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Mc Larney, B. ; Rebling, J. ; Chen, Z. ; Dean-Ben, X.L. ; Gottschalk, S. ; Razansky, D.

Uniform light delivery in volumetric optoacoustic tomography.

J. Biophotonics 12:e201800387 (2019)
Postprint DOI PMC
Open Access Green
Accurate image reconstruction in volumetric optoacoustic tomography implies the efficient generation and collection of ultrasound signals around the imaged object. Non-uniform delivery of the excitation light is a common problem in optoacoustic imaging often leading to a diminished field of view, limited dynamic range and penetration, as well as impaired quantification abilities. Presented here is an optimized illumination concept for volumetric tomography that utilizes additive manufacturing via 3D printing in combination with custom-made optical fiber illumination. The custom-designed sample chamber ensures convenient access to the imaged object along with accurate positioning of the sample and a matrix array ultrasound transducer used for collection of the volumetric image data. Ray tracing is employed to optimize the positioning of the individual fibers in the chamber. Homogeneity of the generated light excitation field was confirmed in tissue-mimicking agar spheres. Applicability of the system to image entire mouse organs ex vivo has been showcased. The new approach showed a clear advantage over conventional, single-sided illumination strategies by eliminating the need to correct for illumination variances and resulting in enhancement of the effective field of view, greater penetration depth and significant improvements in the overall image quality.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords 3d-printing ; Fibers ; Illumination ; Imaging ; Optoacoustics ; Organs
ISSN (print) / ISBN 1864-063X
e-ISSN 1864-0648
Journal Journal of Biophotonics
Quellenangaben Volume: 12, Issue: 6, Pages: , Article Number: e201800387 Supplement: ,
Publisher Wiley
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Biological and Medical Imaging (IBMI)