Zusammenfassung
Optical coherence tomography (OCT) is a non-invasive, micrometer-scale imaging modality that has become a clinical standard in ophthalmology. By raster-scanning the retina, sequential cross-sectional image slices are acquired to generate volumetric data. In-vivo imaging suffers from discontinuities between slices that show up as motion and illumination artifacts.We present a new illumination model that exploits continuity in orthogonally raster-scanned volume data [1]. Our novel spatiotemporal parametrization adheres to illumination continuity both temporally, along the imaged slices, as well as spatially, in the transverse directions. Yet, our formulation does not make inter-slice assumptions, which could have discontinuities. This is the first optimization of a 3D inverse model in an image reconstruction context in OCT. Evaluation in 68 volumes from eyes with pathology showed reduction of illumination artifacts in 88% of the data, and only 6% showed moderate residual illumination artifacts. The method enables the use of forward-warped motion corrected data [2], which is more accurate, and enables supersampling and advanced 3D image reconstruction in OCT [3, 4].
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Ploner S, Won J, Schottenhamml J, Girgis J, Lam K, Waheed N et al. A spatiotemporal illumination model for 3d image fusion in optical coherence tomography. 2023 IEEE 20th International Symposium on Biomedical Imaging (ISBI). 2023:1–5.
Ploner S, Chen S,Won J, Husvogt L, Breininger K, Schottenhamml J et al. A spatiotemporal model for precise and efficient fully-automatic 3D motion correction in OCT. Medical Image Computing and Computer Assisted Intervention: MICCAI 2022. Ed. by Wang L, Dou Q, Fletcher PT, Speidel S, Li S. Cham: Springer Nature Switzerland, 2022:517–27.
Won J, Yaghy A, Ploner S, Takahashi H, Reimann M, Girgis JM et al. Motion correction and volume merging of ultrahigh resolution OCT enable 3D visualization and longitudinal tracking of hyperreflective foci. ARVO Imaging in the Eye Conference 2023, Invest. Ophthal. & Vis. Sci. Vol. 64. (9). 2023:PP0018–PP0018.
Ploner S, Won J, Yaghy A, Lam K, Girgies J, Schottenhamml J et al. Advanced volume rebuilding overcomes quilting, stretching, and banding image artifacts in orthogonally-scanned OCT. ARVO Annual Meeting 2023, Invest. Ophthal. & Vis. Sci. Vol. 64. (9). 2023:2371–1.
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© 2024 Der/die Autor(en), exklusiv lizenziert an Springer Fachmedien Wiesbaden GmbH, ein Teil von Springer Nature
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Ploner, S.B. et al. (2024). Abstract: Spatiotemporal Illumination Model for 3D Image Fusion in Optical Coherence Tomography. In: Maier, A., Deserno, T.M., Handels, H., Maier-Hein, K., Palm, C., Tolxdorff, T. (eds) Bildverarbeitung für die Medizin 2024. BVM 2024. Informatik aktuell. Springer Vieweg, Wiesbaden. https://doi.org/10.1007/978-3-658-44037-4_57
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DOI: https://doi.org/10.1007/978-3-658-44037-4_57
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