1. Gereon Hüttmann

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    1. Mentioned In 53 Articles

    2. An Approach for Needle Based Optical Coherence Elastography Measurements

      An Approach for Needle Based Optical Coherence Elastography Measurements
      While navigation and interventional guidance are typically based on image data, the images do not necessarily reflect mechanical tissue properties. Optical coherence elastography (OCE) presents a modality with high sensitivity and very high spatial and temporal resolution. However, OCE has a limited field of view of only 25 mm depth. We present a side-facing needle probe to image externally induced shear waves from within soft tissue. A first method of ...
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    3. Reduction of frame rate in full-field swept-source optical coherence tomography by numerical motion correction [Invited]

      Reduction of frame rate in full-field swept-source optical coherence tomography by numerical motion correction [Invited]
      Full-field swept-source optical coherence tomography (FF-SS-OCT) was recently shown to allow new and exciting applications for imaging the human eye that were previously not possible using current scanning OCT systems. However, especially when using cameras that do not acquire data with hundreds of kHz frame rate, uncorrected phase errors due to axial motion of the eye lead to a drastic loss in image quality of the reconstructed volumes. Here we ...
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    4. In-vivo retinal imaging with off-axis full-field time-domain optical coherence tomography

      In-vivo retinal imaging with off-axis full-field time-domain optical coherence tomography
      With a simple setup, mainly composed of a low coherence light source and a camera, full-field optical coherence tomography (FF-OCT) allows volumetric tissue imaging. However, fringe washout constrains its use in retinal imaging. Here, we present a novel motion-insensitive approach to FF-OCT, which introduces path-length differences between the reference and the sample light in neighboring pixels using an off-axis reference beam. The temporal carrier frequency in scanned time-domain OCT is ...
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    5. Feature Of The Week 10/25/2015: Imaging Pulse Wave Propagation in Human Retina using Full-Field Swept-Source OCT

      Feature Of The Week 10/25/2015: Imaging Pulse Wave Propagation in Human Retina using Full-Field Swept-Source OCT
      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 ...
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    6. Imaging pulse wave propagation in human retinal vessels using full-field swept-source optical coherence tomography

      Imaging pulse wave propagation in human retinal vessels using full-field swept-source optical coherence tomography
      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 ...
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    7. Future Prospects: Assessment of Intraoperative Optical Coherence Tomography in Ab Interno Glaucoma Surgery

      Future Prospects: Assessment of Intraoperative Optical Coherence Tomography in Ab Interno Glaucoma Surgery
      Purpose : Ab interno glaucoma surgery , such as trabecular aspiration or ab interno trabeculotomy, has been introduced as an alternative, non-filtering procedure to lower intraocular pressure in glaucoma patients. The purpose of the present study was to assess the feasibility of intraoperative spectral domain optical coherence tomography (iOCT) for improving ab interno glaucoma surgery . Materials and Methods : Intraoperative optical coherence tomography was performed to visualize the anterior chamber angle, the aspiration ...
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    8. Microanatomy of the tympanic membrane in chronic myringitis obtained with optical coherence tomography

      Microanatomy of the tympanic membrane in chronic myringitis obtained with optical coherence tomography
      A microscope-based optical coherence tomography (OCT) device was used to assess the microanatomy of the tympanic membrane in patients with chronic myringitis. A prospective study was designed for this purpose. OCT measurements of the tympanic membrane were done on 11 patients with myringitis with a microscope-based spectral domain OCT system. The in vivo findings were compared with those findings of a control group consisting of 36 patients with retraction pockets ...
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    9. Device with an OCT system for examining and treating living tissue by means of heating of the tissue by absorbing electromagnetic radiation

      Device with an OCT system for examining and treating living tissue by means of heating of the tissue by absorbing electromagnetic radiation
      A device for examining or treating living tissue by means of local heating of the tissue by absorbing electromagnetic radiation, with at least one radiation source emitting electromagnetic radiation, a control unit for controlling the irradiation parameters of the radiation source, and at least one FD-OCT apparatus with a light source emitting a measurement light for illuminating that tissue region in which the electromagnetic radiation is absorbed by the tissue ...
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    10. Optimising deep anterior lamellar keratoplasty (DALK) using intraoperative online optical coherence tomography (iOCT)

      Optimising deep anterior lamellar keratoplasty (DALK) using intraoperative online optical coherence tomography (iOCT)
      Background/aims To describe the use of intraoperative online optical coherence tomography (iOCT) for improving deep anterior lamellar keratoplasty (DALK) surgery. Methods Retrospective case series of 6 eyes of 6 male patients with keratokonus, corneal dystrophy or herpetic stromal scars undergoing DALK were investigated using intraoperative optical coherence tomography and postsurgical image/video analysis. Main outcome measures were: visibility of surgical steps, especially, assessment of placement depth of injection needle ...
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    11. OCT A-Scan based lung tumor tissue classification with Bidirectional Long Short Term Memory networks

      OCT A-Scan based lung tumor tissue classification with Bidirectional Long Short Term Memory networks
      This paper presents a novel method for lung tumor tissue classification using Bidirectional Long Short Term Memory networks (BLSTMs). Samples are obtained through Optical Coherence Tomography (OCT) from real soft tissue specimen and represented as data sequences. Such sequences are learned with BLSTMs, which are able to recognize even non-uniformly compressed temporal encoded patterns in sequential data in both forward and backward time-direction. Our experiments indicate that BLSTMs are a ...
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    12. Optimizing Descemet Membrane Endothelial Keratoplasty Using Intraoperative Optical Coherence Tomography

      Optimizing Descemet Membrane Endothelial Keratoplasty Using Intraoperative Optical Coherence Tomography
      Importance Descemet membrane endothelial keratoplasty (DMEK) is a challenging procedure for the surgeon, particularly because of deficient visibility of the delicate tissue due to the natural en face view through the operating microscope. A cross-sectional view would greatly enhance intraoperative overview and enable the surgeon to better control the procedure. Objective To retrospectively analyze the use of intraoperative optical coherence tomography (iOCT) for improving the safety of DMEK. Design Intraoperative ...
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  2. About Gereon Hüttmann

    Gereon Hüttmann

    Gereon Hüttmann is with the Institute for Biomedical Optics at the University of Lübeck.