Explanipedia

Real-time 3D Ultrasonic Needle Tracking with a Photoacoustic Beacon Open

Christian Baker, Weidong Liang, Richard J. Colchester, Lei Peng, Francois Joubert , et al. · 2025

Many minimally invasive procedures, such as core needle biopsy of focal liver lesions, nerve blocks, and fetal and vascular interventions, are typically performed under ultrasound guidance, which provides real-time, high-resolution visuali…

Volumetric ultrasound imaging with a sparse matrix array and integrated fiber-optic sensing for robust needle tracking in interventional procedures Open

Weidong Liang, Javad Rostami, Christian Baker, Simeon J. West, Αθανάσιος Διαμαντόπουλος , et al. · 2025

Accurate visualization of interventional devices, such as medical needles, is essential for the safe and effective guidance of minimally invasive procedures. Ultrasound (US) imaging is widely used for needle guidance, but the two-dimension…

MECOPE: Multifocal excitation compressive-sensing photoacoustic endomicroscopy through a multimode fibre Open

Tianrui Zhao, Edward Zhang, Paul C. Beard, Wenfeng Xia · 2025

Photoacoustic endoscopy has gained intensive research interest in recent years, particularly for guiding minimally invasive procedures in several clinical disciplines including oncology, cardiology and fetal medicine. Multimode fibres hold…

Seeing through multimode fibers using real-valued intensity transmission matrix with deep learning Open

Ziyu Ye, Tianrui Zhao, Wenfeng Xia · 2025

Multimode fibers (MMFs) are emerging as a highly attractive technology for applications in biomedical endoscopy and telecommunications, thanks to their ability to transmit images and data through a large number of transverse optical modes.…

Fluidic Multichambered Actuator and Multiaxis Intrinsic Force Sensing Open

Dionysios Malas, Guokai Zhang, Shuai Wang, Wei Huang, Lukas Lindenroth , et al. · 2024

Soft robots have morphological characteristics that make them preferred candidates, over their traditionally rigid counterparts, for executing physical interaction tasks with the environment. Therefore, equipping them with force sensing is…

Learning-based sound speed estimation and aberration correction for linear-array photoacoustic imaging Open

Mengjie Shi, Tom Vercauteren, Wenfeng Xia · 2024

Research on a Cross-Domain Few-Shot Adaptive Classification Algorithm Based on Knowledge Distillation Technology Open

Jiuyang Gao, Siyu Li, Wenfeng Xia, Jiuyang Yu, Yaonan Dai · 2024

With the development of deep learning and sensors and sensor collection methods, computer vision inspection technology has developed rapidly. The deep-learning-based classification algorithm requires the acquisition of a model with superio…

Photoacoustic Imaging of Interventional Devices for Guiding Minimally Invasive Medical Procedures Open

Mengjie Shi, Simeon J. West, Tom Vercauteren, Sacha Noimark, Adrien E. Desjardins , et al. · 2024

Despite rapid advancements in medical technology, accurate identification and assessment of abnormalities and precise visualisation of interventional devices are imperative for successful outcomes in minimally invasive medical procedures. …

Optical Wavefront Shaping in Biomedical Photoacoustics Open

Tianrui Zhao, Wenfeng Xia · 2024

Optical wavefront shaping is an emerging technique that controls light transportation in disordered media. It has attracted significant interest in the photoacoustics community in recent years. On one hand, photoacoustic signals can provid…

Learning-based sound speed estimation and aberration correction in linear-array photoacoustic imaging Open

Mengjie Shi, Tom Vercauteren, Wenfeng Xia · 2023

Photoacoustic (PA) image reconstruction involves acoustic inversion that necessitates the specification of the speed of sound (SoS) within the medium of propagation. Due to the lack of information on the spatial distribution of the SoS wit…

A large-transverse-size short-pulse 4-way power divider with high fidelity Open

Yiping Shi, Wenfeng Xia, Xingjia Zhang, Long Guo, Yanlei Lu , et al. · 2023

A novel compact 4-way ultra-wideband short pulse power divider (PD) based on coaxial waveguide is proposed in this paper. A nylon conical shell is inserted to replace the original transformer oil with an air block at the resonant place of …

Wavefront Shaping-Assisted Forward-Viewing Photoacoustic Endomicroscopy Based on a Transparent Ultrasound Sensor Open

Tianrui Zhao, Mengjiao Zhang, Sébastien Ourselin, Wenfeng Xia · 2022

Photoacoustic endoscopy (PAE) can provide 3D functional, molecular and structural information of tissue deep inside the human body, and thus could be well suited for guiding minimally invasive procedures such as tumour biopsy and fetal sur…

Intraoperative Needle Tip Tracking with an Integrated Fibre-Optic Ultrasound Sensor Open

Christian Baker, Miguel Xochicale, Fang-Yu Lin, Sunish Mathews, Francois Joubert , et al. · 2022

Ultrasound is an essential tool for guidance of many minimally-invasive surgical and interventional procedures, where accurate placement of the interventional device is critical to avoid adverse events. Needle insertion procedures for anae…

Enhancement of instrumented ultrasonic tracking images using deep learning Open

Efthymios Maneas, Andreas Hauptmann, Erwin J. Alles, Wenfeng Xia, Sacha Noimark , et al. · 2022

Purpose: Instrumented ultrasonic tracking provides needle localisation during ultrasound-guided minimally invasive percutaneous procedures. Here, a post-processing framework based on a convolutional neural network (CNN) is proposed to impr…

Spatiotemporal singular value decomposition for denoising in photoacoustic imaging with a low-energy excitation light source Open

Mengjie Shi, Tom Vercauteren, Wenfeng Xia · 2022

Photoacoustic (PA) imaging is an emerging hybrid imaging modality that combines rich optical spectroscopic contrast and high ultrasonic resolution, and thus holds tremendous promise for a wide range of pre-clinical and clinical application…

Enhanced Photoacoustic Visualisation of Clinical Needles by Combining Interstitial and Extracorporeal Illumination of Elastomeric Nanocomposite Coatings Open

Mengjie Shi, Semyon Bodian, Simeon J. West, Sanjayan Sathasivam, Ross J. Gordon , et al. · 2022

Ultrasound (US) image guidance is widely used for minimally invasive procedures, but the invasive medical devices (such as metallic needles), especially their tips, can be poorly visualised in US images, leading to significant complication…

Spatiotemporal singular value decomposition for denoising in photoacoustic imaging with low-energy excitation light source Open

Mengjie Shi, Tom Vercauteren, Wenfeng Xia · 2022

Photoacoustic (PA) imaging is an emerging hybrid imaging modality that combines rich optical spectroscopic contrast and high ultrasonic resolution and thus holds tremendous promise for a wide range of pre-clinical and clinical applications…

Ultrathin, high-speed, all-optical photoacoustic endomicroscopy probe for guiding minimally invasive surgery Open

Tianrui Zhao, Truc Pham, Christian Baker, Michelle Ma, Sébastien Ourselin , et al. · 2022

Photoacoustic (PA) endoscopy has shown significant potential for clinical diagnosis and surgical guidance. Multimode fibres (MMFs) are becoming increasingly attractive for the development of miniature endoscopy probes owing to their ultrat…

Ultrathin, high-speed, all-optical photoacoustic endomicroscopy probe for guiding minimally invasive surgery Open

Tianrui Zhao, Truc Pham, Christian Baker, Michelle Ma, Sébastien Ourselin , et al. · 2022

Photoacoustic (PA) endoscopy has shown significant potential for clinical diagnosis and surgical guidance. Multimode fibres (MMFs) are becoming increasing attractive for the development of miniature endoscopy probes owing to ultrathin size…

Improving needle visibility in LED-based photoacoustic imaging using deep learning with semi-synthetic datasets Open

Mengjie Shi, Tianrui Zhao, Simeon J. West, Adrien E. Desjardins, Tom Vercauteren , et al. · 2022

Photoacoustic imaging has shown great potential for guiding minimally invasive procedures by accurate identification of critical tissue targets and invasive medical devices (such as metallic needles). The use of light emitting diodes (LEDs…

Video-rate dual-modal photoacoustic and fluorescence imaging through a multimode fibre towards forward-viewing endomicroscopy Open

Tianrui Zhao, Michelle Ma, Sébastien Ourselin, Tom Vercauteren, Wenfeng Xia · 2021

Improving needle visibility in LED-based photoacoustic imaging using deep learning with semi-synthetic datasets Open

Mengjie Shi, Simeon J. West, Adrien E. Desjardins, Tom Vercauteren, Wenfeng Xia · 2021

Photoacoustic imaging has shown great potential for guiding minimally invasive procedures by accurate identification of critical tissue targets and invasive medical devices (such as metallic needles). The use of light emitting diodes (LEDs…

Biomedical Photoacoustic Imaging and Sensing Using Affordable Resources Open

Mithun Kuniyil Ajith Singh, Wenfeng Xia · 2021

The overarching goal of this book is to provide a current picture of the latest developments in the capabilities of biomedical photoacoustic imaging and sensing in an affordable setting, such as advances in the technology involving light s…

Video-rate dual-modal forward-viewing photoacoustic and fluorescence endo-microscopy through a multimode fibre Open

Tianrui Zhao, Michelle Ma, Sébastien Ourselin, Tom Vercauteren, Wenfeng Xia · 2021

Multimode fibres are becoming increasingly attractive in optical endoscopy as they promise to enable unparalleled miniaturisation, spatial resolution and cost as compared to conventional fibre bundle-based counterpart. However, achieving h…

Biomedical Photoacoustic Imaging and Sensing Using Affordable Resources Open

Mithun Kuniyil Ajith Singh, Wenfeng Xia · 2021

The photoacoustic (PA) effect, also called the optoacoustic effect, was discovered in the 1880s by Alexander Graham Bell and has been utilized for biomedical imaging and sensing applications since the early 1990s [...]

Focusing light through multimode fibres using a digital micromirror device: a comparison study of non-holographic approaches Open

Tianrui Zhao, Sébastien Ourselin, Tom Vercauteren, Wenfeng Xia · 2021

Focusing light through a multimode fibre (MMF) has attracted significant research interest, mainly driven by the need for miniature endoscopes in biomedicine. In recent years, digital micromirror devices (DMD) have become increasingly popu…

Multispectral tissue mapping: developing a concept for the optical evaluation of liver disease Open

C. Schneider, Daniil I. Nikitichev, Wenfeng Xia, Kurinchi Selvan Gurusamy, Adrien E. Desjardins , et al. · 2020

Purpose: Alterations in the optical absorption behavior of liver tissue secondary to pathological processes can be evaluated by multispectral analysis, which is increasingly being explored as an imaging adjunct for use in liver surg…

High-speed photoacoustic-guided wavefront shaping for focusing light in scattering media Open

Tianrui Zhao, Sébastien Ourselin, Tom Vercauteren, Wenfeng Xia · 2020

Wavefront shaping is becoming increasingly attractive as it promises to enable various biomedical applications by breaking through the optical diffusion limit that prevents light focusing at depths larger than in biological tissue. …

Portable and Affordable Light Source-Based Photoacoustic Tomography Open

Mithun Kuniyil Ajith Singh, Wenfeng Xia · 2020

Photoacoustic imaging is a hybrid imaging modality that offers the advantages of optical (spectroscopic contrast) and ultrasound imaging (scalable spatial resolution and imaging depth). This promising modality has shown excellent potential…

Seeing through multimode fibers with real-valued intensity transmission matrices Open

Tianrui Zhao, Sébastien Ourselin, Tom Vercauteren, Wenfeng Xia · 2020

Image transmission through multimode optical fibers has been an area of immense interests driven by the demand for miniature endoscopes in biomedicine and higher speed and capacity in telecommunications. Conventionally, a complex-valued tr…

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