检索结果-内蒙古大学图书馆

Design and simulation of a 2-D array flexible ultrasound transducer system for tissue characterization-A pilot study

引用

Medicine in Novel Technology and Devices 2022年第1期13卷 59-64页

作者： Zhihua Gan Brian Guo Jiqi Cheng Yi-Xian Qin Department of Biomedical Engineering Stony Brook UniversityStony BrookNY11794USA Department of Electrical and Computer Engineering Stony Brook UniversityStony BrookNY11794USA

Noninvasive diagnosis of bone density and mechanical properties using non-radiation imaging modality is an emerging area with promising in early prediction of osteopenia and treatment effectiveness in the clinic and functional disuse,i.e.,long-term bedrest and space *** in quantitative ultrasound have shown advantages in measuring both bone density and mechanical strength,non-radiation,imaging capability,and easy to *** challenge that remained is the poor penetration of ultrasound signals passing through trabecular and cortical bones and acoustic energy scattering.A new scanning confocal ultrasound technology is developed in this lab to detect the alteration of bone to provide diagnostic results in bone density and structure properties.A software-controlled flexible ultrasound system with 2-D dual array transducer is developed and proposed for the purpose of noninvasive bone density diagnosis and assessment of bone ***(Tx)transducer elements are divided into sub-blocks to excite the ultrasound signals in sequence to decrease the system complexity while maintaining beam pattern properties by the signal processing procedure at receiving(Rx)*** is also applied to reduce acoustic side lobes and to make the resolution in the ultrasound field of view(FOV)more *** study may provide basic understanding of modulated confocal ultrasound beam forming for tissue characterization,such as trabecular bone structual and strength properties.

关键词： Flexible ultrasound system Noninvasive diagnostic imaging Sub-block triggering Ultrasound imaging resolution Apodization Quantitative ultrasound Trabecular bone property Scanning ultrasound Bone density and strength

来源：评论

学校读者我要写书评

暂无评论

10-point connector formed by two snap buttons

10-point connector formed by two snap buttons

引用

2024 IEEE International Conference on Consumer Electronics, ICCE 2024

作者： Yang, Chang-Ming Wu, Shu-Cing Kao, Rally Liao, Kuo-Cheng Wu, Ze-We Chen, Shih-Hung Chen, Chi-Chun Ming Young Biomedical Corp Miaoli Taiwan National Chin-Yi University of Technology Program Prospective Technology of Electrical Engineering and Computer Science Taichung Taiwan Bonanza Biotechnology Co.Ltd National Chin-Yi University of Technology Dept. of Computer Science and Information Engineering Taichung Taiwan National Chin-Yi University of Technology Dept. of Electronic Engineering Taichung Taiwan

ISBN: (纸本)9798350324136

With the rapid advancement of electronic textiles, the design and integration of connectors have emerged as pivotal challenges. This study emphasizes the development of a connection solution that amalgamates miniaturization, efficiency, and reliability, specifically tailored for Flexible Conductive Silicone Circuits. A diversified connection scheme is proposed, incorporating elements such as snaps, Pogo pins, and conductive hook-and-loop fasteners, thereby achieving an innovative and pragmatic design. Through meticulous manufacturing processes, including the utilization of hot-melt adhesive, PET films, conductive fabric, and other multilayer materials, a connection system with low impedance and commendable conductivity was successfully engineered. Impedance test outcomes have indicated that the resistance at each connection point is less than 0.7 ohms, substantiating its superior electrical properties. In terms of assembly, this research demonstrates the precise interconnection of the controller and conductive fabric circuit, ensured by metal pin technology, leading to connection stability. This solution not only furnishes appropriate connection technology for specific application scenarios but also opens new avenues and directions for connection design within the domain of electronic textiles. © 2024 IEEE.

关键词： Connectors E-Textiles Flexible Conductive Silicone Circuit PET films

来源：评论

学校读者我要写书评

暂无评论

An Optimized Algorithm for CR-MIMO Wireless Networks

引用

computers, Materials & Continua 2022年第4期71卷 697-715页

作者： Imran Khan Fahd N.Al-Wesabi Marwa Obayya Anwer Mustafa Hilal Manar Ahmed Hamza Mohammed Rizwanullah Fahad Ahmed Al-Zahrani Hirofumi Amano Samih M.Mostafa Department of Electrical Engineering University of Engineering&TechnologyPeshawarPakistan Department of Computer Science King Khalid UniversityMuhayel AseerKSA Department of Biomedical Engineering College of EngineeringPrincess Nourah bint Abdulrahman UniversitySaudi Arabia Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia Computer Engineering Department Umm Al-Qura UniversityMecca24381Saudi Arabia Research Institute for Information Technology Kyushu UniversityFukuoka819-0395Japan Computer Science-Mathematics Department Faculty of ScienceSouth Valley UniversityQena83523Egypt

With the rapid development of wireless communication technology,the spectrum resources are increasingly strained which needs optimal *** radio(CR)is one of the key technologies to solve this *** sensing not only includes the precise detection of the communication signal of the primary user(PU),but also the precise identification of its modulation type,which can then determine the a priori information such as the PU’service category,so as to use this information to make the cognitive user(CU)aware to discover and use the idle spectrum more effectively,and improve the spectrum *** sensing is the primary feature and core part of *** sensing algorithms includes energy detection,cyclostationary feature detection,matched filter detection,and so *** energy detection algorithm has a simple structure and does not require prior knowledge of the PU transmitter signal,but it is easily affected by noise and the threshold is not easy to *** combination of multiple-input multiple-output(MIMO)with CR improves the spectral efficiency and multipath fading *** best utilize the PU spectrum while minimizing the overall transmit power,an iterative technique based on semidefinite programming(SDP)and minimum mean squared error(MMSE)is ***,this article proposed a new method for max-min fairness *** compared to existing algorithms,the simulation results show that the proposed algorithms perform better in terms of total transmitted power and signal-tointerference plus noise ratio(SINR).Furthermore,the proposed algorithm effectively improved the system performance in terms of number of iterations,interference temperature threshold and balance SINR level which makes it superior over the conventional schemes.

关键词： Cognitive radio spectrum utilization bandwidth primary user

来源：评论

学校读者我要写书评

暂无评论

Development of a Smart IoT-based Dustbin Level Monitoring System 2

Development of a Smart IoT-based Dustbin Level Monitoring Sy...

引用

2nd International Conference Computational and Characterization Techniques in engineering and Sciences, IC3TES 2024

作者： Salau, Ayodeji Olalekan Miyenseigha Marvellous, Timothy-Jacob Gupta, Shashi Kant Zywiolek, Justyna Onibonoje, Moses Oluwafemi Kishore Kanna, R. Afe Babalola University Department of Electrical/Electronics and Computer Engineering Ado-Ekiti Nigeria Saveetha Institute of Medical and Technical Sciences Saveetha School of Engineering Tamil Nadu Chennai India Eudoxia Research University Department of Computer Science and Engineering United States Czestochowa University of Technology Czestochowa Poland Vel Tech Rangarajan Dr. Sagunthala R&d Institute of Science and Technology Department of Biomedical Engineering Chennai India

ISBN: (纸本)9798350364699

In recent times, the exponential rise in waste output has become a major worldwide problem, resulting in dirty environments, unpleasant aromas, and the spread of diseases in cities and public spaces. Traditional waste management strategies have been ineffectual in dealing with this issue. This paper therefore presents the design and construction of a smart waste bin that aims to streamline waste management procedures, reduce manual labor, and mitigate the associated costs. The proposed system utilizes various components such as PIR sensor, ultrasonic sensor, servo motor, buzzer, SIM800l GSM module, LCD display, and Arduino UNO microcontroller. The proposed system also uses a level indicator that communicates with an authorized personnel indicating the amount of waste in the bin at certain thresholds. If the proposed smart dustbins are widely adopted, replacing our current traditional dustbins, garbage can be effectively handled. The designed system was tested and found to function in accordance with the study's objectives. © 2024 IEEE.

关键词： Ultrasonic sensors

来源：评论

学校读者我要写书评

暂无评论

Deep learning model for pleural effusion detection via active learning and pseudo-labeling: a multisite study

引用

BMC Medical Imaging 2024年第1期24卷 92页

作者： Chang, Joseph Lin, Bo-Ru Wang, Ti-Hao Chen, Chung-Ming Department of Biomedical Engineering College of Medicine and College of Engineering National Taiwan University No. 1 Sec. 1 Jen-Ai Road Taipei 100 Taipei 100 Taiwan EverFortune.AI Co. Ltd Taichung Taiwan The Data Science Degree Program College of Electrical Engineering and Computer Science National Taiwan University and Academia Sinica Taipei Taiwan Department of Radiation Oncology China Medical University Hospital Taichung Taiwan Department of Medicine China Medical University Taichung Taiwan

Background: The study aimed to develop and validate a deep learning-based computer Aided Triage (CADt) algorithm for detecting pleural effusion in chest radiographs using an active learning (AL) framework. This is aimed at addressing the critical need for a clinical grade algorithm that can timely diagnose pleural effusion, which affects approximately 1.5 million people annually in the United States. Methods: In this multisite study, 10,599 chest radiographs from 2006 to 2018 were retrospectively collected from an institution in Taiwan to train the deep learning algorithm. The AL framework utilized significantly reduced the need for expert annotations. For external validation, the algorithm was tested on a multisite dataset of 600 chest radiographs from 22 clinical sites in the United States and Taiwan, which were annotated by three U.S. board-certified radiologists. Results: The CADt algorithm demonstrated high effectiveness in identifying pleural effusion, achieving a sensitivity of 0.95 (95% CI: [0.92, 0.97]) and a specificity of 0.97 (95% CI: [0.95, 0.99]). The area under the receiver operating characteristic curve (AUC) was 0.97 (95% DeLong’s CI: [0.95, 0.99]). Subgroup analyses showed that the algorithm maintained robust performance across various demographics and clinical settings. Conclusion: This study presents a novel approach in developing clinical grade CADt solutions for the diagnosis of pleural effusion. The AL-based CADt algorithm not only achieved high accuracy in detecting pleural effusion but also significantly reduced the workload required for clinical experts in annotating medical data. This method enhances the feasibility of employing advanced technological solutions for prompt and accurate diagnosis in medical settings. © The Author(s) 2024.

关键词： Active learning Chest radiographs Deep learning Pleural effusion X-rays

来源：评论

学校读者我要写书评

暂无评论

Multimodal optical coherence tomography and two-photon selective-plane illumination microscopy for embryonic imaging 18

Multimodal optical coherence tomography and two-photon selec...

引用

Multimodal biomedical Imaging XVIII 2023

作者： Karim, Md Mobarak Sun, Ruijiao Khajavi, Behzad Singh, Manmohan Chawla, Harshdeep S. Ambekar, Yogeshwari S. Schill, Alexander W. Mayerich, David Dickinson, Mary E. Larin, Kirill V. Department of Biomedical Engineering University of Houston HoustonTX United States Department of Electrical and Computer Engineering University of Houston HoustonTX United States Department of Molecular Physiology and Biophysics Baylor College of Medicine HoustonTX United States

ISBN: (纸本)9781510658479

Fluorescent two-photon selective-plane illumination microscopy (2P-SPIM) enables deep imaging of cellular information such as proliferation, type identification, and signaling using fluorescence. Optical coherence tomography (OCT) can capture complementary structural information based on intrinsic optical scattering. We developed a specialized multimodal high-resolution embryonic imaging system combining the benefits of OCT with 2P-SPIM. The OCT and 2P-SPIM beams were optically co-aligned and scanned using the same scanners and the same objective lens. The resulting light sheet thickness was ~13 µm with a transverse resolution of ~2.1 µm. The OCT system was based on a 1050 nm centered swept source laser with a bandwidth of ~100 nm and a sweep rate of 100 kHz. The OCT system utilized a Michelson-style interferometer and had a lateral resolution of ~15 µm and an axial resolution of ~7 µm. The capabilities of the multimodal imaging system were demonstrated using images of fluorescent microbeads and a fluorescently tagged mouse embryo at gestational day 9.5. Due to the co-alignment of the OCT and 2P-SPIM systems, image registration was simple and allowed for high-throughput multimodal imaging without the use of sophisticated registration methods. © 2023 SPIE.

关键词： Optical tomography

来源：评论

学校读者我要写书评

暂无评论

Label Free Flow Cytometry Using Machine Learning 6

Label Free Flow Cytometry Using Machine Learning

引用

6th Annual IEEE Research and Applications of Photonics in Defense Conference, RAPID 2023

作者： Vandal, Noah Tida, Umamaheswa Rao Nawarathna, Dharmakeerthi North Dakota State University Department of Biomedical Engineering 1340 Administration Ave FargoND58108 United States North Dakota State University Department of Electrical and Computer Engineering 1340 Administration Ave FargoND58108 United States Old Dominion University Department of Electrical and Computer Engineering 5115 Hampton Blvd NorFolkVA23529 United States

ISBN: (纸本)9781665423526

关键词： Machine learning

来源：评论

学校读者我要写书评

暂无评论

Enhancing Adaptive Deep Brain Stimulation via Efficient Reinforcement Learning

Enhancing Adaptive Deep Brain Stimulation via Efficient Rein...

引用

IEEE International Conference on Mobile Cloud Computing, Services, and engineering (MobileCloud)

作者： Jessica Mehregan Xiaoyong Yuan Gaurav Bagwe Jacob Jackson Ezedin Mohammed Lan Zhang Chunxiu Yu Department of Biomedical Engineering Michigan Technological University Houghton MI Department of Electrical and Computer Engineering Clemson University Clemson SC Department of Electrical and Computer Engineering Michigan Technological University Houghton MI

ISBN: (数字)9798331539856

ISBN: (纸本)9798331539863

Parkinson’s disease (PD) is a progressive neurological disease primarily impacting movement. Deep brain stimulation (DBS) stands out as a potent therapeutic treatment for addressing PD’s motor symptoms. Nevertheless, optimizing DBS parameters to enhance both effectiveness and efficiency remains a significant challenge. Traditional DBS relies on high-frequency stimulation, lacking adaptability to adequately dress the dynamic nature of PD symptoms. In this paper, we develop a novel method to enhance adaptive DBS utilizing reinforcement learning (RL), while concurrently reducing computational costs through neural network quantization. Our approach entails the discretization of state and action spaces, representing the status of neurons within PD-associated brain regions and the corresponding stimulation patterns, respectively. The primary learning objective is to maximize the accumulated treatment reward, specifically reduced power in the beta frequency band, while maintaining a low stimulation frequency. Additionally, to enhance computing and inference efficiency, we integrate two types of neural network quantization approaches, post-training quantization (PTQ) and quantization-aware training (QAT), with the RL model. Experimental evaluations conducted within a computational model of PD demonstrate the efficacy of our RL approach, even after quantization. While quantization induces some alterations in RL model outputs, the overall DBS efficacy remains unaffected. Furthermore, the animal testing of a rat with PD confirms the effects on both animal behavior and neural activity, underscoring the potential of RL-based adaptive DBS as a promising avenue for personalized and optimized treatment of PD.

关键词： Training Adaptation models Quantization (signal) Computational modeling Biological system modeling Deep brain stimulation Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Comparison of Flexible Array with Laparoscopic Transducer for Photoacoustic-Guided Surgery

Comparison of Flexible Array with Laparoscopic Transducer fo...

引用

Photons Plus Ultrasound: Imaging and Sensing 2023

作者： Zhang, Jiaxin Wiacek, Alycen Feng, Ziwei Ding, Kai Lediju Bell, Muyinatu A. Department of Electrical and Computer Engineering Johns Hopkins University United States Department of Radiation Oncology and Molecular Radiation Sciences Johns Hopkins Medicine United States Department of Biomedical Engineering Johns Hopkins University United States Department of Computer Science Johns Hopkins University United States

ISBN: (纸本)9781510658639

Photoacoustic imaging has recently demonstrated strong viability to visualize tool tips and assist with guidance during surgeries and interventional procedures. The more conventional rigid ultrasound transducers that can be used to sense photoacoustic signals require applied pressure for complete tissue contact when placed on curved surfaces. However, emerging flexible arrays are better suited to conform to different anatomical geometries. This work presents photoacoustic images acquired with a conventional laparoscopic transducer and a more flexible transducer array when placed in contact with surfaces of different curvatures, providing quantitative comparisons of image quality and transducer characterization. An optical fiber was inserted and translated within hemispherical phantoms along each transducer’s elevation dimension to estimate the corresponding elevation field-of-view (FOV). A wider elevation FOV was measured with the flexible array, which indicates decreased elevation localization certainty, but increased ability to find tool tips when compared to the laparascopic probe. The average target depth accuracy was 99.36% with the flexible array and 95.05% with the laparoscopic probe, due to the differences in pressure required to maintain acoustic contact. Image contrast and signal-to-noise ratios were greater with the flexible array than with the laparoscopic probe. These properties of the flexible array enhance its desirability for photoacoustic-guided surgical interventions. © 2023 SPIE.

关键词： Probes

来源：评论

学校读者我要写书评

暂无评论

Development and characterization of thermoacoustic imaging system using rotational single element transducer

Development and characterization of thermoacoustic imaging s...

引用

Photons Plus Ultrasound: Imaging and Sensing 2023

作者： Islam, Md Tarikul Zafar, Mohsin Prakash, Ravi Manwar, Rayyan Erricolo, Danilo Lin, James Avanaki, Kamran The Richard and Loan Hill Department of Biomedical Engineering University of Illinois at Chicago Chicago United States Department of Electrical and Computer Engineering University of Illinois at Chicago Chicago United States Department of Dermatology University of Illinois at Chicago Chicago United States

ISBN: (纸本)9781510658639

Microwave-induced thermoacoustic tomography has the advantage of a high spatial resolution and a deep imaging depth. This method has been extensively explored over the past decade to find an alternative of existing imaging techniques. In this study, we have developed a compact microwave-induced thermoacoustic tomography (MI-TAT) with a waveguide antenna and a rotating ultrasound transducer unit. We performed a characterization study of the system in terms of pulse width, selection of microwave frequency and resolution. Then the optimized parameters were used to image in-vitro complex structure phantoms. Later, we expanded our system capability for spectroscopic study by imaging different concentrations of methanol and water to mimic the tissue properties and analyze them based on the absorption characteristics of these materials. We hope, this spectroscopic capability broadens the capability of thermoacoustic system to separate the diseased tissue from the healthy one (e.g., malignant from benign) with a high sensitivity and specificity. © 2023 SPIE.

关键词： Tomography

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：