Article
Optics
Junsoo Lee, Hoseong Cho, Sungjo Park, Jaeyul Lee, Daewoon Seong, Ruchire Eranga Wijesinghe, Sangyeob Han, Shinheon Kim, Mansik Jeon, Jeehyun Kim
Summary: This study evaluates the cervicothoracic vasculature of mouse and rat specimens using a commercial PACT device, revealing various blood vessels and specific anatomical features that could be used as a reference for future preclinical experiments.
Article
Biochemical Research Methods
Jaya Prakash, Sandeep Kumar Kalva, Manojit Pramanik, Phaneendra K. Yalavarthy
Summary: The proposed binary tomography approach accurately recovers vasculature structures, enabling its potential utilization in scenarios such as therapy monitoring and hemorrhage detection. In photoacoustic tomography, direct reconstruction of vascular networks is possible with this binary approach, leading to improved vasculature recovery compared to other methods.
JOURNAL OF BIOMEDICAL OPTICS
(2021)
Article
Optics
Chia-hsun Hsu, Hai-long Luo, Shi-tao Li, Fu-qiang Bian, Ya-zhen Chen, Peng Gao, Wan-yu Wu, Dong-sing Wuu, Feng-min Lai, Shui-yang Lien, Wen-zhang Zhu
Summary: Atomic layer deposited Al2O3 films as moisture barrier layers significantly enhance the moisture resistance and stability of miniature light emitting diodes (mini-LEDs), allowing them to perform better under high temperature and high humidity conditions.
Article
Physics, Applied
Ziqian Qi, Linning Wang, Yingze Liang, Pengzhan Liu, Hongbo Zhu, Yongjin Wang
Summary: This article introduces a solar-blind full-duplex light communication system using 275-nm DUV LEDs, which eliminates electromagnetic interference and solar noise. The system allows a maximum communication distance of 7 meters and supports real-time video and file sharing.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
G. Kalyon, S. Mutlu, F. Kuruoglu, I. Pertikel, I. Demir, A. Erol
Summary: We report an n-type In0.53Ga0.47As based Gunn light emitting diode operated at around 1.6 mu m. The device structure comprises of an n-type In0.53Ga0.47As epilayer with a thickness of 5 mu m grown by Metal Organic Vapour Phase Epitaxy (MOVPE) on a semi-insulating InP substrate and fabricated in a planar architecture with a stepped structure at anode side to suppress the destructive effect of high built-in electric field in propagating Gunn domain. Gunn diode is operated under pulsed voltage with a pulse width of 60 ns and pulse duration of 4.5 ns to keep the duty cycle as low as 0.0013%. The Gunn oscillations with an 1 ns period are observed at around 4.1 kV/ cm, which corresponds to the electric field threshold of Negative Differential Resistance (NDR). The light emission at around 1.6 mu m also starts at the threshold electric field of the NDR region (E = 4.2 kV/cm) of the current-voltage curve, and the emission intensity increases drastically with increasing applied electric field. The observed light emission at NDR threshold electric field where Gunn oscillations appear on the voltage pulse is attributed to the impact ionisation process occurring in the current domains along the sample, which generates excess carriers to initiate the band-to-band recombination in In0.53Ga0.47As.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Optics
Daewoon Seong, Sangyeob Han, Jaeyul Lee, Euimin Lee, Yoonseok Kim, Junsoo Lee, Mansik Jeon, Jeehyun Kim
Summary: Photoacoustic imaging is a non-invasive technique merging high optical contrast and high acoustic resolution in deep tissues. The development of a waterproof, handheld PAM system with extended field of view has improved its versatility for wide-range imaging applications. Studies confirm the feasibility and applicability of the system for various biomedical imaging purposes.
Article
Chemistry, Multidisciplinary
Yu-Jin Kim, Sung-Won Kim, Ju-Ro Lee, Soong Ho Um, Yoon Ki Joung, Suk Ho Bhang
Summary: This study investigated the cytotoxic effects of LED and OLED light sources on stem cells, finding that the LED group induced higher apoptotic activity due to significant heat generation compared to OLED. Additionally, the LED group showed significant expression of intracellular reactive oxygen species, while increased cell proliferation was confirmed in the OLED group.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
M. Atif, Lothar Lilge, Atif Hanif, Shafiq Ahmad, S. Devanesan
Summary: Photoacoustic imaging is an evolving modality for studying and imaging tumor hypoxia. Experimental results show a short-term increase followed by a strong decrease in the tumor vasculature after Photodynamic Therapy (PDT), but no complete stasis. An alternate method is developed by analyzing the spatial and frequency domain histogram of the tumor vasculature using two-dimensional Fast Fourier Transform (FFT). The variations in acoustic impedance and hemoglobin levels after PDT are studied, and their impact on tumor necrosis is investigated.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Ning Tu, S. W. Ricky Lee
Summary: This paper presents a large-emitting-area quantum dot light-emitting diode (QLED) fabricated using a full-solution process. The QLED exhibits a low turn-on voltage and its unique structure enables its application in inkjet printing and display applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemical Research Methods
Michaela Taylor-Williams, Stephen Mead, Travis W. Sawyer, Lina Hacker, Calum Williams, Michael Berks, Andrea Murray, Sarah E. Bohndiek
Summary: This study designed, constructed, and tested a low-cost multispectral imaging system using LED illumination to assess relative hemoglobin oxygenation in the nailfold capillaries. The results demonstrated that LED-based illumination could be used as a low-cost approach to enable multispectral imaging of the nailfold capillaries to provide insight into the oxygenation of the blood contained within the capillary network.
JOURNAL OF BIOMEDICAL OPTICS
(2022)
Review
Computer Science, Information Systems
Yubu Zhou, Huayu Gao, Jing Wang, Fion Sze Yan Yeung, Shenghuang Lin, Xianbo Li, Shaolin Liao, Dongxiang Luo, Hoi Sing Kwok, Baiquan Liu
Summary: Organic light-emitting diodes (OLEDs) are a promising technology for displays and lighting due to their numerous advantages. Ultrathin emitting nanolayers (UENs) have been used to develop OLEDs without the doping technique, simplifying device structure and achieving comparable performance to doped devices. This review comprehensively summarizes recent progress in UEN-based OLEDs, including a comparison between doped and doping-free OLEDs, effective design approaches, and future development prospects.
Article
Chemistry, Multidisciplinary
Miaoxia Liu, Gerardo Salinas, Jing Yu, Antoine Cornet, Haidong Li, Alexander Kuhn, Neso Sojic
Summary: Multimodal imaging is a powerful approach that integrates multiple optical modalities in a single device, with potential applications in various fields. In this study, we developed wireless multimodal light-emitting chemical systems by coupling two light sources based on different physical principles. The results provide a novel alternative for designing autonomous hybrid systems with multimodal and multicolor optical readouts for complex bio-chemical systems.
Article
Medicine, Research & Experimental
Soham Samanta, Meina Huang, Shaoqiang Li, Zhigang Yang, Ying He, Zhenyu Gu, Jianguo Zhang, Dan Zhang, Liwei Liu, Junle Qu
Summary: This study systematically assessed the structural dependency of an AIE-based system and how the structural modifications can impact the in vivo two-photon imaging. The designed AIE NPs showed higher brightness, improved photostability, and good two-photon absorption cross section, leading to successful in vivo brain vasculature imaging with outstanding penetration depth and spatial resolution.
Article
Materials Science, Multidisciplinary
Gyu Jin Choi, Jeong Won Ryu, Ji-Young Jeong, Tae-Jin Je, Dong Ki Yoon, Jin Seog Gwag
Summary: The study shows that combining an organic light-emitting display (OLED) device with an advanced optical film can achieve highly enhanced light extraction and low ambient light reflection without the need for a polarizer. The optical efficiency of the OLED device with the proposed film has been significantly improved compared to a polarizer-based OLED device, with external light reflection reduced to approximately 10%. Experimental data confirms that the film for enhancing optical efficiency (FEOE) improves the overall optical efficiency of OLED devices, making FEOE-based OLEDs of significant interest in materials science and display devices.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Philipp Grimm, Stefan Zeissner, Maximilian Roedel, Simon Wiegand, Sebastian Hammer, Monika Emmerling, Enno Schatz, Rene Kullock, Jens Pflaum, Bert Hecht
Summary: This study presents a nanoscale organic light-emitting antenna (OLEA) structure that serves as a color- and directionality-switchable light source. The structure utilizes gold nanoantennas and an organic semiconductor to achieve color and emission direction switching based on the polarity of the applied voltage. The OLEA structure facilitates efficient radiation transfer and eliminates the need for transparent electrodes.
Article
Biochemical Research Methods
Xianjin Dai, Tao Zhang, Hao Yang, Jianbo Tang, Paul R. Carney, Huabei Jiang
JOURNAL OF BIOPHOTONICS
(2018)
Article
Engineering, Biomedical
Hao Yang, Dingkang Wang, Tianqi Shan, Xianjin Dai, Huikai Xie, Lily Yang, Huabei Jiang
PHYSICS IN MEDICINE AND BIOLOGY
(2019)
Article
Radiology, Nuclear Medicine & Medical Imaging
Don Vernekohl, Moiz Ahmad, Xianjin Dai, Wei Zhao, Kai Cheng, Lei Xing
Article
Optics
Xianjin Dai, Kai Cheng, Wei Zhao, Lei Xing
Article
Biochemical Research Methods
Xianjin Dai, Kai Cheng, Wei Zhao, Lei Xing
JOURNAL OF BIOPHOTONICS
(2020)
Article
Radiology, Nuclear Medicine & Medical Imaging
Xianjin Dai, Yang Lei, Yupei Zhang, Richard L. J. Qiu, Tonghe Wang, Sean A. Dresser, Walter J. Curran, Pretesh Patel, Tian Liu, Xiaofeng Yang
Article
Radiology, Nuclear Medicine & Medical Imaging
Xianjin Dai, Yang Lei, Yabo Fu, Walter J. Curran, Tian Liu, Hui Mao, Xiaofeng Yang
Article
Engineering, Biomedical
Xianjin Dai, Yang Lei, Yingzi Liu, Tonghe Wang, Lei Ren, Walter J. Curran, Pretesh Patel, Tian Liu, Xiaofeng Yang
PHYSICS IN MEDICINE AND BIOLOGY
(2020)
Article
Engineering, Biomedical
Xianjin Dai, Yang Lei, Tonghe Wang, Anees H. Dhabaan, Mark McDonald, Jonathan J. Beitler, Walter J. Curran, Jun Zhou, Tian Liu, Xiaofeng Yang
Summary: The study aims to develop a fully automated approach for rapid and accurate multi-organ contouring in head-and-neck cancer patients using synthetic MRI and CBCT technology. By combining the information provided by MRI and CBCT, accurate multi-organ segmentation in HN cancer patients is expected. The proposed method shows promising results in terms of DSC values and can be a valuable tool for adaptive radiation therapy.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Xianjin Dai, Yang Lei, Tonghe Wang, Marian Axente, Dong Xu, Pretesh Patel, Ashesh B. Jani, Walter J. Curran, Tian Liu, Xiaofeng Yang
Summary: A deep learning-based algorithm was proposed to reconstruct high-resolution 3D US images from sparsely acquired 2D images, achieving significant improvement in through-plane resolution in breast cancer and prostate cancer cases. The method showed better performance compared to bicubic interpolation, demonstrating the potential for accelerating HR US imaging.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xianjin Dai, Yang Lei, Tonghe Wang, Jun Zhou, Justin Roper, Mark McDonald, Jonathan J. Beitler, Walter J. Curran, Tian Liu, Xiaofeng Yang
Summary: A deep learning-based automated OAR delineation method was developed in this study, utilizing synthetic MRI to enhance delineation accuracy. The proposed method outperformed current state-of-the-art algorithms in quantitatively evaluating OAR delineation performance on both in-house and public datasets.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xianjin Dai, Yang Lei, Justin Roper, Yue Chen, Jeffrey D. Bradley, Walter J. Curran, Tian Liu, Xiaofeng Yang
Summary: A novel motion tracking algorithm using US images based on modern deep learning techniques has been developed in this study, showing potential for real-time millimeter-level tumor motion prediction in radiation therapy.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xianjin Dai, Yang Lei, Jacob Wynne, James Janopaul-Naylor, Tonghe Wang, Justin Roper, Walter J. Curran, Tian Liu, Pretesh Patel, Xiaofeng Yang
Summary: This study introduced a deep learning-based rapid multiorgan delineation method for CBCT-guided adaptive pancreatic radiotherapy, which involved generating synthetic CT images and using the MS R-CNN model for final segmentation. The proposed method demonstrated significantly improved accuracy in delineating multiple OARs compared to competing methods.
Article
Engineering, Biomedical
Xianjin Dai, Yang Lei, Tonghe Wang, Jun Zhou, Soumon Rudra, Mark McDonald, Walter J. Curran, Tian Liu, Xiaofeng Yang
Summary: This study develops a deep-learning-based automated multi-organ segmentation method using a novel R-CNN architecture, which can accurately and quickly delineate organ-at-risk in head-and-neck cancer radiotherapy, saving labor and time.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yang Lei, Yabo Fu, Zhen Tian, Tonghe Wang, Xianjin Dai, Justin Roper, David S. Yu, Mark McDonald, Jeffrey D. Bradley, Tian Liu, Jun Zhou, Xiaofeng Yang
Summary: In this study, a deep learning-based method was developed for automatic deformable registration to align the pCT and the QA CT. The proposed dual-feasible framework, implemented by a mutual network, was trained to predict two deformation vector fields simultaneously to register the pCT and QA CT in both directions. Results showed significant improvement in registration accuracy and demonstrate the feasibility and efficacy of the proposed method for pCT and QA CT DIR.
