2018 IEEE Biomedical Circuits and Systems Conference (BioCAS)最新文献_第6页

Continuous Blood Pressure Monitoring using Wrist-worn Bio-impedance Sensors with Wet Electrodes 使用带湿电极的腕戴式生物阻抗传感器进行连续血压监测

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584783

Bassem Ibrahim, R. Jafari

引用次数: 23

High pH Resolution Extended Gate Type pH Image Sensors with the Charge Accumulation Circuit 带电荷积累电路的高pH分辨率扩展门式pH图像传感器

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584779

Y. Arimi, Y. Kimura, Toshiki Wakamori, Hiroo Yamamoto, S. Mizuno, T. Iwata, Kazuhiro Takahashi, K. Sawada

{"title":"High pH Resolution Extended Gate Type pH Image Sensors with the Charge Accumulation Circuit","authors":"Y. Arimi, Y. Kimura, Toshiki Wakamori, Hiroo Yamamoto, S. Mizuno, T. Iwata, Kazuhiro Takahashi, K. Sawada","doi":"10.1109/BIOCAS.2018.8584779","DOIUrl":"https://doi.org/10.1109/BIOCAS.2018.8584779","url":null,"abstract":"In order to observe the pH distribution of biological cells, we propose a pH image sensor with a new structure enabling high density and high sensitivity imaging. In the new proposed pH image sensor we add the charge accumulation circuit to the conventional 2-Tr pixel structure. In the charge accumulation operation, the circuit amplifies a signal by repeatedly transferring the signal charge from the pixel to the capacitor and thus it is expected that the pH resolution can be improved from the viewpoint of Signal-Noise Ratio (SNR). Since the charge accumulation circuit is designed with three transistors and one capacitor and is arranged outside the pixel array, a new pH image sensor is designed without large increase in area. Image sensors with charge accumulation circuits were designed and fabricated. We evaluate the fabricated pH image sensors, observe sensor gain increased by the charge accumulation circuit and realized the performance that enabled pH imaging. From the measurement result, the input-referred sensor noise is reduced by 82% compared with the conventional 2- Tr pixel structure sensor. Therefore, it is possible to realize pH resolution less than 0.02pH.","PeriodicalId":259162,"journal":{"name":"2018 IEEE Biomedical Circuits and Systems Conference (BioCAS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122277885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Injection-Locked Power Oscillator for Resonance Frequency Tracking in Wireless Power Transfer 用于无线电力传输中谐振频率跟踪的注入锁定功率振荡器

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584843

Guangyin Feng, Ji-Jon Sit

引用次数: 2

A Mixed-Reality Training Environment for Upper Limb Prosthesis Control 面向上肢假肢控制的混合现实训练环境

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584739

Avinash Sharma, Christopher L. Hunt, Asheesh Maheshwari, Luke E. Osborn, G. Levay, R. Kaliki, A. Soares, N. Thakor

{"title":"A Mixed-Reality Training Environment for Upper Limb Prosthesis Control","authors":"Avinash Sharma, Christopher L. Hunt, Asheesh Maheshwari, Luke E. Osborn, G. Levay, R. Kaliki, A. Soares, N. Thakor","doi":"10.1109/BIOCAS.2018.8584739","DOIUrl":"https://doi.org/10.1109/BIOCAS.2018.8584739","url":null,"abstract":"Adjusting to an amputation can often times be difficult for the body. Post-surgery, amputees not only have to incur expensive rehabilitation treatment costs, but also have to wait for up to several months before receiving a properly fitted prosthesis. We developed a mixed-reality training environment where amputees can train, at their own time and convenience, and interact with holographic objects, while also receiving tactile and proprioceptive feedback. We incorporate positional information through inertial sensors, touch and proprioception information through vibrational feedback, all integrated into an augmented-reality (AR) environment viewed through the Microsoft HoloLens TM. Training tasks were designed to account for limb rotation and object relocation in a three-dimensional space with a correct palm orientation essential for an intuitive grasp and release of objects. Our results showed an improved performance in training time, overshoot and completion rate with vibratory feedback (of both touch and proprioception) over without feedback. Furthermore, EMG activity was analyzed to estimate the muscular effort during each task.","PeriodicalId":259162,"journal":{"name":"2018 IEEE Biomedical Circuits and Systems Conference (BioCAS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122909301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

A Compact, Low-Noise, Chopped Front-End for Peripheral Nerve Recording in 180 nm CMOS 一个紧凑，低噪音，切碎的前端记录周围神经在180纳米CMOS

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584716

Jialin Liu, Ross M. Walker

引用次数: 6

Live Demonstration: Miniaturized Compact NIRS probe based on SiPM and Pulsed VCSEL diode routes to wearable devices 现场演示:基于SiPM和脉冲VCSEL二极管的小型化紧凑型近红外探头到可穿戴设备的路线

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584748

Sreenil Saha, F. Lesage, M. Sawan

引用次数: 0

Image Enhancement Method Based on Adaptive Fraction Gamma Transformation and Color Restoration for Wireless Capsule Endoscopy 基于自适应分数伽玛变换和颜色恢复的无线胶囊内窥镜图像增强方法

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584793

Mingzhu Long, Zehua Lan, Xiang Xie, Guolin Li, Zhihua Wang

{"title":"Image Enhancement Method Based on Adaptive Fraction Gamma Transformation and Color Restoration for Wireless Capsule Endoscopy","authors":"Mingzhu Long, Zehua Lan, Xiang Xie, Guolin Li, Zhihua Wang","doi":"10.1109/BIOCAS.2018.8584793","DOIUrl":"https://doi.org/10.1109/BIOCAS.2018.8584793","url":null,"abstract":"Wireless capsule endoscopy (WCE) plays an important role in gastrointestinal (GI) tract observation and disease diagnosis. However, due to the limited illumination and complex environment in GI tract, endoscopic images are usually not clear enough to be interpreted by doctors or used for further processing. Although many algorithms have been proposed to improve image quality from different aspects, the balance of algorithm complexity and image quality is still a challenge worth exploring. In this paper, we propose a novel function named adaptive fraction gamma transformation (AFGT) to enhance the quality of images captured by the WCE. Characteristics of AFGT are adaptive to different luminance in an image and self-tunable to the statistical characteristics of different images. Besides, HSI color space is adopted for color restoration, namely, the saturation component is linearly scaled according to the enhanced intensity component. Experimental results show that performances of the proposed method in both visual quality and objective assessments are better than that of the state-of-art methods.","PeriodicalId":259162,"journal":{"name":"2018 IEEE Biomedical Circuits and Systems Conference (BioCAS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116012166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Flexible Ultra-resolution Subdermal EEG Probes 柔性超分辨率皮下脑电图探头

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584672

Zabir Ahmed, Jay W. Reddy, K. Deshpande, Ashwati Krishnan, Praveen Venkatesh, S. Kelly, P. Grover, M. Chamanzar

{"title":"Flexible Ultra-resolution Subdermal EEG Probes","authors":"Zabir Ahmed, Jay W. Reddy, K. Deshpande, Ashwati Krishnan, Praveen Venkatesh, S. Kelly, P. Grover, M. Chamanzar","doi":"10.1109/BIOCAS.2018.8584672","DOIUrl":"https://doi.org/10.1109/BIOCAS.2018.8584672","url":null,"abstract":"Scalp Electroencephalogram (EEG) is a popular, noninvasive method to record neural activity, commonly used in the clinical setting as a gold-standard for diagnosing many disorders, including epilepsy. The spatial resolution of scalp EEG is of critical concern for targeting surgical interventions and resultant patient outcomes. However, high-resolution spatial information is filtered and obscured by noise as electrical signals propagate through layers of tissue. We present a novel paradigm of high-density subdermal EEG arrays, capable of being implanted under the scalp to increase spatial resolution of EEG recordings while minimizing invasiveness compared to traditional implantable recording electrode arrays such as electrocorticography (ECoG) surface grids. In addition, our device can be chronically implanted, as opposed to traditional scalp EEG electrodes that need to be removed periodically for re-application of conductive electrode gel. We demonstrate the design, fabrication and electrical characterization of high-density subdermal EEG arrays realized in Parylene C polymer platform using an optimized microfabrication process. Devices are realized in a range of electrode diameters (200 microns – 1000 microns) and pitch (1 mm – 3.5 mm), to study the effects of electrode size and spacing on the spatial frequency content and redundancy of recorded neural signals. Electrochemical Impedance Spectroscopy (EIS) measurements, show an impedance of <10 kΩ (for 600 micron diameter) at 1 kHz. These high-density subdermal EEG probes will be used to validate our theoretical models of sampling and reconstructing neural activity from electric potentials.","PeriodicalId":259162,"journal":{"name":"2018 IEEE Biomedical Circuits and Systems Conference (BioCAS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115801216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A CMOS Perimeter Gated SPAD Based Digital Silicon Photomultiplier with Asynchronous AER Readout for PET Applications 一种基于CMOS周长门控SPAD的数字硅光电倍增管，具有异步AER读出，用于PET应用

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584722

Mst Shamim Ara Shawkat, N. Mcfarlane

引用次数: 7

Minimum Precision Requirements for Deep Learning with Biomedical Datasets 生物医学数据集深度学习的最低精度要求

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2018-10-01 DOI: 10.1109/BIOCAS.2018.8584732

Charbel Sakr, Naresh R Shanbhag

引用次数: 2