生物医学工程学杂志最新文献_第9页

[Feature detection of B-ultrasound images of intussusception in children based on improved YOLOv8n]. [基于改进型 YOLOv8n 的儿童肠套叠 B 超图像特征检测]。

生物医学工程学杂志 Pub Date : 2024-10-25 DOI: 10.7507/1001-5515.202401017

Chenyu Liu, Jian Xu, Ke Li, Lu Wang

{"title":"[Feature detection of B-ultrasound images of intussusception in children based on improved YOLOv8n].","authors":"Chenyu Liu, Jian Xu, Ke Li, Lu Wang","doi":"10.7507/1001-5515.202401017","DOIUrl":"10.7507/1001-5515.202401017","url":null,"abstract":"To assist grassroots sonographers in accurately and rapidly detecting intussusception lesions from children's abdominal ultrasound images, this paper proposes an improved YOLOv8n children's intussusception detection algorithm, called EMC-YOLOv8n. Firstly, the EfficientViT network with a cascaded group attention module was used as the backbone network to enhance the speed of target detection. Secondly, the improved C2fMBC module was used to replace the C2f module in the neck network to reduce network complexity, and the coordinate attention (CA) module was introduced after each C2fMBC module to enhance attention to positional information. Finally, experiments were conducted on the self-built dataset of intussusception in children. The results showed that the recall rate, average detection accuracy (mAP@0.5) and precision of the EMC-YOLOv8n algorithm improved by 3.9%, 2.1% and 0.9%, respectively, compared to the baseline algorithm. Despite slightly increased network parameters and computational load, significant improvements in detection accuracy enable efficient completion of detection tasks, demonstrating substantial economic and social value.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 5","pages":"903-910"},"PeriodicalIF":0.0,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11527744/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142509894","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 emerging discipline: brain-computer interfaces medicine]. [新兴学科：脑机接口医学]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202310028

Yanxiao Chen, Zhe Zhang, Fan Wang, Peng Ding, Lei Zhao, Yunfa Fu

{"title":"[An emerging discipline: brain-computer interfaces medicine].","authors":"Yanxiao Chen, Zhe Zhang, Fan Wang, Peng Ding, Lei Zhao, Yunfa Fu","doi":"10.7507/1001-5515.202310028","DOIUrl":"10.7507/1001-5515.202310028","url":null,"abstract":"With the development of brain-computer interface (BCI) technology and its translational application in clinical medicine, BCI medicine has emerged, ushering in profound changes to the practice of medicine, while also bringing forth a series of ethical issues related to BCI medicine. BCI medicine is progressively emerging as a new disciplinary focus, yet to date, there has been limited literature discussing it. Therefore, this paper focuses on BCI medicine, firstly providing an overview of the main potential medical applications of BCI technology. It then defines the discipline, outlines its objectives, methodologies, potential efficacy, and associated translational medical research. Additionally, it discusses the ethics associated with BCI medicine, and introduces the standardized operational procedures for BCI medical applications and the methods for evaluating the efficacy of BCI medical applications. Finally, it anticipates the challenges and future directions of BCI medicine. In the future, BCI medicine may become a new academic discipline or major in higher education. In summary, this article is hoped to provide thoughts and references for the development of the discipline of BCI medicine.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"641-649"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366471/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113070","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

[A deep transfer learning approach for cross-subject recognition of mental tasks based on functional near-infrared spectroscopy]. [基于功能性近红外光谱的跨主体心理任务识别深度迁移学习方法]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202310002

Yao Zhang, Dongyuan Liu, Feng Gao

{"title":"[A deep transfer learning approach for cross-subject recognition of mental tasks based on functional near-infrared spectroscopy].","authors":"Yao Zhang, Dongyuan Liu, Feng Gao","doi":"10.7507/1001-5515.202310002","DOIUrl":"10.7507/1001-5515.202310002","url":null,"abstract":"In the field of brain-computer interfaces (BCIs) based on functional near-infrared spectroscopy (fNIRS), traditional subject-specific decoding methods suffer from the limitations of long calibration time and low cross-subject generalizability, which restricts the promotion and application of BCI systems in daily life and clinic. To address the above dilemma, this study proposes a novel deep transfer learning approach that combines the revised inception-residual network (rIRN) model and the model-based transfer learning (TL) strategy, referred to as TL-rIRN. This study performed cross-subject recognition experiments on mental arithmetic (MA) and mental singing (MS) tasks to validate the effectiveness and superiority of the TL-rIRN approach. The results show that the TL-rIRN significantly shortens the calibration time, reduces the training time of the target model and the consumption of computational resources, and dramatically enhances the cross-subject decoding performance compared to subject-specific decoding methods and other deep transfer learning methods. To sum up, this study provides a basis for the selection of cross-subject, cross-task, and real-time decoding algorithms for fNIRS-BCI systems, which has potential applications in constructing a convenient and universal BCI system.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"673-683"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366474/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113066","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

[A review of functional electrical stimulation based on brain-computer interface]. [基于脑机接口的功能性电刺激综述]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202311036

Yao Wang, Yuhan Li, Hongyan Cui, Meng Li, Xiaogang Chen

引用次数: 0

[Construction and analysis of brain metabolic network in temporal lobe epilepsy patients based on ¹⁸F-FDG PET]. [基于 18F-FDG PET 的颞叶癫痫患者脑代谢网络构建与分析]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202312025

Xuan Ji, Ruowei Qu, Zhaonan Wang, Shifeng Wang, Guizhi Xu

{"title":"[Construction and analysis of brain metabolic network in temporal lobe epilepsy patients based on 18F-FDG PET].","authors":"Xuan Ji, Ruowei Qu, Zhaonan Wang, Shifeng Wang, Guizhi Xu","doi":"10.7507/1001-5515.202312025","DOIUrl":"10.7507/1001-5515.202312025","url":null,"abstract":"The establishment of brain metabolic network is based on 18fluoro-deoxyglucose positron emission computed tomography ( 18F-FDG PET) analysis, which reflect the brain functional network connectivity in normal physiological state or disease state. It is now applied to basic and clinical brain functional network research. In this paper, we constructed a metabolic network for the cerebral cortex firstly according to 18F-FDG PET image data from patients with temporal lobe epilepsy (TLE).Then, a statistical analysis to the network properties of patients with left or right TLE and controls was performed. It is shown that the connectivity of the brain metabolic network is weakened in patients with TLE, the topology of the network is changed and the transmission efficiency of the network is reduced, which means the brain metabolic network connectivity is extensively impaired in patients with TLE. It is confirmed that the brain metabolic network analysis based on 18F-FDG PET can provide a new perspective for the diagnose and therapy of epilepsy by utilizing PET images.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"708-714"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366458/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113072","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

[Current progress on characteristics of intracranial electrophysiology related to prolonged disorders of consciousness]. [与长时间意识障碍有关的颅内电生理学特征的最新进展]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202403023

Yongzhi Huang, Jiarou Wu, Minpeng Xu, Jianghong He, Dong Ming

{"title":"[Current progress on characteristics of intracranial electrophysiology related to prolonged disorders of consciousness].","authors":"Yongzhi Huang, Jiarou Wu, Minpeng Xu, Jianghong He, Dong Ming","doi":"10.7507/1001-5515.202403023","DOIUrl":"10.7507/1001-5515.202403023","url":null,"abstract":"Prolonged disorders of consciousness (pDOC) are pathological conditions of alterations in consciousness caused by various severe brain injuries, profoundly affecting patients' life ability and leading to a huge burden for both the family and society. Exploring the mechanisms underlying pDOC and accurately assessing the level of consciousness in the patients with pDOC provide the basis of developing therapeutic strategies. Research of non-invasive functional neuroimaging technologies, such as functional magnetic resonance (fMRI) and scalp electroencephalography (EEG), have demonstrated that the generation, maintenance and disorders of consciousness involve functions of multiple cortical and subcortical brain regions, and their networks. Invasive intracranial neuroelectrophysiological technique can directly record the electrical activity of subcortical or cortical neurons with high signal-to-noise ratio and spatial resolution, which has unique advantages and important significance for further revealing the brain function and disease mechanism of pDOC. Here we reviewed the current progress of pDOC research based on two intracranial electrophysiological signals, spikes reflecting single-unit activity and field potential reflecting multi-unit activities, and then discussed the current challenges and gave an outlook on future development, hoping to promote the study of pathophysiological mechanisms related to pDOC and provide guides for the future clinical diagnosis and therapy of pDOC.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"826-832"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366456/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113073","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

[Fatigue feature extraction and classification algorithm of forehead single-channel electroencephalography signals]. [前额单通道脑电信号的疲劳特征提取和分类算法]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202312026

Huizhou Yang, Yunfei Liu, Lijuan Xia

{"title":"[Fatigue feature extraction and classification algorithm of forehead single-channel electroencephalography signals].","authors":"Huizhou Yang, Yunfei Liu, Lijuan Xia","doi":"10.7507/1001-5515.202312026","DOIUrl":"10.7507/1001-5515.202312026","url":null,"abstract":"Aiming at the problem that the feature extraction ability of forehead single-channel electroencephalography (EEG) signals is insufficient, which leads to decreased fatigue detection accuracy, a fatigue feature extraction and classification algorithm based on supervised contrastive learning is proposed. Firstly, the raw signals are filtered by empirical modal decomposition to improve the signal-to-noise ratio. Secondly, considering the limitation of the one-dimensional signal in information expression, overlapping sampling is used to transform the signal into a two-dimensional structure, and simultaneously express the short-term and long-term changes of the signal. The feature extraction network is constructed by depthwise separable convolution to accelerate model operation. Finally, the model is globally optimized by combining the supervised contrastive loss and the mean square error loss. Experiments show that the average accuracy of the algorithm for classifying three fatigue states can reach 75.80%, which is greatly improved compared with other advanced algorithms, and the accuracy and feasibility of fatigue detection by single-channel EEG signals are significantly improved. The results provide strong support for the application of single-channel EEG signals, and also provide a new idea for fatigue detection research.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"732-741"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366466/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113078","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

[Study on automatic and rapid diagnosis of distal radius fracture by X-ray]. [利用 X 射线自动快速诊断桡骨远端骨折的研究]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202309050

Yunpeng Liu, Kaifeng Gan, Jin Li, Dechao Sun, Hong Qiu, Dongquan Liu

{"title":"[Study on automatic and rapid diagnosis of distal radius fracture by X-ray].","authors":"Yunpeng Liu, Kaifeng Gan, Jin Li, Dechao Sun, Hong Qiu, Dongquan Liu","doi":"10.7507/1001-5515.202309050","DOIUrl":"10.7507/1001-5515.202309050","url":null,"abstract":"This article aims to combine deep learning with image analysis technology and propose an effective classification method for distal radius fracture types. Firstly, an extended U-Net three-layer cascaded segmentation network was used to accurately segment the most important joint surface and non joint surface areas for identifying fractures. Then, the images of the joint surface area and non joint surface area separately were classified and trained to distinguish fractures. Finally, based on the classification results of the two images, the normal or ABC fracture classification results could be comprehensively determined. The accuracy rates of normal, A-type, B-type, and C-type fracture on the test set were 0.99, 0.92, 0.91, and 0.82, respectively. For orthopedic medical experts, the average recognition accuracy rates were 0.98, 0.90, 0.87, and 0.81, respectively. The proposed automatic recognition method is generally better than experts, and can be used for preliminary auxiliary diagnosis of distal radius fractures in scenarios without expert participation.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"798-806"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366454/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113087","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

[Design of nonlinear locking mechanism for shape memory alloy archwire of miniature orthodontic device]. [微型正畸装置形状记忆合金弓丝的非线性锁定机构设计]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202306051

Qingyuan Dai, Li Ji, Jiahao Hua, Zhenyu Liang, Jianwen Yu, Taicong Chen

{"title":"[Design of nonlinear locking mechanism for shape memory alloy archwire of miniature orthodontic device].","authors":"Qingyuan Dai, Li Ji, Jiahao Hua, Zhenyu Liang, Jianwen Yu, Taicong Chen","doi":"10.7507/1001-5515.202306051","DOIUrl":"10.7507/1001-5515.202306051","url":null,"abstract":"The locking mechanism between bracket and shape memory alloy (SMA) archwire in the newly developed domestic orthodontic device is the key to controlling the precise alignment of the teeth. To meet the demand of locking force in clinical treatment, the tightening torque angle of the locking bolt and the required torque magnitude need to be precisely designed. For this purpose, a design study of the locking mechanism is carried out to analyze the correspondence between the tightening torque angle and the locking force and to determine the effective torque value, which involves complex coupling of contact, material and geometric nonlinear characteristics. Firstly, a simulation analysis based on parametric orthogonal experimental design is carried out to determine the SMA hyperelastic material parameters for the experimental data of SMA archwire with three-point bending. Secondly, a two-stage fine finite-element simulation model for bolt tightening and archwire pulling is established, and the nonlinear analysis is converged through the optimization of key contact parameters. Finally, multiple sets of calibration experiments are carried out for three tightening torsion angles. The comparison results between the design analysis and the calibration experiments show that the deviation between the design analysis and the calibration mean value of the locking force in each case is within 10%, and the design analysis method is valid and reliable. The final tightening torque angle for clinical application is determined to be 10° and the rated torque is 2.8 N∙mm. The key data obtained can be used in the design of clinical protocols and subsequent mechanical optimization of novel orthodontic devices, and the research methodology can provide a valuable reference for force analysis of medical devices containing SMA materials.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"766-774"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366461/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113075","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

[Early classification and recognition algorithm for sudden cardiac arrest based on limited electrocardiogram data trained with a two-stages convolutional neural network]. [用两级卷积神经网络训练基于有限心电图数据的心脏骤停早期分类和识别算法]。

生物医学工程学杂志 Pub Date : 2024-08-25 DOI: 10.7507/1001-5515.202306066

Xingzeng Cha, Yue Zhang, Yifei Zhang, Ye Su, Dakun Lai

{"title":"[Early classification and recognition algorithm for sudden cardiac arrest based on limited electrocardiogram data trained with a two-stages convolutional neural network].","authors":"Xingzeng Cha, Yue Zhang, Yifei Zhang, Ye Su, Dakun Lai","doi":"10.7507/1001-5515.202306066","DOIUrl":"10.7507/1001-5515.202306066","url":null,"abstract":"Sudden cardiac arrest (SCA) is a lethal cardiac arrhythmia that poses a serious threat to human life and health. However, clinical records of sudden cardiac death (SCD) electrocardiogram (ECG) data are extremely limited. This paper proposes an early prediction and classification algorithm for SCA based on deep transfer learning. With limited ECG data, it extracts heart rate variability features before the onset of SCA and utilizes a lightweight convolutional neural network model for pre-training and fine-tuning in two stages of deep transfer learning. This achieves early classification, recognition and prediction of high-risk ECG signals for SCA by neural network models. Based on 16 788 30-second heart rate feature segments from 20 SCA patients and 18 sinus rhythm patients in the international publicly available ECG database, the algorithm performance evaluation through ten-fold cross-validation shows that the average accuracy (Acc), sensitivity (Sen), and specificity (Spe) for predicting the onset of SCA in the 30 minutes prior to the event are 91.79%, 87.00%, and 96.63%, respectively. The average estimation accuracy for different patients reaches 96.58%. Compared to traditional machine learning algorithms reported in existing literatures, the method proposed in this paper helps address the requirement of large training datasets for deep learning models and enables early and accurate detection and identification of high-risk ECG signs before the onset of SCA.","PeriodicalId":39324,"journal":{"name":"生物医学工程学杂志","volume":"41 4","pages":"692-699"},"PeriodicalIF":0.0,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366462/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142113077","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