrhage, sepsis or cardiogenic shock induce a heterogeneous perfusion of the capillaries. To detect such alterations in the human blood flow pattern, diagnostic devices must provide an appropriately high spatial resolution. Shifted position-diffuse reflectance imaging (SP-DRI) has the potential to do so; it is an all-optical diagnostic technique. So far, SP-DRI has mainly been developed using Monte Carlo simulations. The present study is therefore validating this algorithm experimentally on realistic optical phantoms with thread structures down to 10 μm in diameter; a SP-DRI sensor prototype was developed and realized by means of additive manufacturing. SP-DRI turned out to be functional within this experimental framework. The position of the structures within the optical phantoms become clearly visible using SP-DRI, and the structure thickness is reflected as modulation in the SP-DRI signal amplitude; this performed well for a shift along the <i>x</i> axis as well as along the <i>y</i> axis. Moreover, SP-DRI successfully masked the pronounced influence of the illumination cone on the data. The algorithm showed significantly superior to a mere raw data inspection. Within the scope of the study, the constructive design of the SP-DRI sensor prototype is discussed and potential for improvement is explored.https://www.mdpi.com/1424-8220/22/24/9880SP-DRIbiomedical imagingall-opticalmedical diagnosticsoptical phantomsexperimental validation |
| spellingShingle | Moritz Späth Alexander Romboy Ijeoma Nzenwata Maximilian Rohde Dongqin Ni Lisa Ackermann Florian Stelzle Martin Hohmann Florian Klämpfl Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms Sensors SP-DRI biomedical imaging all-optical medical diagnostics optical phantoms experimental validation |
| title | Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms |
| title_full | Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms |
| title_fullStr | Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms |
| title_full_unstemmed | Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms |
| title_short | Experimental Validation of Shifted Position-Diffuse Reflectance Imaging (SP-DRI) on Optical Phantoms |
| title_sort | experimental validation of shifted position diffuse reflectance imaging sp dri on optical phantoms |
| topic | SP-DRI biomedical imaging all-optical medical diagnostics optical phantoms experimental validation |
| url | https://www.mdpi.com/1424-8220/22/24/9880 |
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