Articles that mention Jeroen Kalkman -Optical Coherence Tomography News

Jeroen Kalkman

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1. Mentioned In 33 Articles
2. Optimization-based adaptive optics for optical coherence tomography (Thesis)
  
  Explore TU Delft Institutional Repository Mar 17 2017 Student Theses
  
  Optical coherence tomography (OCT) is a technique for non-invasive imaging based on low coherence interferometry. Its main application is found in ophthalmology, where it is used for 3D in vivo imaging of the cornea and the retina. OCT has evolved over the past decade as one of the most important ancillary tests in ophthalmic practice, providing great diagnostic value for disease screening and monitoring. In retinal OCT imaging, the lateral ...
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  Mentions: Jeroen Kalkman Delft University of Technology
3. The amplitude and the phase or: Measuring directional and random motion with optical coherence tomography (Thesis)
  
  Explore UvA DARE Dec 13 2016 Student Theses
  
  Optical coherence tomography (OCT) uses a low coherence light source and a Michelson interferometer to measure path-length resolved backscatter profiles of samples with micrometer resolution and up to a few millimeters long. The OCT amplitude is typically used to generate images of the sample. Additionally, the amplitude and the phase of the OCT signal can be used to extract quantitative sample information such as layer thickness, refractive index, and flow ...
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  Mentions: Jeroen Kalkman Ton G. van Leeuwen
4. Measurement of biofilm growth and local hydrodynamics using optical coherence tomography
  
  Explore OSA | OSA Publishing Aug 17 2016
  
  We report on localized and simultaneous measurement of biofilm growth and local hydrodynamics in a microfluidic channel using optical coherence tomography. We measure independently with high spatio-temporal resolution the longitudinal flow velocity component parallel to the imaging beam and the transverse flow velocity component perpendicular to the imaging beam. Based on the measured velocities we calculate the shear-rates in the flow channel. We show the relation between the measured biofilm ...
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  Mentions: Academic Medical Center at the University of Amsterdam Jeroen Kalkman Ton G. van Leeuwen
5. "Transmission Optical Coherence Tomography Sensing" - Presented by Jeroen Kalkman, TU Delft
  
  Explore healthtechevent.com Apr 13 2016
  
  ... in water over the spectral bandwidth. Applications in the food, dairy, oil, medical field are presented. Dr. Jeroen Kalkman has a strong expertise in the area of optical coherence tomography (OCT) with more than 17 pape...
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  Mentions: Leiden University Jeroen Kalkman Delft University of Technology
6. Transmission optical coherence tomography based measurement of optical material properties
  
  Explore OSA | OSA Publishing Dec 26 2015
  
  We present transmission optical coherence tomography (transmission OCT) as a versatile tool to measure optical material properties of turbid media. The transmission OCT signal is described in detail and it is demonstrated how the group refractive index ( n g ), group velocity dispersion (GVD) and optical attenuation can be determined from this signal. We experimentally validate the refractive index properties of glasses, liquids and glucose water solutions in terms of n ...
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  Mentions: Jeroen Kalkman Delft University of Technology
7. Model-based sensor-less wavefront aberration correction in optical coherence tomography
  
  Explore OSA | OSA Publishing Dec 13 2015
  
  Several sensor-less wavefront aberration correction methods that correct nonlinear wavefront aberrations by maximizing the optical coherence tomography (OCT) signal are tested on an OCT setup. A conventional coordinate search method is compared to two model-based optimization methods. The first model-based method takes advantage of the well-known optimization algorithm (NEWUOA) and utilizes a quadratic model. The second model-based method (DONE) is new and utilizes a random multidimensional Fourier-basis expansion. The model-based ...
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  Mentions: Jeroen Kalkman Delft University of Technology
8. Simultaneous and localized measurement of diffusion and flow using optical coherence tomography
  
  Explore opticsinfobase.org Feb 4 2015
  
  ...n G. van Leeuwen, and Jeroen Kalkman »View Author Affiliations Nicolás Weiss,^1,^* Ton G. van Leeuwen,^1 and Jeroen Kalkman^2 ^1Biomedical Engineering & Physics, Academic Medical Center, University of Amsterdam, PO Bo...
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  Mentions: Jeroen Kalkman Delft University of Technology Ton G. van Leeuwen
9. Towards model-based adaptive optics optical coherence tomography
  
  Explore opticsinfobase.org Dec 23 2014 Microscopy
  
  ...d: December 23, 2014 Citation Hans R. G. W. Verstraete, Barry Cense, Rolf Bilderbeek, Michel Verhaegen, and Jeroen Kalkman, "Towards model-based adaptive optics optical coherence tomography," Opt. Express 22, 32406-324...
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  Mentions: Jeroen Kalkman Barry Cense Delft University of Technology
10. Simultaneous measurement of localized diffusion and flow using optical coherence tomography
  
  Explore arxiv.org Nov 23 2014
  
  We report on the simultaneous and localized measurements of the diffusion coefficient and flow velocity based on the normalized autocorrelation function using optical coherence tomography (OCT). Our results on a flowing solution of polystyrene spheres show that the flow velocity and the diffusion coefficient can be reliably estimated in a regime determined by the sample diffusivity, the local flow velocity, and the Gaussian beam waist. We experimentally show that a ...
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  Mentions: Jeroen Kalkman Ton G. van Leeuwen
11. Ultra-compact silicon photonic integrated interferometer for swept-source optical coherence tomography
  
  Explore opticsinfobase.org Aug 27 2014
  
  ...n and integration with active components. © 2014 Optical Society of America Günay Yurtsever, Nicolás Weiss, Jeroen Kalkman, Ton G. van Leeuwen, and Roel Baets, "Ultra-compact silicon photonic integrated interferometer ...
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  Mentions: Jeroen Kalkman Delft University of Technology Ton G. van Leeuwen
12. Dependent and multiple scattering in transmission and backscattering optical coherence tomography
  
  Explore opticsinfobase.org Nov 18 2013
  
  We use transmission and backscattering optical coherence tomography (OCT) to distinguish and quantify dependent and multiple scattering effects in turbid media. With transmission OCT the dependent scattering coefficients for a range of monodisperse silica particle suspensions are determined. An excellent agreement is observed between the measured dependent scattering coefficients and calculations based on Mie calculations, the Percus-Yevick radial distribution function, and coherent light scattering theory. Backscattering OCT measurements are fitted ...
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  Mentions: Jeroen Kalkman Dirk J. Faber Delft University of Technology
13. Localized measurement of longitudinal and transverse flow velocities in colloidal suspensions using optical coherence tomography
  
  Explore Physical Review E Nov 2 2013
  
  We report on localized measurement of the longitudinal and transverse flow velocities in a colloidal suspension using optical coherence tomography. We present a model for the path-length resolved autocorrelation function including diffusion and flow, which we experimentally verify. For flow that is not perpendicular to the incident beam, the longitudinal velocity gradient over the coherence gate causes additional decorrelation, which is described by our model. We demonstrate simultaneous imaging of ...
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  Mentions: Academic Medical Center at the University of Amsterdam Jeroen Kalkman Delft University of Technology
14. Integrated-optics-based optical coherence tomography (Thesis)
  
  Explore UvA DARE Oct 19 2013 Student Theses
  
  Optical coherence tomography (OCT) is a high resolution, imaging technique that has developed over the last 20 years from a complicated laboratory setup into a ready-to-use commercially available device. Instead of using electronic time gating as being used by ultrasound (US) imaging, in OCT, the optical analogue of US imaging, determines the time of flight using low coherence interferometry. To date, OCT has many clinical applications and is widely used ...
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  Mentions: Academic Medical Center at the University of Amsterdam Jeroen Kalkman Ton G. van Leeuwen
15. Job Delft University of Technology - 2 PhDs in Optical Tomography
  
  Explore Optical Coherence Tomography News Oct 16 2013 Jobs & Studentships
  
  ...several university medical centres), industry, and governmental research institutes. Additional information Jeroen Kalkman +31 (0)15-2785331 j.kalkman@tudelft.nl Technische Universiteit Delft More information about emp...
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  Mentions: Jeroen Kalkman Delft University of Technology
16. Common detector for combined raman spectroscopy-optical coherence tomography
  
  Explore uspto.gov Oct 8 2013 Microscopy , Patents
  
  An apparatus includes first and second light sources for respectively generating broadband and monochromatic lights, a beamsplitter optically coupled to the first light source for splitting the broadband light into a reference light and a sample light, a reference arm optically coupled to the beamsplitter for receiving the reference light and returning the received reference light into the beamsplitter, a sample arm optically coupled to the beamsplitter and the second ...
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  Mentions: Vanderbilt University Academic Medical Center at the University of Amsterdam Jeroen Kalkman
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