Medical Engineering & Physics最新文献_第5页

Development of a peak insertion torque prediction model for parallel-walled dental implants 平行壁种植体峰值插入力矩预测模型的建立

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 一种测量双手运动的瓶式传感器的研制

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 离散小波变换变压器对乳腺癌组织病理图像的分类

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 使用陷阱型工具切割软组织的机制

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 肌肉骨骼建模输入的不确定性对膝关节有限元模拟灵敏度的影响

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 全肘关节假体定制肱骨构件疲劳试验评估及应变验证研究

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 脱细胞猪食道的力学特性：初步结果

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

An FE model investigating the bone-implant interface of Osseointegrated prosthetics to better understand how forces are transferred under loading 利用有限元模型研究骨整合假体的骨-种植体界面，以更好地理解载荷作用下的力传递

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-10 DOI: 10.1016/j.medengphy.2025.104304

Tiereny McGuire , Arul Ramasamy , Anthony M J Bull

{"title":"An FE model investigating the bone-implant interface of Osseointegrated prosthetics to better understand how forces are transferred under loading","authors":"Tiereny McGuire , Arul Ramasamy , Anthony M J Bull","doi":"10.1016/j.medengphy.2025.104304","DOIUrl":"10.1016/j.medengphy.2025.104304","url":null,"abstract":"<div><h3>Background</h3><div>Osseointegrated prostheses (OIP) use is increasing for above-knee amputees who have difficulties with sockets. This study aims to simulate the bone-implant interface under loading using a 3D finite element (FE) model and quantify force distribution to produce hypotheses on bone remodelling and implant failure, informing implant and surgical design, and rehabilitation protocols.</div></div><div><h3>Methods</h3><div>Ten customised 3D femur FE models (5 female, 5 male) were generated from CT scans and bone-implant assemblies created. The bone was subdivided into seven Gruen Zones and four proximal femur regions. Boundary conditions were taken from the literature.</div></div><div><h3>Results</h3><div>The highest stresses were found in the implant (Max: 113.9 MPa), whilst highest strains were seen in the bone (Max: 4.89 %). Stress and strain were unevenly distributed, with distal regions experiencing stress shielding effects and areas around the implant tip experiencing significantly higher stresses and strains (<em>p</em> < .001). Maximum stresses were higher in female bones (<em>p</em> < .01), whilst shorter residuum lengths saw significantly lower stresses (<em>p</em> < .05).</div></div><div><h3>Conclusion</h3><div>Sex, size and limb length are all important factors and these need to be accounted for when designing and implanting OIPs.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"137 ","pages":"Article 104304"},"PeriodicalIF":1.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444391","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

Atomic-level insights into the adsorption of various biopolymers on Fe3O4 nanoparticles: A molecular dynamics study 不同生物聚合物在Fe3O4纳米颗粒上的吸附：分子动力学研究

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-08 DOI: 10.1016/j.medengphy.2025.104301

Farzad Pashmforoush, Shahram Ajori

{"title":"Atomic-level insights into the adsorption of various biopolymers on Fe3O4 nanoparticles: A molecular dynamics study","authors":"Farzad Pashmforoush, Shahram Ajori","doi":"10.1016/j.medengphy.2025.104301","DOIUrl":"10.1016/j.medengphy.2025.104301","url":null,"abstract":"<div><div>In this study, molecular dynamics simulations were implemented to investigate the atomic-level interactions of three different biopolymers (Gum Tragacanth, pectin, and carrageenan) on Fe<sub>3</sub>O<sub>4</sub> nanoparticles. The main purpose was to achieve a deep understanding of the adsorption dynamics between these biopolymers and magnetic nanoparticle. In this respect, initially, the adsorption models were simulated under NVT conditions, and consequently, in-depth analyses of interaction energies, concentration profiles, and radial distribution functions were conducted. According to the obtained results, a strong adsorption of all three biopolymers on nanoparticles surface was observed, caused mainly by hydrogen bonds and van der Waals forces. However, Fe<sub>3</sub>O<sub>4</sub>/carrageenan demonstrated the strongest binding affinity among the biopolymer-nanoparticle pairs. This research provides critical atomic-level insights into biopolymer-nanoparticle interactions, bridging a significant knowledge gap and enhancing the understanding and potential application of Fe<sub>3</sub>O<sub>4</sub>-based materials in cutting-edge biomedical technologies.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"137 ","pages":"Article 104301"},"PeriodicalIF":1.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444392","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

Assessment of pre- and post-operative gait dynamics in total knee arthroplasty by a wearable capture system 用可穿戴捕获系统评估全膝关节置换术前后的步态动力学

IF 1.7 4区医学

Medical Engineering & Physics Pub Date : 2025-02-08 DOI: 10.1016/j.medengphy.2025.104309

Zhuoxi Bi , Wenquan Cui , Luming Feng , Yaxin Liu , Xin Ma , Shihao Li , Changle Ren , Liming Shu

{"title":"Assessment of pre- and post-operative gait dynamics in total knee arthroplasty by a wearable capture system","authors":"Zhuoxi Bi , Wenquan Cui , Luming Feng , Yaxin Liu , Xin Ma , Shihao Li , Changle Ren , Liming Shu","doi":"10.1016/j.medengphy.2025.104309","DOIUrl":"10.1016/j.medengphy.2025.104309","url":null,"abstract":"<div><h3>Background</h3><div>Walking function reconstruction is suboptimal after total knee arthroplasty. However, a comprehensive investigation of kinematic and kinetic parameters before and after total knee arthroplasty is lacking. This study aimed to quantitatively compare the differences in gait parameters before and after total knee arthroplasty with those of healthy control group.</div></div><div><h3>Methods</h3><div>This study utilized a wearable capture system to obtain gait parameters from pre- operative and one-year post- operative patients, as well as from the healthy control group. The parameters included walking speed, the stance phase percentage during the gait cycle, knee flexion angle, center of pressure trajectory, vertical ground reaction force, and its moment on the coronal plane of the knee joint.</div></div><div><h3>Results</h3><div>Post-total knee arthroplasty patients presented an averaged 12.5 % improvement in walking speed and an averaged 19.75 % increasement in the maximum knee flexion angle during the gait cycle, although both were still lower than those of the healthy control group. During the stance phase, the vertical ground reaction force exhibited a less pronounced double-hump feature, and compared to preoperative levels, the peak of the coronal plane moment of the knee was reduced by approximately half.</div></div><div><h3>Conclusion</h3><div>One-year post- total knee arthroplasty patients exhibited improved walking function compared to preoperative levels, but a gap remained compared to healthy control group. Additionally, preoperative gait abnormalities persisted postoperatively.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"137 ","pages":"Article 104309"},"PeriodicalIF":1.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394474","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