Enabling the autofocus approach for parameter optimization in planar measurement geometry clinical optoacoustic imaging
| Autor: | Ludwig Englert, Lucas Riobo, Christine Schönmann, Vasilis Ntziachristos, Juan Aguirre |
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| Rok vydání: | 2022 |
| Předmět: |
Phantoms
Imaging General Engineering ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION General Physics and Astronomy FOS: Physical sciences General Materials Science General Chemistry Medical Physics (physics.med-ph) Tomography X-Ray Computed Autofocus Image Formation Algorithm Optoacoustics Photoacoustics Speed Of Sound Physics - Medical Physics Algorithms General Biochemistry Genetics and Molecular Biology |
| Zdroj: | J. Biophotonics 15:e202200032 (2022) |
| DOI: | 10.48550/arxiv.2203.06011 |
| Popis: | In optoacoustic (photoacoustic) tomography, several parameters related to tissue and detector features are needed for image formation, but they may not be known a priori. An autofocus (AF) algorithm is generally used to estimate these parameters. However, the algorithm works iteratively, therefore, it is impractical for clinical imaging with systems featuring planar geometry due to long reconstruction times. We have developed a fast autofocus (FAF) algorithm for optoacoustic systems with planar geometry that is much simpler computationally than the conventional AF algorithm. We show that the FAF algorithm required about 5 sec. to provide accurate estimates of the speed of sound in simulated data and experimental data obtained using an imaging system that is poised to enter the clinic. The applicability of FAF for estimating other image formation parameters is discussed. We expect the FAF algorithm to contribute decisively to the clinical use of optoacoustic tomography systems with planar geometry. Comment: 12 pages, 3 figures |
| Databáze: | OpenAIRE |
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