生物医学工程学杂志最新文献_第6页

[Visual object detection system based on augmented reality and steady-state visual evoked potential]. [基于增强现实和稳态视觉诱发电位的视觉物体检测系统]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202403041

Meng'ao Guo, Banghua Yang, Yiting Geng, Rongxin Jie, Yonghuai Zhang, Yanyan Zheng

{"title":"[Visual object detection system based on augmented reality and steady-state visual evoked potential].","authors":"Meng'ao Guo, Banghua Yang, Yiting Geng, Rongxin Jie, Yonghuai Zhang, Yanyan Zheng","doi":"10.7507/1001-5515.202403041","DOIUrl":"10.7507/1001-5515.202403041","url":null,"abstract":"This study investigates a brain-computer interface (BCI) system based on an augmented reality (AR) environment and steady-state visual evoked potentials (SSVEP). The system is designed to facilitate the selection of real-world objects through visual gaze in real-life scenarios. By integrating object detection technology and AR technology, the system augmented real objects with visual enhancements, providing users with visual stimuli that induced corresponding brain signals. SSVEP technology was then utilized to interpret these brain signals and identify the objects that users focused on. Additionally, an adaptive dynamic time-window-based filter bank canonical correlation analysis was employed to rapidly parse the subjects' brain signals. Experimental results indicated that the system could effectively recognize SSVEP signals, achieving an average accuracy rate of 90.6% in visual target identification. This system extends the application of SSVEP signals to real-life scenarios, demonstrating feasibility and efficacy in assisting individuals with mobility impairments and physical disabilities in object selection tasks.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"684-691"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366478/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Research progress on colorectal cancer identification based on convolutional neural network]. [基于卷积神经网络的大肠癌识别研究进展]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202310027

Xingliang Pan, Ke Tong, Chengdong Yan, Jinlong Luo, Hua Yang, Jurong Ding

引用次数: 0

[The supernumerary robotic limbs of brain-computer interface based on asynchronous steady-state visual evoked potential]. [基于异步稳态视觉诱发电位的脑机接口编外机械肢体]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202312056

Ping Xie, Yandi Men, Jiale Zhen, Xiening Shao, Jing Zhao, Xiaoling Chen

{"title":"[The supernumerary robotic limbs of brain-computer interface based on asynchronous steady-state visual evoked potential].","authors":"Ping Xie, Yandi Men, Jiale Zhen, Xiening Shao, Jing Zhao, Xiaoling Chen","doi":"10.7507/1001-5515.202312056","DOIUrl":"10.7507/1001-5515.202312056","url":null,"abstract":"Brain-computer interface (BCI) based on steady-state visual evoked potential (SSVEP) have attracted much attention in the field of intelligent robotics. Traditional SSVEP-based BCI systems mostly use synchronized triggers without identifying whether the user is in the control or non-control state, resulting in a system that lacks autonomous control capability. Therefore, this paper proposed a SSVEP asynchronous state recognition method, which constructs an asynchronous state recognition model by fusing multiple time-frequency domain features of electroencephalographic (EEG) signals and combining with a linear discriminant analysis (LDA) to improve the accuracy of SSVEP asynchronous state recognition. Furthermore, addressing the control needs of disabled individuals in multitasking scenarios, a brain-machine fusion system based on SSVEP-BCI asynchronous cooperative control was developed. This system enabled the collaborative control of wearable manipulator and robotic arm, where the robotic arm acts as a \"third hand\", offering significant advantages in complex environments. The experimental results showed that using the SSVEP asynchronous control algorithm and brain-computer fusion system proposed in this paper could assist users to complete multitasking cooperative operations. The average accuracy of user intent recognition in online control experiments was 93.0%, which provides a theoretical and practical basis for the practical application of the asynchronous SSVEP-BCI system.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"664-672"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366470/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Virtual reality-brain computer interface hand function enhancement rehabilitation system incorporating multi-sensory stimulation]. [结合多感官刺激的虚拟现实-脑计算机接口手功能增强康复系统]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202312055

Xiening Shao, Yiying Zhang, Dong Zhang, Yandi Men, Zilong Wang, Xiaoling Chen, Ping Xie

{"title":"[Virtual reality-brain computer interface hand function enhancement rehabilitation system incorporating multi-sensory stimulation].","authors":"Xiening Shao, Yiying Zhang, Dong Zhang, Yandi Men, Zilong Wang, Xiaoling Chen, Ping Xie","doi":"10.7507/1001-5515.202312055","DOIUrl":"10.7507/1001-5515.202312055","url":null,"abstract":"Stroke is an acute cerebrovascular disease in which sudden interruption of blood supply to the brain or rupture of cerebral blood vessels cause damage to brain cells and consequently impair the patient's motor and cognitive abilities. A novel rehabilitation training model integrating brain-computer interface (BCI) and virtual reality (VR) not only promotes the functional activation of brain networks, but also provides immersive and interesting contextual feedback for patients. In this paper, we designed a hand rehabilitation training system integrating multi-sensory stimulation feedback, BCI and VR, which guides patients' motor imaginations through the tasks of the virtual scene, acquires patients' motor intentions, and then carries out human-computer interactions under the virtual scene. At the same time, haptic feedback is incorporated to further increase the patients' proprioceptive sensations, so as to realize the hand function rehabilitation training based on the multi-sensory stimulation feedback of vision, hearing, and haptic senses. In this study, we compared and analyzed the differences in power spectral density of different frequency bands within the EEG signal data before and after the incorporation of haptic feedback, and found that the motor brain area was significantly activated after the incorporation of haptic feedback, and the power spectral density of the motor brain area was significantly increased in the high gamma frequency band. The results of this study indicate that the rehabilitation training of patients with the VR-BCI hand function enhancement rehabilitation system incorporating multi-sensory stimulation can accelerate the two-way facilitation of sensory and motor conduction pathways, thus accelerating the rehabilitation process.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"656-663"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366477/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Numerical study of the effect of geometrical parameters of straight impellers on the flow and hemolysis performance of centrifugal blood pumps]. [直叶轮几何参数对离心血泵流量和溶血性能影响的数值研究]。

生物医学工程学杂志 Pub Date : 2024-06-25 DOI: 10.7507/1001-5515.202311015

Dongmei Huang, Siheng Xiong, Yuan Xiao, Jinyang Wang, Guomin Cui

{"title":"[Numerical study of the effect of geometrical parameters of straight impellers on the flow and hemolysis performance of centrifugal blood pumps].","authors":"Dongmei Huang, Siheng Xiong, Yuan Xiao, Jinyang Wang, Guomin Cui","doi":"10.7507/1001-5515.202311015","DOIUrl":"10.7507/1001-5515.202311015","url":null,"abstract":"Red blood cells are destroyed when the shear stress in the blood pump exceeds a threshold, which in turn triggers hemolysis in the patient. The impeller design of centrifugal blood pumps significantly influences the hydraulic characteristics and hemolytic properties of these devices. Based on this premise, the present study employs a multiphase flow approach to numerically simulate centrifugal blood pumps, investigating the performance of pumps with varying numbers of blades and blade deflection angles. This analysis encompassed the examination of flow field characteristics, hydraulic performance, and hemolytic potential. Numerical results indicated that the concentration of red blood cells and elevated shear stresses primarily occurred at the impeller and volute tongue, which drastically increased the risk of hemolysis in these areas. It was found that increasing the number of blades within a certain range enhanced the hydraulic performance of the pump but also raised the potential for hemolysis. Moreover, augmenting the blade deflection angle could improve the hemolytic performance, particularly in pumps with a higher number of blades. The findings from this study can provide valuable insights for the structural improvement and performance enhancement of centrifugal blood pumps.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 3","pages":"577-583"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208646/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141459734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[An identification method of chromatin topological associated domains based on spatial density clustering]. [基于空间密度聚类的染色质拓扑关联域识别方法]。

生物医学工程学杂志 Pub Date : 2024-06-25 DOI: 10.7507/1001-5515.202311059

Haiyan Gong, Sichen Zhang, Xiaotong Zhang

{"title":"[An identification method of chromatin topological associated domains based on spatial density clustering].","authors":"Haiyan Gong, Sichen Zhang, Xiaotong Zhang","doi":"10.7507/1001-5515.202311059","DOIUrl":"10.7507/1001-5515.202311059","url":null,"abstract":"The rapid development of high-throughput chromatin conformation capture (Hi-C) technology provides rich genomic interaction data between chromosomal loci for chromatin structure analysis. However, existing methods for identifying topologically associated domains (TADs) based on Hi-C data suffer from low accuracy and sensitivity to parameters. In this context, a TAD identification method based on spatial density clustering was designed and implemented in this paper. The method preprocessed the raw Hi-C data to obtain normalized Hi-C contact matrix data. Then, it computed the distance matrix between loci, generated a reachability graph based on the core distance and reachability distance of loci, and extracted clustering clusters. Finally, it extracted TAD boundaries based on clustering results. This method could identify TAD structures with higher coherence, and TAD boundaries were enriched with more ChIP-seq factors. Experimental results demonstrate that our method has advantages such as higher accuracy and practical significance in TAD identification.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 3","pages":"552-559"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208664/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141459726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Research of electrical impedance tomography based on multilayer artificial neural network optimized by Hadamard product for human-chest models]. [基于哈达玛德积优化的多层人工神经网络的人体胸部模型电阻抗断层扫描研究]。

生物医学工程学杂志 Pub Date : 2024-06-25 DOI: 10.7507/1001-5515.202305047

Zhenzhong Song, Jianping Li, Jianming Wen, Nen Wan, Jijie Ma, Yu Zhang, Yili Hu, Zengfeng Gao

{"title":"[Research of electrical impedance tomography based on multilayer artificial neural network optimized by Hadamard product for human-chest models].","authors":"Zhenzhong Song, Jianping Li, Jianming Wen, Nen Wan, Jijie Ma, Yu Zhang, Yili Hu, Zengfeng Gao","doi":"10.7507/1001-5515.202305047","DOIUrl":"10.7507/1001-5515.202305047","url":null,"abstract":"Electrical impedance tomography (EIT) is a non-radiation, non-invasive visual diagnostic technique. In order to improve the imaging resolution and the removing artifacts capability of the reconstruction algorithms for electrical impedance imaging in human-chest models, the HMANN algorithm was proposed using the Hadamard product to optimize multilayer artificial neural networks (MANN). The reconstructed images of the HMANN algorithm were compared with those of the generalized vector sampled pattern matching (GVSPM) algorithm, truncated singular value decomposition (TSVD) algorithm, backpropagation (BP) neural network algorithm, and traditional MANN algorithm. The simulation results showed that the correlation coefficient of the reconstructed images obtained by the HMANN algorithm was increased by 17.30% in the circular cross-section models compared with the MANN algorithm. It was increased by 13.98% in the lung cross-section models. In the lung cross-section models, some of the correlation coefficients obtained by the HMANN algorithm would decrease. Nevertheless, the HMANN algorithm retained the image information of the MANN algorithm in all models, and the HMANN algorithm had fewer artifacts in the reconstructed images. The distinguishability between the objects and the background was better compared with the traditional MANN algorithm. The algorithm could improve the correlation coefficient of the reconstructed images, and effectively remove the artifacts, which provides a new direction to effectively improve the quality of the reconstructed images for EIT.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 3","pages":"439-446"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208659/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141459737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Dielectric properties of tidal volume changes in rabbit lung tissue in the 100 MHz~1 GHz band]. [100 MHz~1 GHz 频段兔肺组织潮气量变化的介电特性]。

生物医学工程学杂志 Pub Date : 2024-06-25 DOI: 10.7507/1001-5515.202312044

Yangchun Qin, Liang Zhang, Yifan Liu, Feng Fu, Bin Yang, Lin Yang, Xuechao Liu, Meng Dai

{"title":"[Dielectric properties of tidal volume changes in rabbit lung tissue in the 100 MHz~1 GHz band].","authors":"Yangchun Qin, Liang Zhang, Yifan Liu, Feng Fu, Bin Yang, Lin Yang, Xuechao Liu, Meng Dai","doi":"10.7507/1001-5515.202312044","DOIUrl":"10.7507/1001-5515.202312044","url":null,"abstract":"This paper investigates the variation of lung tissue dielectric properties with tidal volume under in vivo conditions to provide reliable and valid a priori information for techniques such as microwave imaging. In this study, the dielectric properties of the lung tissue of 30 rabbits were measured in vivo using the open-end coaxial probe method in the frequency band of 100 MHz to 1 GHz, and 6 different sets of tidal volumes (30, 40, 50, 60, 70, 80 mL) were set up to study the trends of the dielectric properties, and the data at 2 specific frequency points (433 and 915 MHz) were analyzed statistically. It was found that the dielectric coefficient and conductivity of lung tissue tended to decrease with increasing tidal volume in the frequency range of 100 MHz to 1 GHz, and the differences in the dielectric properties of lung tissue for the 6 groups of tidal volumes at 2 specific frequency points were statistically significant. This paper showed that the dielectric properties of lung tissue tend to vary non-linearly with increasing tidal volume. Based on this, more accurate biological tissue parameters can be provided for bioelectromagnetic imaging techniques such as microwave imaging, which could provide a scientific basis and experimental data support for the improvement of diagnostic methods and equipment for lung diseases.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 3","pages":"447-454"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208654/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141459729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Pulmonary PET /CT image instance segmentation based on dense interactive feature fusion Mask RCNN]. [基于密集交互式特征融合 Mask RCNN 的肺 PET /CT 图像实例分割]。

生物医学工程学杂志 Pub Date : 2024-06-25 DOI: 10.7507/1001-5515.202309026

Tao Zhou, Yanan Zhao, Huiling Lu, Yaxing Wang, Lijia Zhi

{"title":"[Pulmonary PET /CT image instance segmentation based on dense interactive feature fusion Mask RCNN].","authors":"Tao Zhou, Yanan Zhao, Huiling Lu, Yaxing Wang, Lijia Zhi","doi":"10.7507/1001-5515.202309026","DOIUrl":"10.7507/1001-5515.202309026","url":null,"abstract":"There are some problems in positron emission tomography/ computed tomography (PET/CT) lung images, such as little information of feature pixels in lesion regions, complex and diverse shapes, and blurred boundaries between lesions and surrounding tissues, which lead to inadequate extraction of tumor lesion features by the model. To solve the above problems, this paper proposes a dense interactive feature fusion Mask RCNN (DIF-Mask RCNN) model. Firstly, a feature extraction network with cross-scale backbone and auxiliary structures was designed to extract the features of lesions at different scales. Then, a dense interactive feature enhancement network was designed to enhance the lesion detail information in the deep feature map by interactively fusing the shallowest lesion features with neighboring features and current features in the form of dense connections. Finally, a dense interactive feature fusion feature pyramid network (FPN) network was constructed, and the shallow information was added to the deep features one by one in the bottom-up path with dense connections to further enhance the model's perception of weak features in the lesion region. The ablation and comparison experiments were conducted on the clinical PET/CT lung image dataset. The results showed that the APdet, APseg, APdet_s and APseg_s indexes of the proposed model were 67.16%, 68.12%, 34.97% and 37.68%, respectively. Compared with Mask RCNN (ResNet50), APdet and APseg indexes increased by 7.11% and 5.14%, respectively. DIF-Mask RCNN model can effectively detect and segment tumor lesions. It provides important reference value and evaluation basis for computer-aided diagnosis of lung cancer.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 3","pages":"527-534"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208663/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141459736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Research on intelligent tooth segmentation method combining multiple seed region growth and boundary extension]. [多种子区域生长与边界扩展相结合的智能牙齿分割方法研究]。

生物医学工程学杂志 Pub Date : 2024-06-25 DOI: 10.7507/1001-5515.202309030

Zhihua Liu, Jiutao Xue, Hao Tang, Yuhe Liao

{"title":"[Research on intelligent tooth segmentation method combining multiple seed region growth and boundary extension].","authors":"Zhihua Liu, Jiutao Xue, Hao Tang, Yuhe Liao","doi":"10.7507/1001-5515.202309030","DOIUrl":"10.7507/1001-5515.202309030","url":null,"abstract":"The segmentation of dental models is a crucial step in computer-aided diagnosis and treatment systems for oral healthcare. To address the issues of poor universality and under-segmentation in tooth segmentation techniques, an intelligent tooth segmentation method combining multiple seed region growth and boundary extension is proposed. This method utilized the distribution characteristics of negative curvature meshes in teeth to obtain new seed points and effectively adapted to the structural differences between the top and sides of teeth through differential region growth. Additionally, the boundaries of the initial segmentation were extended based on geometric features, which was effectively compensated for under-segmentation issues in region growth. Ablation experiments and comparative experiments with current state-of-the-art algorithms demonstrated that the proposed method achieved better segmentation of crowded dental models and exhibited strong algorithm universality, thus possessing the capability to meet the practical segmentation needs in oral healthcare.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 3","pages":"520-526"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208652/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141459738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0