Medical Engineering & Physics最新文献_第2页

A simple algorithm for primary emotion recognition from dual channel EEG signals

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-03-02 DOI: 10.1016/j.medengphy.2025.104316

Avishek Paul , Saurabh Pal , Madhuchhanda Mitra

{"title":"A simple algorithm for primary emotion recognition from dual channel EEG signals","authors":"Avishek Paul , Saurabh Pal , Madhuchhanda Mitra","doi":"10.1016/j.medengphy.2025.104316","DOIUrl":"10.1016/j.medengphy.2025.104316","url":null,"abstract":"<div><div>With the development of neuroscience and computer science, there is a push to employ automated methods to assist individuals in identifying their emotions. Emotion detection is normally carried out by using electroencephalogram (EEG) signals. However, the medical equipment is costly, uncomfortable, and inconvenient because of the numerous electrodes and hair-covered scalp. This challenge demands for a solution to this problem where the requirement of so many electrodes will be replaced by one or two electrodes followed by a simpler signal processing steps. As a solution to this, the current study proposes an algorithm which uses only a pair of EEG electrodes for identifying primary emotions and classifies them based on threshold based rule along with standard classification techniques. The algorithm utilizes two simple features based on signal energy variations in the sub band levels and a feature fusion technique is adopted to further reduce the computational burden. This will lead to reduction in processing power to a greater extent and practical viability will be enhanced. The experimental results prove that the feature fusion strategy does raise recognition accuracy from 97.7 % to 98.4 %. It is shown that the suggested method for emotional recognition is workable and efficient which can be implemented on portable hardware platforms with minimum memory and computational power requirement.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104316"},"PeriodicalIF":1.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-scale feature fusion model for real-time Blood glucose monitoring and hyperglycemia prediction based on wearable devices

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-03-01 DOI: 10.1016/j.medengphy.2025.104312

Yang Song , Ziyu Yuan , Yuxin Wu

{"title":"Multi-scale feature fusion model for real-time Blood glucose monitoring and hyperglycemia prediction based on wearable devices","authors":"Yang Song , Ziyu Yuan , Yuxin Wu","doi":"10.1016/j.medengphy.2025.104312","DOIUrl":"10.1016/j.medengphy.2025.104312","url":null,"abstract":"<div><div>Accurate monitoring of blood glucose levels and the prediction of hyperglycemia are critical for the management of diabetes and the enhancement of medical efficiency. The primary challenge lies in uncovering the correlations among physiological information, nutritional intake, and other features, and addressing the issue of scale disparity among these features, in addition to considering the impact of individual variances on the model's accuracy. This paper introduces a universal, wearable device-assisted, multi-scale feature fusion model for real-time blood glucose monitoring and hyperglycemia prediction. It aims to more effectively capture the local correlations between diverse features and their inherent temporal relationships, overcoming the challenges of physiological data redundancy at large time scales and the incompleteness of nutritional intake data at smaller time scales. Furthermore, we have devised a personalized tuner strategy to enhance the model's accuracy and stability by continuously collecting personal data from users of the wearable devices to fine-tune the generic model, thereby accommodating individual differences and providing patients with more precise health management services. The model's performance, assessed using public datasets, indicates that the real-time monitoring error in terms of Mean Squared Error (MSE) is 0.22mmol/L, with a prediction accuracy for hyperglycemia occurrences of 96.75%. The implementation of the personalized tuner strategy yielded an average improvement rate of 1.96% on individual user datasets. This study on blood glucose monitoring and hyperglycemia prediction, facilitated by wearable devices, assists users in better managing their blood sugar levels and holds significant clinical application prospects.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104312"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validation of marker-based tracking with a biplanar fluoroscopy system optimized for the foot and ankle

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-03-01 DOI: 10.1016/j.medengphy.2025.104310

Eric D. Thorhauer , Corey Wukelic , Will Lin , Nick Entress , Aerie Grantham , William R. Ledoux

{"title":"Validation of marker-based tracking with a biplanar fluoroscopy system optimized for the foot and ankle","authors":"Eric D. Thorhauer , Corey Wukelic , Will Lin , Nick Entress , Aerie Grantham , William R. Ledoux","doi":"10.1016/j.medengphy.2025.104310","DOIUrl":"10.1016/j.medengphy.2025.104310","url":null,"abstract":"<div><div>Biplanar fluoroscopy is a powerful, maturing technique for providing clinicians and biomechanists with <em>in vivo</em> kinematic data of the human skeleton during a variety of tasks. Marker-based tracking with biplane systems has applications in both the <em>in vivo</em> and <em>in vitro</em> realms and serves as the established means of validating model-based tracking algorithms. We have developed a custom biplane system for dynamic imaging of the entire foot and ankle complex during gait as well as a custom software suite to perform the required data preprocessing and marker-based tracking. We demonstrate our ability to repeatably model the biplane imaging chains and then accurately and precisely reconstruct the positions of markers in the foot during static and dynamic motion trials. Finally, we simulate the effects of marker localization errors in reconstructing the poses of the calcaneus, navicular, and proximal phalanx during gait in order to contextualize the extent to which marker-based tracking may be considered ground truth compared to future model-based tracking algorithms.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104310"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a peak insertion torque prediction model for parallel-walled dental implants

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-28 DOI: 10.1016/j.medengphy.2025.104318

Ammar A. Alsheghri , Ali N. Abdalla , Basel Mokahhal , Arthur R.G. Cortes , Jesús Torres Garcia-Denche , Alicia Celemin , Rocio Cascos , Jun Song , Faleh Tamimi

{"title":"Development of a peak insertion torque prediction model for parallel-walled dental implants","authors":"Ammar A. Alsheghri , Ali N. Abdalla , Basel Mokahhal , Arthur R.G. Cortes , Jesús Torres Garcia-Denche , Alicia Celemin , Rocio Cascos , Jun Song , Faleh Tamimi","doi":"10.1016/j.medengphy.2025.104318","DOIUrl":"10.1016/j.medengphy.2025.104318","url":null,"abstract":"<div><div>Implant peak insertion torque is a commonly used indication of primary stability that dentists rely on to make clinical decisions. The aim of this manuscript is to model the peak torque required for dental implant insertion based on clinical data such as bone properties, implant properties, and drilling procedure. A total of 116 parallel-walled Sweden and Martina dental implants were included in this study. Parameters such as age, sex, bone quality (derived from radiographs), applied peak insertion torque, implant location, implant length, final drill diameter, and implant diameter were recorded. Six data-driven regression models were trained and tested using different combinations of the clinical data to predict the peak torque. A physics-based model was also derived for the peak torque and compared with the data-driven models. The neural network model with early stopping achieved the best accuracy in predicting the clinically measured torque (R<sup>2</sup> = 0.7692, MSE = 0.08815). Within the limitations of this study, the results suggest that it is possible to predict the peak torque required for implant placement based on the patient's radiographs, implant's properties, and drill diameter. The findings of this study can serve as a reference for dentists in choosing drilling parameters for dental implant surgeries.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104318"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a bottle-type sensor measuring two-hand movement

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-28 DOI: 10.1016/j.medengphy.2025.104315

Soshiro Kashima , Keisuke Irie , Daiki Watanabe , Shunsuke Kanazawa , Sei Uemura , Momoko Nagai-Tanima , Tomoki Aoyama

{"title":"Development of a bottle-type sensor measuring two-hand movement","authors":"Soshiro Kashima , Keisuke Irie , Daiki Watanabe , Shunsuke Kanazawa , Sei Uemura , Momoko Nagai-Tanima , Tomoki Aoyama","doi":"10.1016/j.medengphy.2025.104315","DOIUrl":"10.1016/j.medengphy.2025.104315","url":null,"abstract":"<div><div>Daily life activities entail the coordinated movement of both hands. Although devices for evaluating the function of one hand are available, in addition, there are currently some limitations in devices for quantitatively evaluating the two-hand movement. This study aimed to develop and examine the validity of a device, called the bottle-type sensor, which can simultaneously measure two-hand movements.</div><div>A bottle-type sensor was created by wrapping a newly developed high-precision flexible sensor sheet around a three-dimensional-printed cap and body part. The force component of each sensor was calculated from the load data, and the loads for each finger were summed. Thirty healthy adults participated in the study, 21 for validity and 9 for reliability. In the validity studies, the values for the body and cap part of the bottle-type sensor were correlated with the grip and pinch forces. For reliability studies, the intraclass correlation coefficient 2, 3 were calculated comparing the results after a day.</div><div>Significant positive correlations with the body and cap parts of the bottle-type sensor were found for the grip and pinch forces. Reliability studies revealed that the body part of the bottle-type sensor had an ICC of >0.75. However, the cap part had an ICC of <0.75, which was insufficient.</div><div>The bottle-type sensor developed in this study showed significant correlations with the grip and pinch forces, but the cap part did not yield satisfactory results in terms of reliability. In the future, the usefulness of the bottle-type sensor needs to be clarified by improving the cap part, as well as by evaluating it during two-hand movements and measuring it in patients with various diseases.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104315"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Breast cancer histopathology image classification using transformer with discrete wavelet transform

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-26 DOI: 10.1016/j.medengphy.2025.104317

Yuting Yan , Ruidong Lu , Jian Sun , Jianxin Zhang , Qiang Zhang

{"title":"Breast cancer histopathology image classification using transformer with discrete wavelet transform","authors":"Yuting Yan , Ruidong Lu , Jian Sun , Jianxin Zhang , Qiang Zhang","doi":"10.1016/j.medengphy.2025.104317","DOIUrl":"10.1016/j.medengphy.2025.104317","url":null,"abstract":"<div><div>Early diagnosis of breast cancer using pathological images is essential to effective treatment. With the development of deep learning techniques, breast cancer histopathology image classification methods based on neural networks develop rapidly. However, these methods usually capture features in the spatial domain, rarely consider frequency feature distributions, which limits classification performance to some extent. This paper proposes a novel breast cancer histopathology image classification network, called DWNAT-Net, which introduces Discrete Wavelet Transform (DWT) to Neighborhood Attention Transformer (NAT). DWT decomposes inputs into different frequency bands through iterative filtering and downsampling, and it can extract frequency information while retaining spatial information. NAT utilizes Neighborhood Attention (NA) to confine the attention computation to a local neighborhood around each token to enable efficient modeling of local dependencies. The proposed method was evaluated on the BreakHis and Bach datasets, yielding impressive image-level recognition accuracy rates. We achieve a recognition accuracy rate of 99.66% on the BreakHis dataset and 91.25% on the BACH dataset, demonstrating competitive performance compared to state-of-the-art methods.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104317"},"PeriodicalIF":1.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of cutting soft tissues using snare-type tools

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-26 DOI: 10.1016/j.medengphy.2025.104314

Jinghang Wang, Urara Satake, Toshiyuki Enomoto

{"title":"Mechanisms of cutting soft tissues using snare-type tools","authors":"Jinghang Wang, Urara Satake, Toshiyuki Enomoto","doi":"10.1016/j.medengphy.2025.104314","DOIUrl":"10.1016/j.medengphy.2025.104314","url":null,"abstract":"<div><div>Cold snare polypectomy (CSP) is the predominant method for removing colonic polyps under 6 mm, utilizing snare-type tools as cutting tools. However, complete resection rates often decrease due to occasional cutting failure. Understanding the cutting mechanisms of snare-type tools is thus crucial for optimizing both the tool and procedure. Research on CSP has primarily focused on surgical case studies, with limited focus on the snare tools. This study investigates the cutting mechanisms of snare-type tools, examining the effects of cutting speed and snare properties on cutting force. The results show that the internal tissue fractures first during CSP, followed by the external tissue. High cutting speeds and thin wire ropes reduce the cutting force required and produce flatter cut cross-sections. Cold snare defect protrusions are primarily due to the high toughness and strength of the submucosa layer tissue, which impedes internal tissue fracture. These findings enhance the understanding of the internal fracture mechanism of soft tissue and provide valuable insights for optimizing snare-type tools, potentially improving the efficacy and safety of polyp resection procedures.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104314"},"PeriodicalIF":1.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of uncertainties in musculoskeletal modeling inputs on sensitivity of knee joint finite element simulations

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-25 DOI: 10.1016/j.medengphy.2025.104313

Sana Jahangir , Will Bosch , Amir Esrafilian , Mika E. Mononen , Petri Tanska , Lauri Stenroth , Marius Henriksen , Tine Alkjær , Rami K. Korhonen

{"title":"Effect of uncertainties in musculoskeletal modeling inputs on sensitivity of knee joint finite element simulations","authors":"Sana Jahangir , Will Bosch , Amir Esrafilian , Mika E. Mononen , Petri Tanska , Lauri Stenroth , Marius Henriksen , Tine Alkjær , Rami K. Korhonen","doi":"10.1016/j.medengphy.2025.104313","DOIUrl":"10.1016/j.medengphy.2025.104313","url":null,"abstract":"<div><div>Musculoskeletal finite element modeling is used to estimate mechanical responses of knee joint tissues but involves uncertainties in muscle activations, marker locations, cartilage stiffness, maximum isometric forces, and gait parameter personalization. This study investigates how these uncertainties affect cartilage mechanical responses in knee joint finite element models during walking. We selected three subjects and constructed five musculoskeletal models for each, representing different variations of modeling assumptions, along with a reference model using conventional assumptions. We then ran finite element simulations of knee joints using both personalized gait inputs (motion and loading boundary conditions) and non-personalized gait inputs from literature. Our results demonstrated that varying modeling assumptions, such as optimization function for muscle activation patterns, knee marker position, knee cartilage stiffness, and maximum isometric force, produced highly subject-specific effects. Differences between the reference and altered models ranged from 3% to 30% in musculoskeletal modeling and from 1% to 61% in finite element modeling results. The largest effects occurred with non-personalized gait data, resulting in up to 6- and 2-fold changes in musculoskeletal and finite element modeling results, respectively. This study highlights the sensitivity of knee mechanics to different modeling assumptions and underscores the importance of applying personalized gait parameters for accurate finite element simulations.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104313"},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","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 test evaluation of a customised humeral component for an instrumented total elbow prosthesis and strain validation study

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-24 DOI: 10.1016/j.medengphy.2025.104311

Marim Basiouny , Simon Lambert , Chin Kuenfoo , Stephen Taylor

{"title":"Fatigue test evaluation of a customised humeral component for an instrumented total elbow prosthesis and strain validation study","authors":"Marim Basiouny , Simon Lambert , Chin Kuenfoo , Stephen Taylor","doi":"10.1016/j.medengphy.2025.104311","DOIUrl":"10.1016/j.medengphy.2025.104311","url":null,"abstract":"<div><div>The survival rate of total elbow arthroplasty (TEA) is negatively impacted by the lack of available data on elbow biomechanics. This study developed a modified humeral component for TEA that is purposed to be instrumented to generate real-time 6 degrees of freedom (d.o.f) force and moment data during activities of daily living (ADL). The objectives are twofold: (1) to assess the safety of the modified humeral component under peak anticipated loads in fatigue, and (2) verify the strains measured under physiological loads with strains modelled using finite element analysis (FEA). Four modified titanium alloy humeral components were welded, and fatigue tested at 5 Hz for 5 million cycles under a compressive load of 700 N corresponding to moderate ADL. The strains were measured using triaxial 350 Ω rectangular rosette (45°) strain gauges bonded to three specific locations on the humeral component confirmed through an FE study. The four welded humeral components successfully withstood fatigue conditions and did not deform. The measured and modelled principal strains were confirmed to be highest at the external wall of the lateral cavity, with a percentage difference of <10 %.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104311"},"PeriodicalIF":1.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties of decellularized porcine esophagus: Preliminary results

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-20 DOI: 10.1016/j.medengphy.2025.104294

Romane LESIEUR , Agnès DROCHON , Marlène DURAND

引用次数: 0