1
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Dolling M, Buhl L, Birngruber R, Hüttmann G, Schulz-Hildebrandt H. Algorithm and software for field distortion correction in a commercial SD-OCT for corneal curvature assessment. Appl Opt 2024; 63:2694-2703. [PMID: 38568554 DOI: 10.1364/ao.505107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 03/12/2024] [Indexed: 04/05/2024]
Abstract
Accurate assessment of corneal curvatures using frequency domain optical coherence tomography (OCT) with galvanometer scanners remains challenging due to the well-known scan field distortion. This paper presents an algorithm and software for correcting the distortion using only two simple measurements in which a readily available standard sphere is positioned in different depths in front of the OCT scanner. This offers a highly accessible and easily reproducible method for the field distortion correction (FDC). The correction was validated by measuring different spherical phantoms and conducting corneal curvature measurements of ex vivo porcine corneas using a commercial spectral-domain OCT system and a clinically approved swept-source OCT as a reference instrument. Thus, the error in radius measurements of spherical phantoms was reduced by >90% and astigmatism by >80% using FDC. In explanted porcine eyes, the error in astigmatism measurements with the Telesto was reduced by 75% for power and 70% for angle. The best fitting sphere radius was determined up to a deviation of 0.4% from the Anterion. This paper describes a correction algorithm for OCT immanent distortion that is applicable to any scanning OCT setup and enables precise corneal curvature measurements. The MATLAB software for the FDC is publicly available on GitHub.
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2
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Singh AP, Göb M, Ahrens M, Eixmann T, Schulte B, Schulz-Hildebrandt H, Hüttmann G, Ellrichmann M, Huber R, Rahlves M. Virtual Hall sensor triggered multi-MHz endoscopic OCT imaging for stable real-time visualization. Opt Express 2024; 32:5809-5825. [PMID: 38439298 DOI: 10.1364/oe.514636] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 01/18/2024] [Indexed: 03/06/2024]
Abstract
Circumferential scanning in endoscopic imaging is crucial across various disciplines, and optical coherence tomography (OCT) is often the preferred choice due to its high-speed, high-resolution, and micron-scale imaging capabilities. Moreover, real-time and high-speed 3D endoscopy is a pivotal technology for medical screening and precise surgical guidance, among other applications. However, challenges such as image jitter and non-uniform rotational distortion (NURD) are persistent obstacles that hinder real-time visualization during high-speed OCT procedures. To address this issue, we developed an innovative, low-cost endoscope that employs a brushless DC motor for scanning, and a sensorless technique for triggering and synchronizing OCT imaging with the scanning motor. This sensorless approach uses the motor's electrical feedback (back electromotive force, BEMF) as a virtual Hall sensor to initiate OCT image acquisition and synchronize it with a Fourier Domain Mode-Locked (FDML)-based Megahertz OCT system. Notably, the implementation of BEMF-triggered OCT has led to a substantial reduction in image jitter and NURD (<4 mrad), thereby opening up a new window for real-time visualization capabilities. This approach suggests potential benefits across various applications, aiming to provide a more accurate, deployable, and cost-effective solution. Subsequent studies can explore the adaptability of this system to specific clinical scenarios and its performance under practical endoscopic conditions.
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3
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Pieper M, Schulz-Hildebrandt H, Schmudde I, Quell KM, Laumonnier Y, Hüttmann G, König P. Intravital imaging of mucus transport in asthmatic mice using microscopic optical coherence tomography. Am J Physiol Lung Cell Mol Physiol 2022; 323:L423-L430. [PMID: 35997279 PMCID: PMC9529266 DOI: 10.1152/ajplung.00455.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Asthma is one of the most common chronic diseases. Mucus overproduction is consistently linked to asthma morbidity and mortality. Despite the knowledge of the importance of mucus, little data exists on how mucus is transported in asthma and the immediate effects of therapeutic intervention. We therefore used microscopic optical coherence tomography (mOCT) to study spontaneous and induced mucus transport in an interleukin-13 (IL-13) induced asthma mouse model and examined the effects of isotonic (0.9% NaCl) and hypertonic saline (7% NaCl) which are used to induce mucus transport in cystic fibrosis. Without intervention, no bulk mucus transport was observed by mOCT and no intraluminal mucus was detectable in the intrapulmonary airways by histology. Administration of ATP-g-S induced mucus secretion into the airway lumen, but did not result in bulk mucus transport in the trachea. Intraluminal secreted immobile mucus could be mobilized by administration of isotonic or hypertonic saline but hypertonic saline mobilized mucus more reliably than isotonic saline. Irrespective of saline concentration, the mucus was transported in mucus chunks. In contrast to isotonic saline solution, hypertonic saline solution alone was able to induce mucus secretion. In conclusion, mOCT is suitable to examine the effects of mucus-mobilizing therapies in vivo. Although hypertonic saline was more efficient in inducing mucus transport, it induced mucus secretion, which might explain its limited benefit in asthma patients.
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Affiliation(s)
- Mario Pieper
- Institute of Anatomy, University of Lübeck, Lübeck, Germany.,Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany.,Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Inken Schmudde
- Institute of Anatomy, University of Lübeck, Lübeck, Germany.,Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany
| | - Katharina M Quell
- Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany.,Institute for Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
| | - Yves Laumonnier
- Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany.,Institute for Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
| | - Gereon Hüttmann
- Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany.,Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany.,Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Lübeck, Germany
| | - Peter König
- Institute of Anatomy, University of Lübeck, Lübeck, Germany.,Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany
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4
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Sieren M, Jaeckle S, Eixmann T, Schulz-Hildebrandt H, Preuss M, García-Vázquez V, Stahlberg E, Kleemann M, Barkhausen J, Goltz J, Horn M. Strahlenfreie Implantation eines thorakalen Aortenstentgrafts mittels faseroptischen und elektromagnetischen Trackings: Eine Phantomstudie. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M Sieren
- Universitätsklinikum Schleswig-Holstein, Klinik für Radiologie und Nuklearmedizin, Lübeck
| | - S Jaeckle
- Fraunhofer Institut für digitale Medizin MEVIS, Bremen/Lübeck
| | - T Eixmann
- Medizinisches Laserzentrum Lübeck gGmbH, Universität zu Lübeck, Lübeck
| | | | - M Preuss
- Universitäres Herz- und Gefäßzentrum, Universitätsklinikum Hamburg-Eppendorf, Hamburg
| | - V García-Vázquez
- Institut für Robotik und Kognitive Systeme, Universität zu Lübeck, Lübeck
| | - E Stahlberg
- Klinik für Radiologie Neuroradiologie, SANA Klinik Lübeck, Lübeck
| | - M Kleemann
- Klinik für Gefäß- und Endovaskuläre Chirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck
| | - J Barkhausen
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Schleswig-Holstein, Lübeck
| | - J Goltz
- Klinik für Radiologie und Neuroradiologie, SANA Klinik Lübeck, Lübeck
| | - M Horn
- Klinik für Gefäß- und Endovaskuläre Chirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck
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5
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Kohlfaerber T, Pieper M, Münter M, Holzhausen C, Ahrens M, Idel C, Bruchhage KL, Leichtle A, König P, Hüttmann G, Schulz-Hildebrandt H. Dynamic microscopic optical coherence tomography to visualize the morphological and functional micro-anatomy of the airways. Biomed Opt Express 2022; 13:3211-3223. [PMID: 35781952 PMCID: PMC9208592 DOI: 10.1364/boe.456104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/03/2022] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
In the imaging of airway tissue, optical coherence tomography (OCT) provides cross-sectional images of tissue structures, shows cilia movement and mucus secretion, but does not provide sufficient contrast to differentiate individual cells. By using fast sequences of microscopic resolution OCT (mOCT) images, OCT can use small signal fluctuations to overcome lack in contrast and speckle noise. In this way, OCT visualizes airway morphology on a cellular level and allows the tracking of the dynamic behavior of immune cells, as well as mucus transport and secretion. Here, we demonstrate that mOCT, by using temporal tissue fluctuation as contrast (dynamic mOCT), provides the possibility to study physiological and pathological tissue processes in vivo.
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Affiliation(s)
- Tabea Kohlfaerber
- Medizinisches Laserzentrum Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Mario Pieper
- University of Lübeck, Institute of Anatomy, Ratzeburger Allee 160, 23562 Lübeck, Germany
- Airway Research Center North Member of the German Center for Lung Research, DZL, 22927 Großhansdorf, Germany
| | - Michael Münter
- University of Lübeck, Institute of Biomedical Optics, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Cornelia Holzhausen
- University of Lübeck, Institute of Anatomy, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Martin Ahrens
- Airway Research Center North Member of the German Center for Lung Research, DZL, 22927 Großhansdorf, Germany
- University of Lübeck, Institute of Biomedical Optics, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Christian Idel
- University Hospital Schleswig-Holstein, ENT Clinics, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Karl-Ludwig Bruchhage
- University Hospital Schleswig-Holstein, ENT Clinics, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Anke Leichtle
- University Hospital Schleswig-Holstein, ENT Clinics, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Peter König
- University of Lübeck, Institute of Anatomy, Ratzeburger Allee 160, 23562 Lübeck, Germany
- Airway Research Center North Member of the German Center for Lung Research, DZL, 22927 Großhansdorf, Germany
| | - Gereon Hüttmann
- Medizinisches Laserzentrum Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- University of Lübeck, Institute of Anatomy, Ratzeburger Allee 160, 23562 Lübeck, Germany
- Airway Research Center North Member of the German Center for Lung Research, DZL, 22927 Großhansdorf, Germany
- Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Medizinisches Laserzentrum Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- University of Lübeck, Institute of Anatomy, Ratzeburger Allee 160, 23562 Lübeck, Germany
- Airway Research Center North Member of the German Center for Lung Research, DZL, 22927 Großhansdorf, Germany
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6
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Musial G, Kohlfaerber T, Ahrens M, Schulz-Hildebrandt H, Steven P, Hüttmann G. Dynamic Contrast Microscopic Optical Coherence Tomography As a Novel Method for Assessing Corneal Epithelium During Exposure to Benzalkonium Chloride. Transl Vis Sci Technol 2022; 11:28. [PMID: 35622381 PMCID: PMC9145126 DOI: 10.1167/tvst.11.5.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Microscopic optical coherence tomography (mOCT) has an imaging resolution of 1 µm in all voxel dimensions, but individual epithelial cells are difficult to resolve due to lack of scattering contrast. Adding dynamic contrast processing to mOCT (dmOCT) results in color images that enable visualization of individual cells and possibly give information on cellular function via the calculation of a motility coefficient. We propose this technique as a novel method of evaluating the ocular surface after exposure to a toxic chemical, benzalkonium chloride (BAK). Methods Ex vivo cross-section images were acquired with a custom-built, frequency-domain mOCT system. Eyes were explanted from healthy adult C57BL/6 mice and imaged every 30 minutes with five sets of dmOCT scans at each imaging time. Total epithelium and stroma thicknesses were measured from a single mOCT B-scan, and measures of color changes (hue) and the motility coefficient were acquired from dmOCT scans. Results After 30-minute exposures to 0.005% BAK, local motility decreased and total epithelium thickness increased compared to controls. For basal epithelium cells, local motility decreased after 60-minute exposures, and the hue shifted red after 90-minute exposures. Stroma thickness did not significantly swell until 150-minute exposures to BAK. Conclusions dmOCT allows us to view the behavior of the cornea epithelium under toxic stress due to BAK, revealing parallel swelling of the extracellular matrix and changes in local subcellular motion. Translational Relevance The evaluation of the cornea epithelium using dmOCT is helpful to our understanding of the toxic effects of BAK.
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Affiliation(s)
- Gwen Musial
- University Hospital Cologne, Cologne, Germany
| | | | - Martin Ahrens
- Institute of Biomedial Optics, University of Lübeck, Lübeck, Germany
| | | | | | - Gereon Hüttmann
- Institute of Biomedial Optics, University of Lübeck, Lübeck, Germany.,Airway Research Center North Member of the German Center for Lung Research, DZL, 22927 Großhansdorf, Germany.,Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Lübeck, Germany
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7
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Sieren MM, Jäckle S, Eixmann T, Schulz-Hildebrandt H, Matysiak F, Preuss M, García-Vázquez V, Stahlberg E, Kleemann M, Barkhausen J, Goltz J, Horn M. Radiation-free Thoracic Endovascular Aneurysm Repair with Fiberoptic and Electromagnetic Guidance:A Phantom Study. J Vasc Interv Radiol 2021; 33:384-391.e7. [PMID: 34958860 DOI: 10.1016/j.jvir.2021.12.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the feasibility and accuracy of a radiation-free implantation of a thoracic aortic stent-graft employing fiberoptic and electromagnetic tracking in an anthropomorphic phantom. MATERIALS AND METHODS An anthropomorphic phantom was manufactured based on computed tomography angiography (CTA) data from a patient. An aortic stent-graft application system was equipped with a fiber Bragg gratings fiber and three electromagnetic sensors. The stent-graft was navigated in the phantom by three interventionalists using the tracking data generated by both technologies. One implantation procedure was performed. The technical success of the procedure was evaluated using digital subtraction angiography and pre- and post-interventional CTA. Tracking accuracy was determined at various anatomical landmarks based on separately acquired fluoroscopic images. The mean/maximum errors were measured for the stent-graft application system and the tip/end of the stent-graft. RESULTS The procedure resulted in technical success with a mean error below 3 mm for the entire application system and <2 mm for the position of the tip of the stent-graft. Navigation/implantation and handling of the device were rated sufficiently accurate and on a par with comparable, routinely used stent-graft application systems. CONCLUSION Our study demonstrates successful stent-graft implantation during a thoracic endovascular aortic repair procedure employing advanced guidance techniques and avoiding fluoroscopic imaging. This is an essential step in facilitating the implantation of stent-grafts and reducing the health risks associated with ionizing radiation during endovascular procedures.
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Affiliation(s)
- Malte Maria Sieren
- Department of Radiology and Nuclear Medicine, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany.
| | - Sonja Jäckle
- Fraunhofer Institute for Digital Medicine MEVIS, Maria-Goeppert Straße 2, 23562 Lübeck, Germany
| | - Tim Eixmann
- Medical Laser Center Lübeck, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | | | - Florian Matysiak
- Department of Vascular Surgery, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Mark Preuss
- Department of Vascular Surgery, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Verónica García-Vázquez
- Institute for Robotics and Cognitive Systems, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany, Lübeck, Germany
| | - Erik Stahlberg
- Department of Radiology and Nuclear Medicine, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Markus Kleemann
- Department of Vascular Surgery, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Jörg Barkhausen
- Department of Radiology and Nuclear Medicine, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Jan Goltz
- Department of Radiology and Neuroradiology, Sana Hospital, Kronsforder Allee 71-73, 23560 Lübeck, Germany
| | - Marco Horn
- Department of Vascular Surgery, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
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8
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Cereda MG, Parrulli S, Douven Y, Faridpooya K, van Romunde S, Hüttmann G, Eixmann T, Schulz-Hildebrandt H, Kronreif G, Beelen M, de Smet MD. Clinical Evaluation of an Instrument-Integrated OCT-Based Distance Sensor for Robotic Vitreoretinal Surgery. Ophthalmol Sci 2021; 1:100085. [PMID: 36246942 PMCID: PMC9560530 DOI: 10.1016/j.xops.2021.100085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 10/11/2021] [Accepted: 11/08/2021] [Indexed: 04/29/2023]
Abstract
PURPOSE To assess the efficacy of an instrument-integrated OCT (iiOCT)-based distance sensor during robotic vitreoretinal surgery using the Preceyes Surgical System (PSS; Preceyes B.V.). DESIGN Single-center interventional study. PARTICIPANTS Patients requiring vitreoretinal surgery. METHODS Five patients were enrolled. Standard preoperative OCT images were obtained. After vitrectomy, a predefined set of actions was performed using the iiOCT-based sensor. Images then were processed to assess the signal-to-noise ratio (SNR) at various angles to the retina and at different distances between the instrument tip and the retinal surface. Preoperative and intraoperative OCT images were compared qualitatively and quantitatively. MAIN OUTCOMES MEASURES The feasibility in performing surgical tasks using the iiOCT-based sensor during vitreoretinal surgery, the SNR when imaging the retina, differences among intraoperative and preoperative OCT images, and characteristics of intraoperative retinal movements detected with the iiOCT-based probe. RESULTS Surgeons were able to perform all the tasks but one. The PSS was able to maintain a fixed distance. The SNR of the iiOCT-based sensor signal was adequate to determine the distance to the retina and to control the PSS. Analysis of iiOCT-based sensor A-scans identified 3 clearly distinguishable retinal layers, including the inner retinal boundary and the interface at the retinal pigment epithelium-Bruch's membrane. Thickness values differed by less than 5% from that measured by preoperative OCT, indicating its accuracy. The Fourier analysis of iiOCT-based sensor recordings identified anteroposterior retinal movements attributed to heartbeat and respiration. CONCLUSIONS This iiOCT-based sensor was tested successfully and promises reliable use during robot-assisted surgery. An iiOCT-based sensor is a promising step toward OCT-guided robotic retinal surgery.
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Affiliation(s)
- Matteo Giuseppe Cereda
- Eye Clinic, Department of Biomedical and Clinical Science “Luigi Sacco,” Sacco Hospital, University of Milan, Milan, Italy
| | - Salvatore Parrulli
- Eye Clinic, Department of Biomedical and Clinical Science “Luigi Sacco,” Sacco Hospital, University of Milan, Milan, Italy
- Correspondence: Salvatore Parrulli, MD, Eye Clinic, Department of Biomedical and Clinical Science “Luigi Sacco,” Sacco Hospital, University of Milan, via G.B. Grassi 74, Milan, 20157, Italy.
| | - Y.G.M. Douven
- Department of Mechanical Engineering, University of Technology, Eindhoven, The Netherlands
| | | | | | - Gereon Hüttmann
- Medical Laser Center Lübeck GmbH, Lübeck, Germany
- Airway Research Center North, Member of the German Center for Lung Research (DZL), Grosshansdorf, Germany
| | - Tim Eixmann
- Medical Laser Center Lübeck GmbH, Lübeck, Germany
| | | | | | | | - Marc D. de Smet
- Preceyes B.V., Eindhoven, The Netherlands
- MIOS sa, Lausanne, Switzerland
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9
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Münter M, Pieper M, Kohlfaerber T, Bodenstorfer E, Ahrens M, Winter C, Huber R, König P, Hüttmann G, Schulz-Hildebrandt H. Microscopic optical coherence tomography (mOCT) at 600 kHz for 4D volumetric imaging and dynamic contrast. Biomed Opt Express 2021; 12:6024-6039. [PMID: 34745719 PMCID: PMC8547980 DOI: 10.1364/boe.425001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 05/11/2023]
Abstract
Volumetric imaging of dynamic processes with microscopic resolution holds a huge potential in biomedical research and clinical diagnosis. Using supercontinuum light sources and high numerical aperture (NA) objectives, optical coherence tomography (OCT) achieves microscopic resolution and is well suited for imaging cellular and subcellular structures of biological tissues. Currently, the imaging speed of microscopic OCT (mOCT) is limited by the line-scan rate of the spectrometer camera and ranges from 30 to 250 kHz. This is not fast enough for volumetric imaging of dynamic processes in vivo and limits endoscopic application. Using a novel CMOS camera, we demonstrate fast 3-dimensional OCT imaging with 600,000 A-scans/s at 1.8 µm axial and 1.1 µm lateral resolution. The improved speed is used for imaging of ciliary motion and particle transport in ex vivo mouse trachea. Furthermore, we demonstrate dynamic contrast OCT by evaluating the recorded volumes rather than en face planes or B-scans. High-speed volumetric mOCT will enable the correction of global tissue motion and is a prerequisite for applying dynamic contrast mOCT in vivo. With further increase in imaging speed and integration in flexible endoscopes, volumetric mOCT may be used to complement or partly replace biopsies.
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Affiliation(s)
- Michael Münter
- University of Lübeck,
Institute of Biomedical Optics,
Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Medizinisches Laserzentrum
Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Mario Pieper
- University of
Lübeck, Institute of Anatomy, Ratzeburger Allee 160,
23562 Lübeck, Germany
- Airway Research Center North
Member of the German Center for Lung Research, DZL,
22927 Großhansdorf, Germany
| | - Tabea Kohlfaerber
- Medizinisches Laserzentrum
Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Ernst Bodenstorfer
- Austrian Institute of
Technology GmbH, Giefinggasse 4, 1210 Vienna, Austria
| | - Martin Ahrens
- University of Lübeck,
Institute of Biomedical Optics,
Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Airway Research Center North
Member of the German Center for Lung Research, DZL,
22927 Großhansdorf, Germany
| | | | - Robert Huber
- University of Lübeck,
Institute of Biomedical Optics,
Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Peter König
- University of
Lübeck, Institute of Anatomy, Ratzeburger Allee 160,
23562 Lübeck, Germany
- Airway Research Center North
Member of the German Center for Lung Research, DZL,
22927 Großhansdorf, Germany
| | - Gereon Hüttmann
- University of Lübeck,
Institute of Biomedical Optics,
Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Medizinisches Laserzentrum
Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Airway Research Center North
Member of the German Center for Lung Research, DZL,
22927 Großhansdorf, Germany
| | - Hinnerk Schulz-Hildebrandt
- University of Lübeck,
Institute of Biomedical Optics,
Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Medizinisches Laserzentrum
Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Airway Research Center North
Member of the German Center for Lung Research, DZL,
22927 Großhansdorf, Germany
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10
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Jäckle S, Lange A, García-Vázquez V, Eixmann T, Matysiak F, Sieren MM, Horn M, Schulz-Hildebrandt H, Hüttmann G, Ernst F, Heldmann S, Pätz T, Preusser T. Instrument localisation for endovascular aneurysm repair: Comparison of two methods based on tracking systems or using imaging. Int J Med Robot 2021; 17:e2327. [PMID: 34480406 DOI: 10.1002/rcs.2327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 08/23/2021] [Accepted: 08/30/2021] [Indexed: 11/11/2022]
Abstract
BACKGROUND In endovascular aneuysm repair (EVAR) procedures, medical instruments are currently navigated with a two-dimensional imaging based guidance requiring X-rays and contrast agent. METHODS Novel approaches for obtaining the three-dimensional instrument positions are introduced. Firstly, a method based on fibre optical shape sensing, one electromagnetic sensor and a preoperative computed tomography (CT) scan is described. Secondly, an approach based on image processing using one 2D fluoroscopic image and a preoperative CT scan is introduced. RESULTS For the tracking based method, average errors from 1.81 to 3.13 mm and maximum errors from 3.21 to 5.46 mm were measured. For the image-based approach, average errors from 3.07 to 6.02 mm and maximum errors from 8.05 to 15.75 mm were measured. CONCLUSION The tracking based method is promising for usage in EVAR procedures. For the image-based approach are applications in smaller vessels more suitable, since its errors increase with the vessel diameter.
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Affiliation(s)
- Sonja Jäckle
- Fraunhofer Institute for Digital Medicine MEVIS, Lübeck, Germany
| | - Annkristin Lange
- Fraunhofer Institute for Digital Medicine MEVIS, Lübeck, Germany
| | | | - Tim Eixmann
- Institute for Biomedical Optics, Universität zu Lübeck, Lübeck, Germany
| | - Florian Matysiak
- Department of Surgery, University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Malte Maria Sieren
- Department for Radiology and Nuclear Medicine, University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Marco Horn
- Department of Surgery, University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Institute for Biomedical Optics, Universität zu Lübeck, Lübeck, Germany.,Medical Laser Center Lübeck GmbH, Lübeck, Germany.,German Center for Lung Research (DZL), Airway Research Center North, Großhansdorf, Germany
| | - Gereon Hüttmann
- Institute for Biomedical Optics, Universität zu Lübeck, Lübeck, Germany.,Medical Laser Center Lübeck GmbH, Lübeck, Germany.,German Center for Lung Research (DZL), Airway Research Center North, Großhansdorf, Germany
| | - Floris Ernst
- Institute for Robotics and Cognitive Systems, Universität zu Lübeck, Lübeck, Germany
| | - Stefan Heldmann
- Fraunhofer Institute for Digital Medicine MEVIS, Lübeck, Germany
| | - Torben Pätz
- Fraunhofer Institute for Digital Medicine MEVIS, Bremen, Germany
| | - Tobias Preusser
- Fraunhofer Institute for Digital Medicine MEVIS, Bremen, Germany.,Jacobs University, Bremen, Germany
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11
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Jäckle S, Eixmann T, Matysiak F, Sieren MM, Horn M, Schulz-Hildebrandt H, Hüttmann G, Pätz T. 3D Stent Graft Guidance based on Tracking Systems for Endovascular Aneurysm Repair. Current Directions in Biomedical Engineering 2021. [DOI: 10.1515/cdbme-2021-1004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
In endovascular aneurysm repair (EVAR) procedures, the stent graft navigation and implantation is currently performed under a two-dimensional (2D) imaging based guidance requiring X-rays and contrast agent. In this work, a novel 3D stent graft guidance approach based on tracking systems is introduced. A calibration method and the visualization of the stent graft guidance are described. The tracking based stent graft guidance is evaluated by conducting an EVAR procedure on a torso phantom using a stent graft system equipped with an optical fiber and three EM sensors. The physicians were able to navigate the stent graft to the landing zone, and to place and implant it as intended using the introduced guidance. This showed that the application of the stent graft guidance is feasible in a clinical environment and promising for the reduction of radiation and contrast agent.
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Affiliation(s)
- Sonja Jäckle
- Fraunhofer Institute for Digital Medicine MEVIS, Maria-Goeppert-Straße 3, 23562 Lübeck , Germany
| | - Tim Eixmann
- Institute for Biomedical Optics, University of Lübeck, Lübeck , Germany
| | - Florian Matysiak
- Division of Vascular- and Endovascular Surgery, Department of Surgery, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck , Germany
| | - Malte Maria Sieren
- Department for Radiology and Nuclear Medicine, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck , Germany
| | - Marco Horn
- Division of Vascular- and Endovascular Surgery, Department of Surgery, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck , Germany
| | - Hinnerk Schulz-Hildebrandt
- Institute for Biomedical Optics, University of Lübeck, Lübeck, Germany Medical Laser Center Lübeck GmbH, Lübeck , Germany
- German Center for Lung Research (DZL), Airway Research Center North, Großhansdorf , Germany
| | - Gereon Hüttmann
- Institute for Biomedical Optics, University of Lübeck, Lübeck, Germany German Center for Lung Research (DZL), Airway Research Center North, Großhansdorf , Germany
- Medical Laser Center Lübeck GmbH, Lübeck , Germany
| | - Torben Pätz
- Fraunhofer Institute for Digital Medicine MEVIS, Bremen , Germany
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12
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Schneider H, Ahrens M, Strumpski M, Rüger C, Häfer M, Hüttmann G, Theisen-Kunde D, Schulz-Hildebrandt H, Haak R. An Intraoral OCT Probe to Enhanced Detection of Approximal Carious Lesions and Assessment of Restorations. J Clin Med 2020; 9:jcm9103257. [PMID: 33053724 PMCID: PMC7600310 DOI: 10.3390/jcm9103257] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/02/2020] [Accepted: 10/05/2020] [Indexed: 12/18/2022] Open
Abstract
Caries, the world's most common chronic disease, remains a major cause of invasive restorative dental treatment. To take advantage of the diagnostic potential of optical coherence tomography (OCT) in contemporary dental prevention and treatment, an intraorally applicable spectral-domain OCT probe has been developed based on an OCT hand-held scanner equipped with a rigid 90°-optics endoscope. The probe was verified in vitro. In vivo, all tooth surfaces could be imaged with the OCT probe, except the vestibular surfaces of third molars and the proximal surface sections of molars within a "blind spot" at a distance greater than 2.5 mm from the tooth surface. Proximal surfaces of 64 posterior teeth of four volunteers were assessed by intraoral OCT, visual-tactile inspection, bitewing radiography and fiber-optic transillumination. The agreement in detecting healthy and carious surfaces varied greatly between OCT and established methods (18.2-94.7%), whereby the established methods could always be supplemented by OCT. Direct and indirect composite and ceramic restorations with inherent imperfections and failures of the tooth-restoration bond were imaged and qualitatively evaluated. The intraoral OCT probe proved to be a powerful technological approach for the non-invasive imaging of healthy and carious hard tooth tissues and gingiva as well as tooth-colored restorations.
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Affiliation(s)
- Hartmut Schneider
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
- Correspondence: ; Tel.: +49-341-97-212-63; Fax: +49-341-97-212-19
| | - Martin Ahrens
- Institut für Biomedizinische Optik, Universität zu Lübeck, 23562 Lübeck, Germany; (M.A.); (G.H.); (H.S.-H.)
- Medizinisches Laserzentrum Lübeck GmbH, 23562 Lübeck, Germany;
| | - Michaela Strumpski
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
| | - Claudia Rüger
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
| | - Matthias Häfer
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
| | - Gereon Hüttmann
- Institut für Biomedizinische Optik, Universität zu Lübeck, 23562 Lübeck, Germany; (M.A.); (G.H.); (H.S.-H.)
- Medizinisches Laserzentrum Lübeck GmbH, 23562 Lübeck, Germany;
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 23562 Lübeck, Germany
| | | | - Hinnerk Schulz-Hildebrandt
- Institut für Biomedizinische Optik, Universität zu Lübeck, 23562 Lübeck, Germany; (M.A.); (G.H.); (H.S.-H.)
- Medizinisches Laserzentrum Lübeck GmbH, 23562 Lübeck, Germany;
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 23562 Lübeck, Germany
| | - Rainer Haak
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
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13
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Münter M, Vom Endt M, Pieper M, Casper M, Ahrens M, Kohlfaerber T, Rahmanzadeh R, König P, Hüttmann G, Schulz-Hildebrandt H. Dynamic contrast in scanning microscopic OCT. Opt Lett 2020; 45:4766-4769. [PMID: 32870852 DOI: 10.1364/ol.396134] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/07/2020] [Indexed: 05/18/2023]
Abstract
While optical coherence tomography (OCT) provides a resolution down to 1 µm, it has difficulties in visualizing cellular structures due to a lack of scattering contrast. By evaluating signal fluctuations, a significant contrast enhancement was demonstrated using time-domain full-field OCT (FF-OCT), which makes cellular and subcellular structures visible. The putative cause of the dynamic OCT signal is the site-dependent active motion of cellular structures in a sub-micrometer range, which provides histology-like contrast. Here we demonstrate dynamic contrast with a scanning frequency-domain OCT (FD-OCT), which we believe has crucial advantages. Given the inherent sectional imaging geometry, scanning FD-OCT provides depth-resolved images across tissue layers, a perspective known from histopathology, much faster and more efficiently than FF-OCT. Both shorter acquisition times and tomographic depth-sectioning reduce the sensitivity of dynamic contrast for bulk tissue motion artifacts and simplify their correction in post-processing. Dynamic contrast makes microscopic FD-OCT a promising tool for the histological analysis of unstained tissues.
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14
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Jäckle S, García-Vázquez V, Eixmann T, Matysiak F, von Haxthausen F, Sieren MM, Schulz-Hildebrandt H, Hüttmann G, Ernst F, Kleemann M, Pätz T. Three-dimensional guidance including shape sensing of a stentgraft system for endovascular aneurysm repair. Int J Comput Assist Radiol Surg 2020; 15:1033-1042. [PMID: 32383105 PMCID: PMC7303070 DOI: 10.1007/s11548-020-02167-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 04/06/2020] [Indexed: 11/04/2022]
Abstract
PURPOSE During endovascular aneurysm repair (EVAR) procedures, medical instruments are guided with two-dimensional (2D) fluoroscopy and conventional digital subtraction angiography. However, this requires X-ray exposure and contrast agent is used, and the depth information is missing. To overcome these drawbacks, a three-dimensional (3D) guidance approach based on tracking systems is introduced and evaluated. METHODS A multicore fiber with fiber Bragg gratings for shape sensing and three electromagnetic (EM) sensors for locating the shape were integrated into a stentgraft system. A model for obtaining the located shape of the first 38 cm of the stentgraft system with two EM sensors is introduced and compared with a method based on three EM sensors. Both methods were evaluated with a vessel phantom containing a 3D-printed vessel made of silicone and agar-agar simulating the surrounding tissue. RESULTS The evaluation of the guidance methods resulted in average errors from 1.35 to 2.43 mm and maximum errors from 3.04 to 6.30 mm using three EM sensors, and average errors from 1.57 to 2.64 mm and maximum errors from 2.79 to 6.27 mm using two EM sensors. Moreover, the videos made from the continuous measurements showed that a real-time guidance is possible with both approaches. CONCLUSION The results showed that an accurate real-time guidance with two and three EM sensors is possible and that two EM sensors are already sufficient. Thus, the introduced 3D guidance method is promising to use it as navigation tool in EVAR procedures. Future work will focus on developing a method with less EM sensors and a detailed latency evaluation of the guidance method.
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Affiliation(s)
- Sonja Jäckle
- Fraunhofer MEVIS, Institute for Digital Medicine, Maria-Goeppert-Straße 3, 23562, Lübeck, Germany.
| | - Verónica García-Vázquez
- Institute for Robotics and Cognitive Systems, Universität zu Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Tim Eixmann
- Institute of Biomedical Optics, Universität zu Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Florian Matysiak
- Division of Vascular- and Endovascular Surgery, Department of Surgery, University Hospital Schleswig-Holstein, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Felix von Haxthausen
- Institute for Robotics and Cognitive Systems, Universität zu Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Malte Maria Sieren
- Department for Radiology and Nuclear Medicine, University Hospital Schleswig-Holstein, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Institute of Biomedical Optics, Universität zu Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
- German Center for Lung Research (DZL) , Airway Research Center North, Wöhrendamm 80, 22927, Großhansdorf, Germany
| | - Gereon Hüttmann
- Institute of Biomedical Optics, Universität zu Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
- German Center for Lung Research (DZL) , Airway Research Center North, Wöhrendamm 80, 22927, Großhansdorf, Germany
| | - Floris Ernst
- Institute for Robotics and Cognitive Systems, Universität zu Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Markus Kleemann
- Division of Vascular- and Endovascular Surgery, Department of Surgery, University Hospital Schleswig-Holstein, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Torben Pätz
- Fraunhofer MEVIS, Institute for Digital Medicine, Am Fallturm 1, 28359, Bremen, Germany
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15
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Wertheimer CM, Brandt K, Kaminsky S, Elhardt C, Kassumeh SA, Pham L, Schulz-Hildebrandt H, Priglinger S, Anderson RR, Birngruber R. Refractive Changes After Corneal Stromal Filler Injection for the Correction of Hyperopia. J Refract Surg 2020; 36:406-413. [DOI: 10.3928/1081597x-20200429-01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 04/29/2020] [Indexed: 11/20/2022]
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16
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Rakhymzhan A, Reuter L, Raspe R, Bremer D, Günther R, Leben R, Heidelin J, Andresen V, Cheremukhin S, Schulz-Hildebrandt H, Bixel MG, Adams RH, Radbruch H, Hüttmann G, Hauser AE, Niesner RA. Coregistered Spectral Optical Coherence Tomography and Two-Photon Microscopy for Multimodal Near-Instantaneous Deep-Tissue Imaging. Cytometry A 2020; 97:515-527. [PMID: 32293804 DOI: 10.1002/cyto.a.24012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 12/23/2022]
Abstract
Two-photon microscopy (2PM) has brought unique insight into the mechanisms underlying immune system dynamics and function since it enables monitoring of cellular motility and communication in complex systems within their genuine environment-the living organism. However, use of 2PM in clinical settings is limited. In contrast, optical coherence tomography (OCT), a noninvasive label-free diagnostic imaging method, which allows monitoring morphologic changes of large tissue regions in vivo, has found broad application in the clinic. Here we developed a combined multimodal technology to achieve near-instantaneous coregistered OCT, 2PM, and second harmonic generation (SHG) imaging over large volumes (up to 1,000 × 1,000 × 300 μm3 ) of tendons and other tissue compartments in mouse paws, as well as in mouse lymph nodes, spleens, and femurs. Using our multimodal imaging approach, we found differences in macrophage cell shape and motility behavior depending on whether they are located in tendons or in the surrounding tissue compartments of the mouse paw. The cellular shape of tissue-resident macrophages, indicative for their role in tissue, correlated with the supramolecular organization of collagen as revealed by SHG and OCT. Hence, the here-presented approach of coregistered OCT and 2PM has the potential to link specific cellular phenotypes and functions (as revealed by 2PM) to tissue morphology (as highlighted by OCT) and thus, to build a bridge between basic research knowledge and clinical observations. © 2020 The Authors. Cytometry Part A published by Wiley Periodicals, Inc. on behalf of International Society for Advancement of Cytometry.
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Affiliation(s)
- Asylkhan Rakhymzhan
- Biophysical Analytics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany
| | - Lucie Reuter
- Biophysical Analytics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany
| | - Raphael Raspe
- Immundynamics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany.,Immundynamics and Intravital Microscopy, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Daniel Bremer
- Biophysical Analytics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany
| | - Robert Günther
- Biophysical Analytics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany.,Immundynamics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany
| | - Ruth Leben
- Biophysical Analytics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany
| | - Judith Heidelin
- LaVision BioTec-A Miltenyi Biotec Company, Bielefeld, Germany
| | - Volker Andresen
- LaVision BioTec-A Miltenyi Biotec Company, Bielefeld, Germany
| | | | | | - Maria G Bixel
- Max-Plank-Institut for Molecular Biomedicine, Tissue Morphogenesis, Münster, Germany
| | - Ralf H Adams
- Max-Plank-Institut for Molecular Biomedicine, Tissue Morphogenesis, Münster, Germany
| | - Helena Radbruch
- Institute for Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Gereon Hüttmann
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Lübeck, Germany
| | - Anja E Hauser
- Immundynamics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany.,Immundynamics and Intravital Microscopy, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Raluca A Niesner
- Biophysical Analytics, Deutsches Rheumaforschungszentrum (DRFZ), Berlin, Germany.,Dynamic and Functional in vivo Imaging, Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
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17
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Pieper M, Schulz-Hildebrandt H, Mall MA, Hüttmann G, König P. Intravital microscopic optical coherence tomography imaging to assess mucus-mobilizing interventions for muco-obstructive lung disease in mice. Am J Physiol Lung Cell Mol Physiol 2020; 318:L518-L524. [PMID: 31994896 PMCID: PMC7093113 DOI: 10.1152/ajplung.00287.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Airway mucus obstruction is a hallmark of chronic lung diseases such as cystic fibrosis, asthma, and COPD, and the development of more effective mucus-mobilizing therapies remains an important unmet need for patients with these muco-obstructive lung diseases. However, methods for sensitive visualization and quantitative assessment of immediate effects of therapeutic interventions on mucus clearance in vivo are lacking. In this study, we determined whether newly developed high-speed microscopic optical coherence tomography (mOCT) is sensitive to detect and compare in vivo effects of inhaled isotonic saline, hypertonic saline, and bicarbonate on mucus mobilization and clearance in Scnn1b-transgenic mice with muco-obstructive lung disease. In vivo mOCT imaging showed that inhaled isotonic saline-induced rapid mobilization of mucus that was mainly transported as chunks from the lower airways of Scnn1b-transgenic mice. Hypertonic saline mobilized a significantly greater amount of mucus that showed a more uniform distribution compared with isotonic saline. The addition of bicarbonate-to-isotonic saline had no effect on mucus mobilization, but also led to a more uniform mucus layer compared with treatment with isotonic saline alone. mOCT can detect differences in response to mucus-mobilizing interventions in vivo, and may thus support the development of more effective therapies for patients with muco-obstructive lung diseases.
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Affiliation(s)
- Mario Pieper
- Institute of Anatomy, University of Lübeck, Lübeck, Germany.,Airway Research Center North, German Center for Lung Research, Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Airway Research Center North, German Center for Lung Research, Lübeck, Germany.,Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Marcus A Mall
- Department of Translational Pulmonology, Translational Lung Research Center Heidelberg, German Center for Lung Research, University of Heidelberg, Heidelberg, Germany.,Department of Pediatric Pulmonology, Immunology and Intensive Care Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Gereon Hüttmann
- Airway Research Center North, German Center for Lung Research, Lübeck, Germany.,Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Peter König
- Institute of Anatomy, University of Lübeck, Lübeck, Germany.,Airway Research Center North, German Center for Lung Research, Lübeck, Germany
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18
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Horn M, Jäckle S, von Haxthausen F, Eixmann T, Schulz-Hildebrandt H, Hüttmann G, Bouchagiar J, Matysiak F, Kaschwich M, Kleemann M, Ernst F, García-Vázquez V, Pätz T. First Steps into Catheter Guidance Including Shape Sensing for Endovascular Aneurysm Repair Procedures. Eur J Vasc Endovasc Surg 2019. [DOI: 10.1016/j.ejvs.2019.09.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Casper MJ, Glahn J, Evers M, Schulz-Hildebrandt H, Kositratna G, Birngruber R, Hüttmann G, Manstein D. Capillary Refill-The Key to Assessing Dermal Capillary Capacity and Pathology in Optical Coherence Tomography Angiography. Lasers Surg Med 2019; 52:653-658. [PMID: 31755127 PMCID: PMC7496142 DOI: 10.1002/lsm.23188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/05/2019] [Indexed: 12/12/2022]
Abstract
Background/Objectives Standard optical coherence tomography angiography (OCTA) has been limited to imaging blood vessels actively undergoing perfusion, providing a temporary picture of surface microvasculature. Capillary perfusion in the skin is dynamic and changes in response to the surrounding tissue's respiratory, nutritional, and thermoregulatory needs. Hence, OCTA often represents a given perfusion state without depicting the actual extent of the vascular network. Here we present a method for obtaining a more accurate anatomic representation of the surface capillary network in human skin using OCTA, along with proposing a new parameter, the Relative Capillary Capacity (RCC), a quantifiable proxy for assessing capillary dilation potential and permeability. Methods OCTA images were captured at baseline and after compression of the skin. Baseline images display ambient capillary perfusion, while images taken upon capillary refill display the network of existing capillaries at full capacity. An optimization‐based automated vessel segmentation method was used to automatically analyze and compare OCTA image sequences obtained from two volunteers. RCC was then compared with visual impressions of capillary viability. Results Our OCTA imaging sequence provides a method for mapping cutaneous capillary networks independent of ambient perfusion. Differences between baseline and refill images clearly demonstrate the shortcomings of standard OCTA imaging and produce the RCC biometric as a quantifiable proxy for assessing capillary dilation potential and permeability. Conclusion Future dermatological OCTA diagnostic studies should implement the Capillary Refill Methods over standard imaging techniques and further explore the relevance of RCC to differential diagnosis and dermatopathology. Lasers Surg. Med. © The Authors. Lasers in Surgery and Medicine published by Wiley Periodicals, Inc.
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Affiliation(s)
- M J Casper
- Harvard Medical School, Cutaneous Biology Research Center, Massachusetts General Hospital, 149 13th Street, Boston, Massachusetts, 02129.,Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany
| | - J Glahn
- Harvard Medical School, Cutaneous Biology Research Center, Massachusetts General Hospital, 149 13th Street, Boston, Massachusetts, 02129
| | - M Evers
- Harvard Medical School, Cutaneous Biology Research Center, Massachusetts General Hospital, 149 13th Street, Boston, Massachusetts, 02129.,Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany
| | - H Schulz-Hildebrandt
- Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany.,Medical Laser Center Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany
| | - G Kositratna
- Harvard Medical School, Cutaneous Biology Research Center, Massachusetts General Hospital, 149 13th Street, Boston, Massachusetts, 02129
| | - R Birngruber
- Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany.,Medical Laser Center Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany.,Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts, 02114
| | - G Hüttmann
- Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany.,Medical Laser Center Lübeck, Peter-Monnik-Weg 4, Lübeck, 23562, Germany.,Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Gießen, Germany
| | - D Manstein
- Harvard Medical School, Cutaneous Biology Research Center, Massachusetts General Hospital, 149 13th Street, Boston, Massachusetts, 02129
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20
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Jäckle S, Eixmann T, Schulz-Hildebrandt H, Hüttmann G, Pätz T. Fiber optical shape sensing of flexible instruments for endovascular navigation. Int J Comput Assist Radiol Surg 2019; 14:2137-2145. [PMID: 31493113 PMCID: PMC6858473 DOI: 10.1007/s11548-019-02059-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 08/21/2019] [Indexed: 11/27/2022]
Abstract
Purpose Endovascular aortic repair procedures are currently conducted with 2D fluoroscopy imaging. Tracking systems based on fiber Bragg gratings are an emerging technology for the navigation of minimally invasive instruments which can reduce the X-ray exposure and the used contrast agent. Shape sensing of flexible structures is challenging and includes many calculations steps which are prone to different errors. To reduce this errors, we present an optimized shape sensing model. Methods We analyzed for every step of the shape sensing process, which errors can occur, how the error affects the shape and how it can be compensated or minimized. Experiments were done with one multicore fiber system with 38 cm sensing length, and the effects of different methods and parameters were analyzed. Furthermore, we compared 3D shape reconstructions with the segmented shape of the corresponding CT scans of the fiber to evaluate the accuracy of our optimized shape sensing model. Finally, we tested our model in a realistic endovascular scenario by using a 3D printed vessel system created from patient data. Results Depending on the complexity of the shape, we reached an average error of 0.35–1.15 mm and maximal error of 0.75–7.53 mm over the whole 38 cm sensing length. In the endovascular scenario, we obtained an average and maximal error of 1.13 mm and 2.11 mm, respectively. Conclusion The accuracies of the 3D shape sensing model are promising, and we plan to combine the shape sensing based on fiber Bragg gratings with the position and orientation of an electromagnetic tracking to obtain the located catheter shape. Electronic supplementary material The online version of this article (10.1007/s11548-019-02059-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sonja Jäckle
- Fraunhofer MEVIS, Institute for Digital Medicine, Lübeck, Maria-Goeppert-Straße 3, 23562, Lübeck, Germany.
| | - Tim Eixmann
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
- Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
- German Center for Lung Research, DZL, Airways Research Center North, 22927, Großhansdorf, Germany
| | - Gereon Hüttmann
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
- Institute of Biomedical Optics, Universität zu Lübeck, Peter-Monnik-Weg 4, 23562, Lübeck, Germany
- German Center for Lung Research, DZL, Airways Research Center North, 22927, Großhansdorf, Germany
| | - Torben Pätz
- Fraunhofer MEVIS, Institute for Digital Medicine, Bremen, Am Fallturm 1, 28359, Bremen, Germany
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Casper M, Schulz-Hildebrandt H, Evers M, Birngruber R, Manstein D, Hüttmann G. Optimization-based vessel segmentation pipeline for robust quantification of capillary networks in skin with optical coherence tomography angiography. J Biomed Opt 2019; 24:1-11. [PMID: 31041858 PMCID: PMC6990060 DOI: 10.1117/1.jbo.24.4.046005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
Optical coherence tomography angiography (OCTA) provides in-vivo images of microvascular perfusion in high resolution. For its application to basic and clinical research, an automatic and robust quantification of the capillary architecture is mandatory. Only this makes it possible to reliably analyze large amounts of image data, to establish biomarkers, and to monitor disease developments. However, due to its optical properties, OCTA images of skin often suffer from a poor signal-to-noise ratio and contain imaging artifacts. Previous work on automatic vessel segmentation in OCTA mostly focuses on retinal and cerebral vasculature. Its applicability to skin and, furthermore, its robustness against imaging artifacts had not been systematically evaluated. We propose a segmentation method that improves the quality of vascular quantification in OCTA images even if corrupted by imaging artifacts. Both the combination of image processing methods and the choice of their parameters are systematically optimized to match the manual labeling of an expert for OCTA images of skin. The efficacy of this optimization-based vessel segmentation is further demonstrated on sample images as well as by a reduced error of derived quantitative vascular network characteristics.
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Affiliation(s)
- Malte Casper
- Massachusetts General Hospital, Harvard Medical School, Cutaneous Biology Research Center, Department of Dermatology, Charlestown, Massachusetts, United States
- Universität zu Lübeck, Institute of Biomedical Optics, Lübeck, Germany
| | - Hinnerk Schulz-Hildebrandt
- Universität zu Lübeck, Institute of Biomedical Optics, Lübeck, Germany
- LungenClinic Grosshansdorf, Airway Research Center North, Member of the German Center for Lung Research, Grosshansdorf, Germany
| | - Michael Evers
- Massachusetts General Hospital, Harvard Medical School, Cutaneous Biology Research Center, Department of Dermatology, Charlestown, Massachusetts, United States
- Universität zu Lübeck, Institute of Biomedical Optics, Lübeck, Germany
| | - Reginald Birngruber
- Universität zu Lübeck, Institute of Biomedical Optics, Lübeck, Germany
- Medical Laser Center Lübeck, Lübeck, Germany
| | - Dieter Manstein
- Massachusetts General Hospital, Harvard Medical School, Cutaneous Biology Research Center, Department of Dermatology, Charlestown, Massachusetts, United States
| | - Gereon Hüttmann
- Universität zu Lübeck, Institute of Biomedical Optics, Lübeck, Germany
- LungenClinic Grosshansdorf, Airway Research Center North, Member of the German Center for Lung Research, Grosshansdorf, Germany
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22
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Schulz-Hildebrandt H, Pfeiffer T, Eixmann T, Lohmann S, Ahrens M, Rehra J, Draxinger W, König P, Huber R, Hüttmann G. High-speed fiber scanning endoscope for volumetric multi-megahertz optical coherence tomography. Opt Lett 2018; 43:4386-4389. [PMID: 30211870 DOI: 10.1364/ol.43.004386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We present a forward-viewing fiber scanning endoscope (FSE) for high-speed volumetric optical coherence tomography (OCT). The reduction in size of the probe was achieved by substituting the focusing optics by an all-fiber-based imaging system which consists of a combination of scanning single-mode fibers, a glass spacer, made from a step-index multi-mode fiber, and a gradient-index fiber. A lateral resolution of 11 μm was achieved at a working distance of 1.2 mm. The newly designed piezo-based FSE has an outer diameter of 1.6 mm and a rigid length of 13.5 mm. By moving the whole imaging optic in spirals for scanning the sample, the beam quality remains constant over the entire field of view with a diameter of 0.8 mm. The scanning frequency was adjusted to 1.22 kHz for use with a 3.28 MHz Fourier domain mode locked OCT system. Densely sampled volumes have been imaged at a rate of 6 volumes per second.
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23
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Ourak M, Smits J, Esteveny L, Borghesan G, Gijbels A, Schoevaerdts L, Douven Y, Scholtes J, Lankenau E, Eixmann T, Schulz-Hildebrandt H, Hüttmann G, Kozlovszky M, Kronreif G, Willekens K, Stalmans P, Faridpooya K, Cereda M, Giani A, Staurenghi G, Reynaerts D, Vander Poorten EB. Combined OCT distance and FBG force sensing cannulation needle for retinal vein cannulation: in vivo animal validation. Int J Comput Assist Radiol Surg 2018; 14:301-309. [PMID: 30056592 DOI: 10.1007/s11548-018-1829-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/18/2018] [Indexed: 11/29/2022]
Abstract
PURPOSE Retinal vein cannulation is an experimental procedure during which a clot-dissolving drug is injected into an obstructed retinal vein. However, due to the fragility and minute size of retinal veins, such procedure is considered too risky to perform manually. With the aid of surgical robots, key limiting factors such as: unwanted eye rotations, hand tremor and instrument immobilization can be tackled. However, local instrument anatomy distance and force estimation remain unresolved issues. A reliable, real-time local interaction estimation between instrument tip and the retina could be a solution. This paper reports on the development of a combined force and distance sensing cannulation needle, and its experimental validation during in vivo animal trials. METHODS Two prototypes are reported, relying on force and distance measurements based on FBG and OCT A-scan fibres, respectively. Both instruments provide an 80 [Formula: see text] needle tip and have outer shaft diameters of 0.6 and 2.3 mm, respectively. RESULTS Both prototypes were characterized and experimentally validated ex vivo. Then, paired with a previously developed surgical robot, in vivo experimental validation was performed. The first prototype successfully demonstrated the feasibility of using a combined force and distance sensing instrument in an in vivo setting. CONCLUSION The results demonstrate the feasibility of deploying a combined sensing instrument in an in vivo setting. The performed study provides a foundation for further work on real-time local modelling of the surgical scene. This paper provides initial insights; however, additional processing remains necessary.
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Affiliation(s)
- M Ourak
- University of Leuven, Leuven, Belgium.
| | - J Smits
- University of Leuven, Leuven, Belgium
| | | | | | - A Gijbels
- University of Leuven, Leuven, Belgium
| | | | - Y Douven
- Eindhoven University of Technology, Eindhoven, The Netherlands
| | - J Scholtes
- Eindhoven University of Technology, Eindhoven, The Netherlands
| | - E Lankenau
- OptoMedical Technologies GmbH, Lübeck, Germany
| | - T Eixmann
- Medical Laser Center Lübeck GmbH, Lübeck, Germany
| | | | - G Hüttmann
- Medical Laser Center Lübeck GmbH, Lübeck, Germany
| | - M Kozlovszky
- Austrian Center for Medical Innovation and Technology Gmbh, Neustadt, Austria
| | - G Kronreif
- Austrian Center for Medical Innovation and Technology Gmbh, Neustadt, Austria
| | - K Willekens
- University Hospitals Leuven, Leuven, Belgium
| | - P Stalmans
- University Hospitals Leuven, Leuven, Belgium
| | - K Faridpooya
- The Rotterdam Eye Hospital, Rotterdam, The Netherlands
| | - M Cereda
- The Eye Clinic, University of Milan, Milan, Italy
| | - A Giani
- The Eye Clinic, University of Milan, Milan, Italy
| | - G Staurenghi
- The Eye Clinic, University of Milan, Milan, Italy
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Schulz-Hildebrandt H, Pieper M, Stehmar C, Ahrens M, Idel C, Wollenberg B, König P, Hüttmann G. Novel endoscope with increased depth of field for imaging human nasal tissue by microscopic optical coherence tomography. Biomed Opt Express 2018; 9:636-647. [PMID: 29552400 PMCID: PMC5854065 DOI: 10.1364/boe.9.000636] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 12/29/2017] [Accepted: 01/08/2018] [Indexed: 05/13/2023]
Abstract
Intravital microscopy (IVM) offers the opportunity to visualize static and dynamic changes of tissue on a cellular level. It is a valuable tool in research and may considerably improve clinical diagnosis. In contrast to confocal and non-linear microscopy, optical coherence tomography (OCT) with microscopic resolution (mOCT) provides intrinsically cross-sectional imaging. Changing focus position is not needed, which simplifies especially endoscopic imaging. For in-vivo imaging, here we are presenting endo-microscopic OCT (emOCT). A graded-index-lens (GRIN) based 2.75 mm outer diameter rigid endoscope is providing 1.5 - 2 µm nearly isotropic resolution over an extended field of depth. Spherical and chromatic aberrations are used to elongate the focus length. Simulation of the OCT image formation, suggests a better overall image quality in this range compared to a focused Gaussian beam. Total imaging depth at a reduced sensitivity and lateral resolution is more than 200 µm. Using a frame rate of 80 Hz cross-sectional images of concha nasalis were demonstrated in humans, which could resolve cilial motion, cellular structures of the epithelium, vessels and blood cells. Mucus transport velocity was successfully determined. The endoscope may be used for diagnosis and treatment control of different lung diseases like cystic fibrosis or primary ciliary dyskinesia, which manifest already at the nasal mucosa.
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Affiliation(s)
- Hinnerk Schulz-Hildebrandt
- Institute for Biomedical Optics, University of Lübeck, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 22927 Großhansdorf, Germany
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Mario Pieper
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 22927 Großhansdorf, Germany
- Institute of Anatomy, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Charlotte Stehmar
- Institute for Biomedical Optics, University of Lübeck, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
| | - Martin Ahrens
- Institute for Biomedical Optics, University of Lübeck, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 22927 Großhansdorf, Germany
| | - Christian Idel
- ENT Clinics, University Hospital Schleswig-Holstein, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Barbara Wollenberg
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 22927 Großhansdorf, Germany
- ENT Clinics, University Hospital Schleswig-Holstein, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Peter König
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 22927 Großhansdorf, Germany
- Institute of Anatomy, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Gereon Hüttmann
- Institute for Biomedical Optics, University of Lübeck, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 22927 Großhansdorf, Germany
- Medical Laser Center Lübeck GmbH, Peter-Monnik-Weg 4, 23562 Lübeck, Germany
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25
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Horstmann J, Schulz-Hildebrandt H, Bock F, Siebelmann S, Lankenau E, Hüttmann G, Steven P, Cursiefen C. Label-Free In Vivo Imaging of Corneal Lymphatic Vessels Using Microscopic Optical Coherence Tomography. Invest Ophthalmol Vis Sci 2017; 58:5880-5886. [PMID: 29149239 DOI: 10.1167/iovs.17-22286] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Corneal neovascularization, in particular lymphangiogenesis, is a limiting factor in corneal transplant survival. Novel treatment approaches focus on (selective) inhibition and regression of lymphatic vessels. Imaging clinically invisible corneal lymphatic vessels is a prerequisite for these strategies. Using a murine model, this study investigates whether corneal lymphatic vessels can be imaged using microscopic optical coherence tomography (mOCT). Methods Corneal neovascularization was induced by intrastromal placement of 11.0 nylon sutures in one eye of BALB/c mice. After 2 weeks, cross-sectional images and volumes of the corneas with a 0.5 mm lateral and axial field of view were acquired using a custom-built mOCT system enabling a resolution of 1 μm at a B-scan rate of 165/s. Three of the six animals received an additional intrastromal injection of India ink 24 hours before the measurement to stain the corneal lymphatic system in vivo. Immunohistochemistry using CD31 and LYVE-1 was used to validate the mOCT findings. Results Using mOCT, lymphatic vessels were visible as dark vessel-like structures with the lumen lacking a hyperreflective wall and mostly lacking cells. However, individual, slowly moving particles, which most likely are immune cells, occasionally could be observed inside the lumen. In lymphatic vessels of ink-stained corneas, hyperreflection and shadowing underneath was observed. Ink-filled lymphatic vessels were colocalized in consecutive corneal flat mounts of the same specimen. Conclusions Corneal lymphatic vessels can be imaged using mOCT. This novel approach opens new options for noninvasive clinical imaging of corneal lymphatic vessels for diagnostic and therapeutic indications.
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Affiliation(s)
- Jens Horstmann
- Department of Ophthalmology, University of Cologne, Cologne, Germany.,Cluster of Excellence: Cellular Stress Responses in Aging-associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Hinnerk Schulz-Hildebrandt
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Lübeck, Germany
| | - Felix Bock
- Department of Ophthalmology, University of Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | | | | | - Gereon Hüttmann
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Lübeck, Germany
| | - Philipp Steven
- Department of Ophthalmology, University of Cologne, Cologne, Germany.,Cluster of Excellence: Cellular Stress Responses in Aging-associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Claus Cursiefen
- Department of Ophthalmology, University of Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
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Horstmann J, Siebelmann S, Schulz-Hildebrandt H, Glasunow I, Schadschneider A, Hüttmann G. [Understanding OCT - Part 2: State of the Practice]. Klin Monbl Augenheilkd 2016; 234:233-247. [PMID: 27871110 DOI: 10.1055/s-0033-1358249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | | | - I Glasunow
- Institut für Physikdidaktik, Universität zu Köln
| | | | - G Hüttmann
- Institut für Biomedizinische Optik, Universität zu Lübeck
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27
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Horstmann J, Siebelmann S, Schulz-Hildebrandt H, Glasunow I, Schadschneider A, Hüttmann G. [Understanding OCT - Part 1: Basic Knowledge]. Klin Monbl Augenheilkd 2016; 234:131-143. [PMID: 27871111 DOI: 10.1055/s-0042-119126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | | | - I Glasunow
- Institut für Physikdidaktik, Universität zu Köln
| | | | - G Hüttmann
- Institut für Biomedizinische Optik, Universität zu Lübeck
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Horstmann J, Siebelmann S, Schulz-Hildebrandt H, Glasunow I, Schadschneider A, Hüttmann G. OCT verstehen – Teil 2: Praktische Aspekte und Anwendung. Augenheilkunde up2date 2016. [DOI: 10.1055/s-0042-117459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | | | - I. Glasunow
- Institut für Physikdidaktik, Universität zu Köln
| | | | - G. Hüttmann
- Institut für Biomedizinische Optik, Universität zu Lübeck
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29
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Horstmann J, Siebelmann S, Schulz-Hildebrandt H, Glasunow I, Schadschneider A, Hüttmann G. OCT verstehen – Teil 1: Physikalische Grundlagen. Augenheilkunde up2date 2016. [DOI: 10.1055/s-0042-113337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | | | - I. Glasunow
- Institut für Physikdidaktik, Universität zu Köln
| | | | - G. Hüttmann
- Institut für Biomedizinische Optik, Universität zu Lübeck
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Pieper M, Schulz-Hildebrandt H, Mall M, Hüttmann G, König P. Intravital microscopy of mucus transport in mice provides mechanistic insight into hypertonic saline treatment of Cystic Fibrosis. Pneumologie 2016. [DOI: 10.1055/s-0036-1584654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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31
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Schulz-Hildebrandt H, Pieper M, Kasper J, Traulsen N, Mall M, König P, Hüttmann G. Towards automated evaluation of mucus transport measured by microscopic OCT (mOCT) during hypertonic saline treatment of Cystic Fibrosis. Pneumologie 2016. [DOI: 10.1055/s-0036-1584651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Pieper M, Schulz-Hildebrandt H, Hüttman G, König P. Optical coherence microscopy for fast intravital imaging of airways in mice and humans with subcellular resolution. Pneumologie 2015. [DOI: 10.1055/s-0035-1556642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Schulz-Hildebrandt H, Pieper M, König P, Hüttmann G. Improved endoscopic optical coherence microscopy for imaging of humans airways in patients. Pneumologie 2015. [DOI: 10.1055/s-0035-1556641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Schulz-Hildebrandt H, Pieper M, König P, Hüttmann G. Influence of aberrations on the image quality in optical coherence microscopy. Pneumologie 2015. [DOI: 10.1055/s-0035-1556640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Schulz-Hildebrandt H, Pieper M, König P, Hüttmann G. Imaging cilial motion by endoscopic optical coherence microscopy. Pneumologie 2014. [DOI: 10.1055/s-0034-1376791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Pieper M, Schulz-Hildebrandt H, Myrtus C, Abdul RAM, Hüttmann G, König P. Untersuchung der Atemwege der Maus mit zellulärer Auflösung durch optische Kohärenz-Mikroskopie. Pneumologie 2014. [DOI: 10.1055/s-0034-1367794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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