2023

Leo Puyo, Clara Pfäffle, Hendrik Spahr, Jonas Franke, Daniel Bublitz, Dierck Hillmann, and Gereon Hüttmann,
Diffuse-illumination holographic optical coherence tomography, Opt. Express , vol. 31, no. 20, pp. 33500--33517, 2023. Optica Publishing Group.
DOI:10.1364/OE.498654
Datei: abstract.cfm
Bibtex: BibTeX
@article{Puyo:23,
author = {L\'{e}o Puyo and Clara Pf\"{a}ffle and Hendrik Spahr and Jonas Franke and Daniel Bublitz and Dierck Hillmann and Gereon H\"{u}ttmann},
journal = {Opt. Express},
keywords = {Fourier optics; Full field optical coherence tomography; Image quality; Imaging techniques; Spatial frequency; Spatial light modulators},
number = {20},
pages = {33500--33517},
publisher = {Optica Publishing Group},
title = {Diffuse-illumination holographic optical coherence tomography},
volume = {31},
month = {Sep},
year = {2023},
url = {https://opg.optica.org/oe/abstract.cfm?URI=oe-31-20-33500},
doi = {10.1364/OE.498654},
abstract = {Holographic optical coherence tomography (OCT) is a powerful imaging technique, but its ability to reveal low-reflectivity features is limited. In this study, we performed holographic OCT by incoherently averaging volumes with changing diffuse illumination of numerical aperture (NA) equal to the detection NA. While the reduction of speckle from singly scattered light is only modest, we discovered that speckle from multiply scattered light can be arbitrarily reduced, resulting in substantial improvements in image quality. This technique also offers the advantage of suppressing noises arising from spatial coherence, and can be implemented with a partially spatially incoherent light source for further mitigation of multiple scattering. Finally, we show that although holographic reconstruction capabilities are increasingly lost with decreasing spatial coherence, they can be retained over an axial range sufficient to standard OCT applications.},
}

2022

Clara Pfäffle, Hendrik Spahr, Katharina Gercke, Leo Puyo, Svea Höhl, David Melenberg, Yoko Miura, Gereon Hüttmann, and Dierck Hillmann,
Phase-Sensitive Measurements of Depth-Dependent Signal Transduction in the Inner Plexiform Layer, Frontiers in Medicine , vol. 9, 06 2022.
DOI:10.3389/fmed.2022.885187
Datei: fmed.2022.885187
Bibtex: BibTeX
@article{RN5328,
   author = {Pfäffle, C;Spahr, H;Gercke, K;Puyo, L;Höhl, S;Melenberg, D;Miura, Y;Hüttmann, G and Hillmann, D},
   title = {Phase-Sensitive Measurements of Depth-Dependent Signal Transduction in the Inner Plexiform Layer},
   journal = {Frontiers in Medicine},
   volume = {9},
   ISSN = {2296-858X},
   DOI = {10.3389/fmed.2022.885187},
keywords = {optoretinography, optical coherence tomography, phase-sensitive OCT, functional imaging, inner
plexiform layer, retina},
   url = {https://www.frontiersin.org/articles/10.3389/fmed.2022.885187},
   year = {2022},
   type = {Journal Article}
}

2021

Clara Pfäffle, Hendrik Spahr, Katharina Gercke, Sazan Burhan, David Melenberg, Yoko Miura, Gereon Hüttmann, and Dierck Hillmann,
Phase-sensitive measurements of depth dependent signal transduction in the inner plexiform layer, in SPIE BIOS , SPIE, 082021.
DOI:10.1117/12.2577605
Bibtex: BibTeX
@inproceedings{RN5321,
   author = {Pfäffle, C;Spahr, H;Gercke, K;Burhan, S;Melenberg, D;Miura, Y;Hüttmann, G and Hillmann, D},
   title = {Phase-sensitive measurements of depth dependent signal transduction in the inner plexiform layer},
   booktitle = {SPIE BiOS},
   publisher = {SPIE},
   volume = {11623},
   url = {https://doi.org/10.1117/12.2577605},
   type = {Conference Proceedings}
}

2020

Vasily Matkivsky, Alexander Moiseev, Pavel Shilyagin, Alexander Rodionov, Hendrik Spahr, Clara Pfäffle, Gereon Hüttmann, Dierck Hillmann, and Grigory Gelikonov,
Determination and correction of aberrations in full field optical coherence tomography using phase gradient autofocus by maximizing the likelihood function, Journal of Biophotonics , vol. 13(10), pp. e202000112, 2020.
DOI:10.1002/jbio.202000112
Bibtex: BibTeX
@article{Matkivsky2020,
   author = {Matkivsky, V;Moiseev, A;Shilyagin, P;Rodionov, A;Spahr, H;Pfäffle, C;Hüttmann, G;Hillmann, D and Gelikonov, G},
   title = {Determination and correction of aberrations in full field optical coherence tomography using phase gradient autofocus by maximizing the likelihood function},
   journal = {Journal of Biophotonics},
   volume = {13(10)},
   pages = {e202000112},
   ISSN = {1864-063X},
   DOI = {10.1002/jbio.202000112},
   year = {2020},
   type = {Journal Article}
}

2019

Hendrik Spahr, Clara Pfäffle, Sazan Burhan, Lisa Kutzner, Felix Hilge, Gereon Hüttmann, and Dierck Hillmann,
Phase-sensitive interferometry of decorrelated speckle patterns, Scientific report , vol. 9, 08 2019.
DOI:10.1038/s41598-019-47979-8
Bibtex: BibTeX
@article{RN5217,
   author = {Spahr, Hendrik;Pfäffle, Clara;Burhan, Sazan;Kutzner, Lisa;Hilge, Felix;Hüttmann, Gereon and Hillmann, Dierck},
   title = {Phase-sensitive interferometry of decorrelated speckle patterns},
   journal = {Scientific Reports},
   volume = {9},
   number = {1},
   pages = {11748},
   ISSN = {2045-2322},
   DOI = {10.1038/s41598-019-47979-8},
   url = {https://doi.org/10.1038/s41598-019-47979-8},
   year = {2019},
   type = {Journal Article}
}
Hendrik Spahr, Clara Pfäffle, Gereon Hüttmann, and Dierck Hillmann,
Artifacts in speckle tracking and multi-aperture Doppler OCT imaging of lateral motion, Opt. Lett. , vol. 44, no. 6, pp. 1315--1318, 03 2019. Optica Publishing Group.
DOI:10.1364/OL.44.001315
Datei: abstract.cfm
Bibtex: BibTeX
@article{RN5085,
   author = {Spahr, H;Pfäffle, C;Hüttmann, G and Hillmann, D},
   title = {Artifacts in speckle tracking and multi-aperture
Doppler OCT imaging of lateral motion},
   journal = {Optics letters},
   volume = {44(5)},
   pages = {1315-1318},
   DOI = {https://doi.org/10.1364/OL.44001315},
   url = {https://doi.org/10.1364/OL.44001315},
   year = {2019},
   type = {Journal Article}
}
Dierck Hillmann, Clara Pfäffle, Hendrik Spahr, Sazan Burhan, Lisa Kutzner, Felix Hilge, and Gereon Hüttmann,
Computational adaptive optics for optical coherence tomography using multiple randomized subaperture correlations, Opt Lett 44 (15) , pp. 3905-3908, 2019.
DOI:10.1364/OL.44.003905
Datei: 31368998
Bibtex: BibTeX
@article{Hillmann2019,
   author = {Hillmann, D.;Pfaffle, C.;Spahr, H.;Burhan, S.;Kutzner, L.;Hilge, F. and Hüttmann, G.},
   title = {Computational adaptive optics for optical coherence tomography using multiple randomized subaperture correlations},
   journal = {Opt Lett 44 (15)},
 
   pages = {3905-3908},
   ISSN = {1539-4794 (Electronic)
0146-9592 (Linking)},
   DOI = {10.1364/OL.44.003905},
   url = {https://www.ncbi.nlm.nih.gov/pubmed/31368998},
   year = {2019},
   type = {Journal Article}
}
Dierck Hillmann, Clara Pfäffle, Hendrik Spahr, Helge Sudkamp, Gesa Franke, and Gereon Hüttmann,
In Vivo FF-SS-OCT Optical Imaging of Physiological Responses to Photostimulation of Human Photoreceptor Cells, in High Resolution Imaging in Microscopy and Ophthalmology: New Frontiers in Biomedical Optics , Bille, Josef F., Eds. Cham: Springer International Publishing, 2019, pp. 181-194.
ISBN:978-3-030-16638-0
Datei: 978-3-030-16638-0_8
Bibtex: BibTeX
@inbook{Hillmann2019,
   author = {Hillmann, Dierck;Pfäffle, Clara;Spahr, Hendrik;Sudkamp, Helge;Franke, Gesa and Hüttmann, Gereon},
   title = {In Vivo FF-SS-OCT Optical Imaging of Physiological Responses to Photostimulation of Human Photoreceptor Cells},
   booktitle = {High Resolution Imaging in Microscopy and Ophthalmology: New Frontiers in Biomedical Optics},
   editor = {Bille, Josef F.},
   publisher = {Springer International Publishing},
   address = {Cham},
   pages = {181-194},
   ISBN = {978-3-030-16638-0},
   
   url = {https://doi.org/10.1007/978-3-030-16638-0_8},
   year = {2019},
   type = {Book Section}
}
C. Pfäffle, and D. Hillmann,
Artifacts in speckle tracking and multi-aperture Doppler OCT imaging of lateral motion, Opt Lett , pp. 1315-1318, 2019.
Datei: OL.44.001315
Bibtex: BibTeX
@article{Spahr2019,
   author = {Spahr, H; Pfäffle, C; Huettmann, G and Hillmann, D},
   title = { Artifacts in speckle tracking and multi-aperture
Doppler OCT imaging of lateral motion},
   journal = { Opt Lett},
   pages = {1315-1318},
URL = {https://doi.org/10.1364/OL.44.001315},
   year = {2019},
   type = {Journal Article}
}
Clara Pfäffle, Hendrik Spahr, Lisa Kutzner, Sazan Burhan, Felix Hilge, Yoko Miura, Gereon Hüttmann, and Dierck Hillmann,
Simultaneous functional imaging of neuronal and photoreceptor layers in living human retina, Optics Letters 44(23) , pp. 5671-5674, 2019.
DOI:10.1364/OL.44.005671
Bibtex: BibTeX
@article{Pfäffle2019,
   author = {Pfäffle, C;Spahr, H;Kutzner, L;Burhan, S;Hilge, F;Miura, Y;Hüttmann, G and Hillmann, D},
   title = {Simultaneous functional imaging of neuronal and photoreceptor layers in living human retina},
   journal = {Optics Letters 44(23)},
 
   pages = {5671-5674},
   DOI = {10.1364/OL.44.005671},
   
   year = {2019},
   type = {Journal Article}
}

2018

Helge Sudkamp, Dierck Hillmann, Peter Koch, Malte vom Endt, Hendrik Spahr, Michael Münst, Clara Pfäffle, Reginald Birngruber, and Gereon Hüttmann,
Simple approach for aberration-corrected OCT imaging of the human retina, Opt Lett , vol. 43, no. 17, pp. 4224, 08 2018.
DOI:10.1364/ol.43.004224
Bibtex: BibTeX
@article{Sudkamp2018a,
   author = {Sudkamp, H; Hillmann, D; Koch, P;vom Endt, M; Spahr, H; Münst, M; Pfäffle, C; Birngruber, R and Hüttmann, G},
   title = {Simple approach for aberration-corrected OCT imaging of the human retina},
   journal = {Opt Lett},
   
   pages = {4224},
   ISSN = {0146-9592
1539-4794},
   DOI = {10.1364/ol.43.004224},
   year = {2018},
   type = {Journal Article},
   keyword = {Retome}
}

2017

Clara Pfäffle, Hendrik Spahr, Dierck Hillmann, Helge Sudkamp, Gesa Franke, Peter Koch, and Gereon Hüttmann,
Reduction of frame rate in full-field swept-source optical coherence tomography by numerical motion correction [Invited], Biomedical Optics Express , vol. 8, no. 3, pp. 1499-1511, 03 2017. https://doi.org/10.1364/BOE.8.001499 .
DOI:10.1364/BOE.8.001499
Weblink: https://doi.org/10.1364/BOE.8.001499
Datei: abstract.cfm
Bibtex: BibTeX
@article{Pfäffle2017,
   author = {Pfäffle, Clara and Spahr, Hendrik and Hillmann, Dierck and Sudkamp, Helge and Franke, Gesa and Koch, Peter and Hüttmann, Gereon},
   title = {Reduction of frame rate in full-field swept-source optical coherence tomography by numerical motion correction [Invited]},
   journal = {Biomedical Optics Express},
   volume = {8},
   number = {3},
   pages = {1499-1511},
   keywords = {Image reconstruction-restoration
Optical coherence tomography},
   url = {http://www.osapublishing.org/boe/abstract.cfm?URI=boe-8-3-1499},
   year = {2017},
   type = {Journal Article}
}

2016

Hendrik Spahr, Dierck Hillmann, Carola Hain, Clara Pfäffle, Helge Sudkamp, Gesa Franke, Peter Koch, and Gereon Hüttmann,
Darstellung von Blutfluss und Pulsation in retinalen Gefäßen mit Full-Field-Swept-Source-OCT, Klin Monatsbl Augenheilkd , vol. 233, no. 12, pp. 1324-1330, Okt. 2016.
DOI:10.1055/s-0042-120279
Bibtex: BibTeX
@article{Spahr2016,
   author = {Spahr, H. and Hillmann, D. and Hain, C. and Pfäffle, C. and Sudkamp, H. and Franke, G. and Koch, P. and Hüttmann, G.},
   title = {Darstellung von Blutfluss und Pulsation in retinalen Gefäßen mit Full-Field-Swept-Source-OCT},
   journal = {Klin Monatsbl Augenheilkd},
   volume = {233},
   number = {12},
   pages = {1324-1330},
   ISSN = {0023-2165},
   DOI = {10.1055/s-0042-120279},
   year = {2016},
   type = {Journal Article}
}
Dierck Hillmann, Hendrik Spahr, Carola Hain, Helge Sudkamp, Gesa Franke, Clara Pfäffle, Christian Winter, and Gereon Hüttmann,
Aberration-free volumetric high-speed imaging of in vivo retina, Scientific Reports , vol. 6, pp. 1-11, 2016.
Datei: srep35209
Bibtex: BibTeX
@article{Hillmann2016,
   author = {Hillmann, Dierck and Spahr, Hendrik and Hain, Carola and Sudkamp, Helge and Franke, Gesa and Pfäffle, Clara and Winter, Christian and Hüttmann, Gereon},
   title = {Aberration-free volumetric high-speed imaging of in vivo retina},
   journal = {Scientific Reports},
   volume = {6},
   pages = {1-11},
   url = {http://dx.doi.org/10.1038/srep35209},
   year = {2016},
   type = {Journal Article}
}
Hendrik Spahr, Dierck Hillmann, Carola Hain, Clara Pfäffle, Helge Sudkamp, Gesa Franke, and Gereon Hüttmann,
Imaging vascular dynamics in human retina using full-field swept-source optical coherence tomography (Conference Presentation), 2016. pp. 96970E-96970E-1.
DOI:10.1117/12.2214303
Datei: 12.2214303
Bibtex: BibTeX
@inproceedings{Spahr2016,
   author = {Spahr, Hendrik and Hillmann, Dierck and Hain, Carola and Pfäffle, Clara and Sudkamp, Helge and Franke, Gesa and Hüttmann, Gereon},
   title = {Imaging vascular dynamics in human retina using full-field swept-source optical coherence tomography (Conference Presentation)},
   volume = {9697},
   pages = {96970E-96970E-1},
   note = {10.1117/12.2214303},
   abstract = {We demonstrate a new non-invasive method to assess the functional condition of the retinal vascular system. Phase-sensitive full-field swept-source optical coherence tomography (PhS-FF-SS-OCT) is used to investigate retinal vascular dynamics at unprecedented temporal resolution. Motion of retinal tissue, that is induced by expansion of the vessels therein, is measured with an accuracy of about 10 nm. The pulse shape of arterial and venous pulsation, their temporal delay as well as the frequency dependent pulse propagation through the capillary bed are determined. For the first time, imaging speed and motion sensitivity are sufficient for a direct measurement of pulse waves propagating with more than 600 mm/s in retinal vessels of a healthy young subject.},
   url = {http://dx.doi.org/10.1117/12.2214303},
   type = {Conference Proceedings},
year = { 2016}
}
Dierck Hillmann, Hendrik Spahr, Clara Pfäffle, Helge Sudkamp, Gesa Franke, and Gereon Hüttmann,
In vivo optical imaging of physiological responses to photostimulation in human photoreceptors, PNAS Early Edition , pp. 1-6, 2016.
Datei: 1606428113.abstract
Bibtex: BibTeX
@article{Hillmann2016,
   author = {Hillmann, Dierck and Spahr, Hendrik and Pfäffle, Clara and Sudkamp, Helge and Franke, Gesa and Hüttmann, Gereon},
   title = {In vivo optical imaging of physiological responses to photostimulation in human photoreceptors},
   journal = {PNAS Early Edition},
   pages = {1-6},
   abstract = {Noninvasive functional imaging of molecular and cellular processes of vision may have immense impact on research and clinical diagnostics. Although suitable intrinsic optical signals (IOSs) have been observed ex vivo and in immobilized animals in vivo, detecting IOSs of photoreceptor activity in living humans was cumbersome and time consuming. Here, we observed clear spatially and temporally resolved changes in the optical path length of the photoreceptor outer segment as a response to an optical stimulus in the living human eye. To witness these changes, we evaluated phase data obtained with a parallelized and computationally aberration-corrected optical coherence tomography system. The noninvasive detection of optical path length changes shows neuronal photoreceptor activity of single cones in living human retina, and therefore, it may provide diagnostic options in ophthalmology and neurology and could provide insights into visual phototransduction in humans.},
   url = {http://www.pnas.org/content/early/2016/10/10/1606428113.abstract},
   year = {2016},
   type = {Journal Article}
}

2015

Hendrik Spahr, Dierck Hillmann, Carola Hain, Clara Pfäffle, Helge Sudkamp, Gesa Franke, and Gereon Hüttmann,
Imaging pulse wave propagation in human retinal vessels using full-field swept-source optical coherence tomography, Optics Letters , vol. 40, no. 20, pp. 4771-4774, Okt. 2015.
DOI:10.1364/OL.40.004771
Datei: abstract.cfm
Bibtex: BibTeX
@article{Spahr2015,
   author = {Spahr, Hendrik and Hillmann, Dierck and Hain, Carola and Pfäffle, Clara and Sudkamp, Helge and Franke, Gesa and Hüttmann, Gereon},
   title = {Imaging pulse wave propagation in human retinal vessels using full-field swept-source optical coherence tomography},
   journal = {Optics Letters},
   volume = {40},
   number = {20},
   pages = {4771-4774},
   abstract = {We demonstrate a new noninvasive method to assess biomechanical properties of the retinal vascular system. Phase-sensitive full-field swept-source optical coherence tomography (PhS-FF-SS-OCT) is used to investigate retinal vascular dynamics at unprecedented temporal resolution. The motion of retinal tissue that is induced by expansion of the vessels therein is measured with an accuracy of about 10 nm. The pulse shapes of arterial and venous pulsations, their temporal delays, as well as the frequency-dependent pulse propagation through the capillary bed, are determined. For the first time, imaging speed and motion sensitivity are sufficient for a direct measurement of pulse waves propagating with more than 600 mm/s in retinal vessels of a healthy young subject.},
   keywords = {Optical coherence tomography
Ophthalmology
Time-resolved imaging
Functional monitoring and imaging},
   DOI = {10.1364/OL.40.004771},
   url = {http://ol.osa.org/abstract.cfm?URI=ol-40-20-4771},
   year = {2015},
   type = {Journal Article}
}