1. Adrian Bradu

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    1. Mentioned In 115 Articles

    2. Direct en-face, speckle-reduced images using angular-compounded Master–Slave optical coherence tomography

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      Direct en-face, speckle-reduced images using angular-compounded Master–Slave optical coherence tomography
      In this paper, an angular compounding method to achieve speckle contrast reduction in optical coherence tomography (OCT) imaging is explored in detail. The angular compounding approach involves collecting multiple images at different angles of incidence, registering the images to correct for induced distortions, and then incoherently summing the images to reduce speckle. The method was experimentally demonstrated with a spectrometer-based MasterSlave enhanced OCT instrument capable of directly generating en-face images ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    3. Direct en-face, speckle-reduced images using angular-compounded Master-Slave optical coherence tomography

      Explore IOPscience
      Direct en-face, speckle-reduced images using angular-compounded Master-Slave optical coherence tomography
      In this paper, an angular compounding method to achieve speckle contrast reduction in optical coherence tomography (OCT) imaging is explored in detail. The angular compounding approach involves collecting multiple images at different angles of incidence, registering the images to correct for induced distortions, and then incoherently summing the images to reduce speckle. The method was experimentally demonstrated with a spectrometer-based Master-Slave enhanced OCT instrument capable of directly generating en-face images ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    4. En-face optical coherence tomography/fluorescence endomicroscopy for minimally invasive imaging using a robotic scanner

      Explore SPIE Digital Library Dermatology , Pulmonology
      En-face optical coherence tomography/fluorescence endomicroscopy for minimally invasive imaging using a robotic scanner
      We report a compact rigid instrument capable of delivering en-face optical coherence tomography (OCT) images alongside (epi)-fluorescence endomicroscopy (FEM) images by means of a robotic scanning device. Two working imaging channels are included: one for a one-dimensional scanning, forward-viewing OCT probe and another for a fiber bundle used for the FEM system. The robotic scanning system provides the second axis of scanning for the OCT channel while allowing the ...
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      Mentions: Imperial College London Adrian G. Podoleanu University of Kent

    5. Quantitative assessment of rat bone regeneration using complex master-slave optical coherence tomography

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      Quantitative assessment of rat bone regeneration using complex master-slave optical coherence tomography
      ackground: The need for hard and soft tissues in oral implantology determined the development of methods and techniques to increase bone volume and their quality with different alternative materials used as substituents of patients natural bone. In addition, laser radiation can be used to accelerate the repair of fractures and to produce an increased volume of formed callus, as well as an increased bone mineral density. Methods: The aim of ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    6. Optical Coherence Tomography Investigations and Modeling of the Sintering of Ceramic Crowns

      Explore MDPI Open Access Journals Platform Dentistry
      Optical Coherence Tomography Investigations and Modeling of the Sintering of Ceramic Crowns
      Dental prostheses are sintered in ovens that sometimes suffer from a loss of calibration. This can lead to variations of the sintering temperature outside the range recommended by the manufacturer. Stress and even fractures in dental ceramics may occur, and this leads to the necessity to rebuild the dental construct. The aim of this work is to monitor the quality of sintering processes using an established biomedical imaging techniqueoptical coherence ...
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      Mentions: Adrian G. Podoleanu University of Kent Cosmin Sinescu

    7. Down-conversion en-face optical coherence tomography

      Explore OSA | OSA Publishing
      Down-conversion en-face optical coherence tomography
      We present an optical coherence tomography (OCT) method that can deliver an en-face OCT image from a sample in real-time, irrespective of the tuning speed of the swept source. The method, based on the master slave interferometry technique, implements a coherence gate principle by requiring that the optical path difference (OPD) between the arms of an imaging interferometer is the same with the OPD in an interrogating interferometer. In this ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    8. Complex master-slave for long axial range swept-source optical coherence tomography

      Explore OSA | OSA Publishing
      Complex master-slave for long axial range swept-source optical coherence tomography
      Using complex master-slave interferometry, we demonstrate extended axial range optical coherence tomography for two commercially available swept sources, well beyond the limit imposed by their k -clocks. This is achieved without k -domain re-sampling and without engaging any additional Mach-Zehnder interferometer providing a k -clock signal to the digitizer. An axial imaging range exceeding 17 mm with an attenuation of less than 30 dB is reported using two commercially available ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    9. Recovering distance information in spectral domain interferometry

      Explore Nature Publishing Group
      Recovering distance information in spectral domain interferometry
      This work evaluates the performance of the Complex Master Slave (CMS) method, that processes the spectra at the interferometer output of a spectral domain interferometry device without involving Fourier transforms (FT) after data acquisition. Reliability and performance of CMS are compared side by side with the conventional method based on FT, phase calibration with dispersion compensation (PCDC). We demonstrate that both methods provide similar results in terms of resolution and ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    10. Group refractive index and group velocity dispersion measurement by complex master slave interferometry

      Explore OSA | OSA Publishing
      Group refractive index and group velocity dispersion measurement by complex master slave interferometry
      This paper demonstrates that the complex master slave interferometry ( CMSI ) method used in spectral domain interferometry ( SDI ) can efficiently be used for accurate refractive index and group velocity dispersion measurements of optically transparent samples. For the first time, we demonstrate the relevance of the phase information delivered by CMSI for dispersion evaluations with no need to linearize data. The technique proposed here has been used to accurately measure the group ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    11. Multispectral photoacoustic microscopy and optical coherence tomography using a single supercontinuum source

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      Multispectral photoacoustic microscopy and optical coherence tomography using a single supercontinuum source
      We report on the use of a single supercontinuum (SC) source for multimodal imaging. The 2-octave bandwidth (4752300 nm) makes the SC source suitable for optical coherence tomography (OCT) as well as for multispectral photoacoustic microscopy (MPAM). The IR band centered at 1310 nm is chosen for OCT to penetrate deeper into tissue with 8 mW average power on the sample. The 500840 nm band is used for MPAM. The ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    12. PhD Scholarship: Multimodal optical coherence tomography / multi-spectral photo-acoustic imaging at University of Kent

      Explore Optical Coherence Tomography News Jobs & Studentships
      PhD Scholarship: Multimodal optical coherence tomography / multi-spectral photo-acoustic imaging at University of Kent
      ...-sciences/research/aog/index.html Contact: For further information or informal enquiries, please contact Dr. Adrian Bradu (a.bradu@kent.ac.uk). How to Apply: To apply please go to: http://www.kent.ac.uk/courses/postgr...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    13. Assessment of Ductile, Brittle, and Fatigue Fractures of Metals Using Optical Coherence Tomography

      Explore MDPI Open Access Journals Platform NDE/NDT
      Assessment of Ductile, Brittle, and Fatigue Fractures of Metals Using Optical Coherence Tomography
      ome forensic in situ investigations, such as those needed in transportation (for aviation, maritime, road, or rail accidents) or for parts working under harsh conditions (e.g., pipes or turbines) would benefit from a method/technique that distinguishes ductile from brittle fractures of metalsas material defects are one of the potential causes of incidents. Nowadays, the gold standard in material studies is represented by scanning electron microscopy (SEM). However, SEM ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    15. Passive optical module for polarization-sensitive optical coherence tomography systems

      Explore OSA | OSA Publishing
      Passive optical module for polarization-sensitive optical coherence tomography systems
      The paper presents a proof-of-concept polarization-sensitive swept source optical coherence tomography (OCT) system that performs measurements of the retardance as well as of the axis orientation of a linear birefringent sample. The system performs single input state polarization-sensitive OCT and employs an optical module based on optically passive elements such as two beam displacers and a Faraday rotator. Our implementation of the PS-OCT system does not need any calibration step ...
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      Mentions: Adrian G. Podoleanu University of Kent Adrian Bradu

    16. Effects of Temperature Variations during Sintering of Metal Ceramic Tooth Prostheses Investigated Non-Destructively with Optical Coherence Tomography

      Explore MDPI Open Access Journals Platform Dentistry
      Effects of Temperature Variations during Sintering of Metal Ceramic Tooth Prostheses Investigated Non-Destructively with Optical Coherence Tomography
      Calibration loss of ovens used in sintering metal ceramic prostheses leads to stress and cracks in the material of the prostheses fabricated, and ultimately to failure of the dental treatment. Periodic calibration may not be sufficient to prevent such consequences. Evaluation methods based on firing supplemental control samples are subjective, time-consuming, and rely entirely on the technicians skills. The aim of this study was to propose an alternative procedure for ...
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      Mentions: Adrian G. Podoleanu University of Kent Cosmin Sinescu
    17. 1-15 of 115 1 2 3 4 5 6 7 8 »
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  4. About Adrian Bradu

    Adrian Bradu

    Adrian Bradu is a Research Associate in the Applied Optics Group (AOG), School of Physical Sciences, University of Kent, Canterbury, UK. He has published widely in the field of optical coherence tomography (more than 30 articles in world’s best optics journals, and more than 80 conference proceedings). Results of his research work were communicated in more than 135 conferences, workshops and meetings. Also he has co-authored a book chapter, has been awarded a patent and has several patent applications pending. His Google Scholar h-index and citations have reached 11 and over 580, respectively. Currently he is developing his research in the AOG, under the support of an European Research Council Grant, Advanced Grant fellowship awarded to Prof. Adrian Podoleanu, ”Combined time domain and spectral domain coherence gating for imaging and biosensing”. He explore how to combine principles of spectral interferometry with principles of time domain interferometry to implement novel configurations up to proof of concept, applicable to bio-sensing and cell, tissue imaging or imaging of different materials.

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