Adrian Bradu
YOU?
Author Swipe
Full-field optical coherence tomography system with a simplified dynamic focus mechanism Open
Loss of focus in depth due to the mismatch between the coherence gate and the focus gate is a limiting factor in the achievable high lateral resolution in optical coherence tomography (OCT). This work adapts a simplified dynamic focus meth…
Balanced-detection visible optical coherence tomography with a low-noise supercontinuum laser Open
This paper comprehensively demonstrates the efficiency of balanced detection in a visible optical coherence tomography instrument employing a low-noise supercontinuum laser. By using an innovative technique for digitally aligning camera pi…
View article: P-171 Visualisation of embryo morphokinetics using a novel Optical Coherence Tomography Time-Lapse (OCT-TL) system: a pilot study
P-171 Visualisation of embryo morphokinetics using a novel Optical Coherence Tomography Time-Lapse (OCT-TL) system: a pilot study Open
Study question Can OCT-TL effectively help visualise non-invasively cellular dynamics during embryo development? Summary answer OCT-TL offers a non-invasive, 3D visualization technique for detailed embryo imaging and dynamics interpretatio…
Complex master-slave enhanced optical coherence microscopy Open
We present an instrument designed to facilitate localization and high-resolution, optical coherence microscopy (OCM) imaging of small biological samples immersed in a medium several orders of magnitude greater in volume. A modified turret-…
Complex Master-Slave Enhanced Optical Coherence Microscopy Open
We present an instrument designed to facilitate localization and high-resolution, Optical Coherence Microscopy (OCM) imaging of small biological samples immersed in a medium several orders of magnitude greater in volume. A modified turret-…
Complex Master-Slave Enhanced Optical Coherence Microscopy Open
We present an instrument designed to facilitate localization and high-resolution, Optical Coherence Microscopy (OCM) imaging of small biological samples immersed in a medium several orders of magnitude greater in volume. A modified turret-…
828 kHz retinal imaging with an 840 nm Fourier domain mode locked laser Open
This paper presents a Fourier domain mode locked (FDML) laser centered around 840 nm. It features a bidirectional sweep repetition rate of 828 kHz and a spectral bandwidth of 40 nm. An axial resolution of ∼9.9 µm in water and a 1.4 cm sens…
Enhancing the axial resolution of an optoacoustic microscopy imaging instrument by using a pico-second pulse duration laser Open
In conventional optoacoustic microscopy, nanosecond pulse duration lasers are employed. When a laser delivering shorter pulse durations is used, it is expected that, from a theoretical point of view, broader, higher-frequency acoustic wave…
Novel calibration method for optical coherence tomography instruments using multiple spectrometers Open
In this report, a novel calibration method is introduced, which can be used in camera-based optical coherence tomography (OCT) instruments employing several spectrometers. To ensure that all spectrometers are calibrated, i.e. they sense th…
View article: P-295 Application of a Time-Lapse Optical Coherence Tomography (OCT) approach in a pilot study to visualise oocytes and embryos in depth
P-295 Application of a Time-Lapse Optical Coherence Tomography (OCT) approach in a pilot study to visualise oocytes and embryos in depth Open
Study question Can we visualise model oocytes and embryos during embryo development using OCT non-invasively? Summary answer This approach, new to embryology, OCT, allows visualising cells in a 3D perspective, providing more detailed infor…
Novel 1.6 MHz swept source for real-time volumetric in-vivo OCT imaging of the human retina Open
In this report, a swept source optical coherence tomography (SS-OCT) instrument, equipped with a novel, multi-MHz tuning range swept source is presented. The source, based on an electrically pumped Micro Electro Mechanical System Vertical …
A dual resonance sweeping regime in dispersion tuned akinetic swept source at 1550 nm Open
In this summary, a fully akinetic FDML-like or so-called dual resonance sweeping regime, for swept source optical coherence tomography, SS-OCT, at 1550 nm is demonstrated. Instead of modulating the optical amplifier gain reported in our pr…
Effect of an Anaerobic Fermentation Process on 3D-Printed PLA Materials of a Biogas-Generating Reactor Open
3D-printed materials are present in numerous applications, from medicine to engineering. The aim of this study is to assess their suitability for an application of interest today, that of testing of 3D-printed polylactic acid (PLA)-based r…
Enhanced resolution optoacoustic microscopy using a picosecond high repetition rate Q-switched microchip laser Open
Conventional optoacoustic microscopy (OAM) instruments have at their core a nanosecond pulse duration laser. If lasers with a shorter pulse duration are used, broader, higher frequency ultrasound waves are expected to be generated and as a…
400 Hz Volume Rate Swept-Source Optical Coherence Tomography at 1060 nm Using a KTN Deflector Open
In this Letter, a swept-source optical coherence tomography (SS-OCT) instrument employing an innovative scanning protocol for high-speed volumetric rate imaging is demonstrated. The optical source is a tunable laser based on a supercontinu…
Dual resonance akinetic dispersive cavity swept source at 900 kHz using a cFBG and an intensity modulator Open
In this paper, a fast dual resonance akinetic optical swept source operating at 1550 nm is demonstrated. Instead of modulating the optical amplifier gain reported in our previous studies, here we employ a fiber intensity modulator as a mod…
Two octaves spanning photoacoustic microscopy Open
In this study, for the first time, a Photoacoustic Microscopy instrument driven by a single optical source operating over a wide spectral range (475–2400 nm), covering slightly more than two octaves is demonstrated. Xenopus laevis tadpoles…
Endoscopic en-face optical coherence tomography and fluorescence imaging using correlation-based probe tracking Open
Forward-viewing endoscopic optical coherence tomography (OCT) provides 3D imaging in vivo, and can be combined with widefield fluorescence imaging by use of a double-clad fiber. However, it is technically challenging to build a high-perfor…
Optimization of X-ray Investigations in Dentistry Using Optical Coherence Tomography Open
The most common imaging technique for dental diagnoses and treatment monitoring is X-ray imaging, which evolved from the first intraoral radiographs to high-quality three-dimensional (3D) Cone Beam Computed Tomography (CBCT). Other imaging…
Akinetic Swept-Source Master–Slave-Enhanced Optical Coherence Tomography Open
This paper presents a different approach for processing the signal from interferometers driven by swept sources that exhibit non-linear tuning during stable time intervals. Such sources are, for example, those commercialised by Insight, wh…
Dental Diagnosis and Treatment Assessments: Between X-rays Radiography and Optical Coherence Tomography Open
A correct diagnosis in dental medicine is typically provided only after clinical and radiological evaluations. They are also required for treatment assessments. The aim of this study is to establish the boundaries from which a modern, alth…
Master-Slave principle applied to an electrically-tunable swept source-OCT system Open
In this communication, we evaluate the suitability of Master-Slave (MS) optical coherence tomography (OCT) for processing of interferograms generated by an interferometer driven by an akinetic, electrically-tunable swept source from Insigh…
From master-slave to down-conversion optical coherence tomography Open
We present here advances on the Master Slave (MS) concept, applicable to spectral/Fourier/frequency-domain optical coherence tomography (OCT) technology. Instead of obtaining an A-scan from the sample investigated via a Fourier Transform (…
En-face optical coherence tomography/fluorescence endomicroscopy for minimally invasive imaging using a robotic scanner Open
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 i…
Quantitative assessment of rat bone regeneration using complex master-slave optical coherence tomography Open
Group C is demonstrated to have a higher volume of newly-formed bone than Group B, which is better from this point of view than Group A. By analyzing the evolution of this volume of new bone in time, the most significant difference was aft…
Optical Coherence Tomography Investigations and Modeling of the Sintering of Ceramic Crowns Open
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 ceram…
Fast spectrally encoded Mueller optical scanning microscopy Open
Mueller microscopes enable imaging of the optical anisotropic properties of biological or non-biological samples, in phase and amplitude, at sub-micrometre scale. However, the development of Mueller microscopes poses an instrumental challe…
Speeding up master slave optical coherence tomography by matrix manipulation Open
International audience
Down-conversion en-face optical coherence tomography Open
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,…