All Outputs (25)

Cytosponge procedures produce fewer respiratory aerosols and droplets than oesophagogastroduodenoscopies (2023)
Journal Article

Esophagogastroduodenoscopies (EGD) are aerosol-generating procedures that may spread respiratory pathogens. We aim to investigate the production of airborne aerosols and droplets during Cytosponge procedures, which are being evaluated in large-scale... Read More about Cytosponge procedures produce fewer respiratory aerosols and droplets than oesophagogastroduodenoscopies.

Single-ended recovery of optical fiber transmission matrices using neural networks (2023)
Journal Article

Ultra-thin multimode optical fiber imaging promises next-generation medical endoscopes reaching high image resolution for deep tissues. However, current technology suffers from severe optical distortion, as the fiber’s calibration is sensitive to ben... Read More about Single-ended recovery of optical fiber transmission matrices using neural networks.

Bronchoscopy masks mitigate aerosols during upper gastrointestinal endoscopies (2023)
Journal Article

Background and study aims: Upper gastrointestinal endoscopies are considered aerosol-generating procedures (AGP) that risk spread of airborne diseases such as SARS-CoV-2. We aimed to investigate where clinically approved bronchoscopy masks applied to... Read More about Bronchoscopy masks mitigate aerosols during upper gastrointestinal endoscopies.

Designing and simulating realistic spatial frequency domain imaging systems using open-source 3D rendering software (2023)
Journal Article

Spatial frequency domain imaging (SFDI) is a low-cost imaging technique that maps absorption and reduced scattering coefficients, offering improved contrast for important tissue structures such as tumours. Practical SFDI systems must cope with variou... Read More about Designing and simulating realistic spatial frequency domain imaging systems using open-source 3D rendering software.

Air filtration mitigates aerosol levels both during and after endoscopy procedures (2023)
Journal Article

Objectives: Upper gastrointestinal endoscopies are aerosol‐generating procedures, increasing the risk of spreading airborne pathogens. We aim to quantify the mitigation of airborne particles via improved ventilation, specifically laminar flow theatre... Read More about Air filtration mitigates aerosol levels both during and after endoscopy procedures.

Ultra-miniaturised spatial frequency domain imaging for improved early detection of gastrointestinal cancers (2023)
Journal Article

The low five year-survival rates for gastrointestinal cancers evidences a strong clinical need to improve their early detection. Current imaging methods for early detection are expensive and rely on white light imaging which lacks sufficient contrast... Read More about Ultra-miniaturised spatial frequency domain imaging for improved early detection of gastrointestinal cancers.

Diffractive metasurface light-shaping from fiber endoscope probes for increased depth of field (2023)
Journal Article

In applications such as optical coherence tomography, there is a need both to achieve large depth of field by light shaping and to maintain ultracompact form factors. Flat metasurfaces on optical fibers can achieve such requirements, with designs suc... Read More about Diffractive metasurface light-shaping from fiber endoscope probes for increased depth of field.

Global phase insensitive loss function for deep learning in holographic imaging and projection applications (2023)
Journal Article

Holographic imaging and projection are increasingly used for important applications such as augmented reality, 3D microscopy and imaging through optical fibres. However, there are emerging applications that require control or detection of phase, wher... Read More about Global phase insensitive loss function for deep learning in holographic imaging and projection applications.

Modified bronchoscopy masks mitigate aerosols during gastroscopies (2022)
Working Paper

Digestive endoscopy has been proven to produce aerosols (1–3). This represents a risk of infection by COVID-19 and other airborne viruses. A number of protective barriers have been proposed to minimise that risk. Continuous suction of the oral cavity... Read More about Modified bronchoscopy masks mitigate aerosols during gastroscopies.

Smart Surface Radio Environments (2022)
Journal Article

This Roadmap takes the reader on a journey through the research in electromagnetic wave propagation control via reconfigurable intelligent surfaces. Metasurface modelling and design methods are reviewed along with physical realisation techniques. Sev... Read More about Smart Surface Radio Environments.

Training generative adversarial networks for optical property mapping using synthetic image data (2022)
Journal Article

We demonstrate the training of a generative adversarial network (GAN) for the prediction of optical property maps (scattering and absorption) using spatial frequency domain imaging (SFDI) image data sets that are generated synthetically with a free o... Read More about Training generative adversarial networks for optical property mapping using synthetic image data.

Aerosol and droplet generation in upper and lower GI endoscopy: whole procedure and event-based analysis (2022)
Journal Article

Background and Aims: Aerosol-generating procedures have become an important healthcare issue during the coronavirus disease 2019 (COVID-19) pandemic because the severe acute respiratory syndrome coronavirus 2 virus can be transmitted through aerosols... Read More about Aerosol and droplet generation in upper and lower GI endoscopy: whole procedure and event-based analysis.

Spectrally tailored hyperpixel filter arrays for efficient imaging of chemical compositions (2022)
Journal Article

We present a method for designing and fabricating 'HyperPixels': pixel filter arrays with custom spectral transmission properties that enable efficient imaging of specific chromophores or fluorophores. Multispectral imaging typically targets particul... Read More about Spectrally tailored hyperpixel filter arrays for efficient imaging of chemical compositions.

Transfering ultra-Thin metallic metasurfaces to fibre endoscope probes for advanced imaging (2022)
Conference Proceeding

In this paper we present a method to transfer ultra-Thin polymer-encapsulated metallic metasurfaces onto optical fibers to enable ultra-Thin imaging devices. The metasurface is first produced by conventional e-beam lithography on a silicon substrate... Read More about Transfering ultra-Thin metallic metasurfaces to fibre endoscope probes for advanced imaging.

Polarization-Insensitive Medium-Switchable Holographic Metasurfaces (2021)
Journal Article

The adoption of metasurfaces has led to revolutionary advances in holography due to improved compactness, integrability, and performance. Switchable meta-holograms projecting different replay field images in a controllable manner are highly desirable... Read More about Polarization-Insensitive Medium-Switchable Holographic Metasurfaces.

Simulating medical applications of tissue optical property and shape imaging using open-source ray tracing software (2021)
Journal Article

Oesophageal cancer and colon cancer have five year survival rates of 15% and 63% respectively. These low survival rates are due in part to poor early detection during endoscopic screening, with conventional endoscopes providing insufficient informati... Read More about Simulating medical applications of tissue optical property and shape imaging using open-source ray tracing software.

Robustness to misalignment of low-cost, compact quantitative phase imaging architectures (2020)
Journal Article

Non-interferometric approaches to quantitative phase imaging could enable its application in low-cost, miniaturised settings such as capsule endoscopy. We present two possible architectures and both analyse and mitigate the effect of sensor misalignm... Read More about Robustness to misalignment of low-cost, compact quantitative phase imaging architectures.

Quantitative phase and polarization imaging through an optical fiber applied to detection of early esophageal tumorigenesis (2019)
Journal Article

© The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. Phase and polarization... Read More about Quantitative phase and polarization imaging through an optical fiber applied to detection of early esophageal tumorigenesis.

Characterizing Optical Fiber Transmission Matrices Using Metasurface Reflector Stacks for Lensless Imaging without Distal Access (2019)
Journal Article

Coherent Imaging Through Multicore Fibres With Applications in Endoscopy (2019)
Journal Article