Volume 3: Biomedical and Biotechnology Engineering最新文献_第2页

An Improved Holographic Microwave Breast Imaging Based on Deep Neural Network 基于深度神经网络的改进全息微波乳房成像

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-10910

Lulu Wang

引用次数: 0

Shoulder Proprioception Device (S.P.D.): A Novel Design for Measuring Shoulder Joint Proprioception 肩本体感觉装置:一种测量肩关节本体感觉的新设计

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-11948

Jeremy R. Schnipke, Thomas G. Rounds, Jacob P. Sroka, Zachary B. Lowe, Gregory M Freisinger, Margaret Nowicki, K. Cameron, B. Hotaling, Richard B. Westrick

{"title":"Shoulder Proprioception Device (S.P.D.): A Novel Design for Measuring Shoulder Joint Proprioception","authors":"Jeremy R. Schnipke, Thomas G. Rounds, Jacob P. Sroka, Zachary B. Lowe, Gregory M Freisinger, Margaret Nowicki, K. Cameron, B. Hotaling, Richard B. Westrick","doi":"10.1115/imece2019-11948","DOIUrl":"https://doi.org/10.1115/imece2019-11948","url":null,"abstract":"\u0000 Shoulder injuries are a serious and costly issue, particularly in physically intensive professions like athletics and the military. Previous data indicates a dangerous feedback mechanism between reduced shoulder proprioception due to previous injury and higher probability of re-injury due to reduced proprioception. It is therefore important for organizations to possess a device that can accurately and efficiently evaluate and track an individual’s shoulder proprioception, especially following injury. Existing technologies that fill this role are generally impractical or do not quantify proprioception to the necessary levels of accuracy. The Shoulder Proprioception Device (SPD) therefore strives to measure and quantify three-dimensional shoulder proprioception in a highly accurate, user-friendly, and cost-effective manner. This device employs two Inertial Measurement Units (IMUs) with nine degrees-of-freedom attached to the lateral and frontal sides of the upper arm. These sensors are connected to a microcontroller board with a touch screen and datalogger. The screen displays the shoulder angles in real-time and allows the user to store discrete angle positions for further analysis through the data-logger. The system is compact (390 cubic centimeter volume), light (0.34 kilograms), and cost effective ($179 per unit). This device is capable of measuring, in a total procedural time of seven minutes, shoulder proprioception within two degrees of accuracy along the three anatomical planes of motion: sagittal flexion/extension, frontal abduction/adduction, and transverse abduction/adduction. This device is able to both aid upper extremity research and provide data to those making return to duty decisions following injury.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125453091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical Behavior of Lattice Structures Fabricated by Direct Light Processing With Compression Testing and Size Optimization of Unit Cells 直接光加工晶格结构的力学性能、压缩测试和单元格尺寸优化

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-12260

Marinela Peto, E. Ramírez-Cedillo, M. J. Uddin, C. Rodríguez, H. Siller

{"title":"Mechanical Behavior of Lattice Structures Fabricated by Direct Light Processing With Compression Testing and Size Optimization of Unit Cells","authors":"Marinela Peto, E. Ramírez-Cedillo, M. J. Uddin, C. Rodríguez, H. Siller","doi":"10.1115/imece2019-12260","DOIUrl":"https://doi.org/10.1115/imece2019-12260","url":null,"abstract":"\u0000 Lattice structures used for medical implants offer advantages related to weight reduction, osseointegration, and minimization of stress shielding. This paper intends to study and to compare the mechanical behavior of three different lattice structures: tetrahedral vertex centroid (TVC), hexagonal prism vertex centroid (HPVC), and cubic diamond (CD), that are designed to be incorporated in a shoulder hemiprosthesis. The unit cell configurations were generated using nTopology Element Pro software with a uniform strut thickness of 0.5 mm. Fifteen cuboid samples of 25mm × 25mm × 15 mm, five for each unit cell configuration, were additively manufactured using Direct Light Printing (DLP) technology with a layer height of 50μm and a XY resolution of 73μm. The mechanical behavior of the 3D printed lattice structures was examined by performing mechanical compression testing. E-silicone (methacrylated silicone) was used for the fabrication of samples, and its mechanical properties were obtained from experimental tensile testing of dog-bone samples. A methodology for size optimization of lattice unit cells is provided, and the optimization is achieved using nTopology Element Pro software. The generated results are analyzed, and the HPVC configuration is selected to be incorporated in the further design of prosthesis for bone cancer patients.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122496811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effects of Curvature and Architecture on Ballistic Performance of UHMWPE Helmets 曲率和结构对超高分子量聚乙烯头盔弹道性能的影响

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-11566

Timothy Zhang, Lionel Vargas-Gonzalez, James Gurganus, S. Satapathy

引用次数: 3

Miniaturized Ultrasound Transducer Composed of a Composite of Multiple Piezoelectric Stacks 多压电堆复合材料的小型化超声换能器

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-12208

Howuk Kim, Huaiyu Wu, Leela D. Goel, Xiaoning Jiang

{"title":"Miniaturized Ultrasound Transducer Composed of a Composite of Multiple Piezoelectric Stacks","authors":"Howuk Kim, Huaiyu Wu, Leela D. Goel, Xiaoning Jiang","doi":"10.1115/imece2019-12208","DOIUrl":"https://doi.org/10.1115/imece2019-12208","url":null,"abstract":"\u0000 This paper aims to develop a miniaturized ultrasound transducer for intravascular thrombolysis, which requires a transducer with high mechanical index (> 0.3) and a long focal distance (> 2.0 mm). To meet this need, a composite of a multi-pillar piezo stack (MPPS) transducer was designed and fabricated by using PZT-4, conductive epoxy, soft elastomer, and a metallic concave lens. The simulation results showed the predominant extensional mode at around 0.92 MHz. The −6 dB focal distance was elongated by 150% from that of the common single-pillar piezo stack (SPPS) transducer with the same aperture. The acoustic pressure was improved by 8.2 dB at the focal zone. Next, the experimental results showed the peak-to-negative pressure of 1.92 MPa under 120 Vpp input, which was sufficient to cause the inertial cavitation of microbubble contrast agents. The −6 dB focal distance reached up to 3.4 mm which was a significant improvement compared to the conventional SPPS transducer. The developed intravascular transducer will be employed for the microbubble-mediated ultrasound thrombolysis to reduce the treatment time.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132357227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Developing a Cost-Effective and Functional Prosthetic Foot for Below Knee Amputees Using Topology Optimization and 3D Printing 利用拓扑优化和3D打印技术为膝下截肢者开发具有成本效益和功能的假肢足

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-10616

H. Kamel, O. Harraz, Tamer A. Attia

{"title":"Developing a Cost-Effective and Functional Prosthetic Foot for Below Knee Amputees Using Topology Optimization and 3D Printing","authors":"H. Kamel, O. Harraz, Tamer A. Attia","doi":"10.1115/imece2019-10616","DOIUrl":"https://doi.org/10.1115/imece2019-10616","url":null,"abstract":"\u0000 This paper presents the results of an investigative study on the development of an affordable and functional prosthetic foot for below knee amputees. A prototype was successfully manufactured using 3D printing technology. This continuously evolving technology enables the rapid production of prosthetics that are individually customized for each patient. Our prototype was developed after conducting a topology optimization study that interestingly converged to the shape of the biological human foot. Afterwards, a design was envisioned where a simple energy storage and release mechanism was implemented to replace the Achilles tendon, which minimizes the metabolic energy cost of walking. Our mechanism can successfully manage 70% of the energy compared to a normal person during each walking step. A finite element (FE) model of the prosthetic was developed and validated using experimental tests. Then, this FE model was used to confirm the safe operation of the prosthetic through simulating different loading scenarios according to the ISO standard. Our study clearly showed that customizable prosthetics could be produced at a fraction 1/60 of the cost of the commercially sold ones.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127821080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial Variations in Achilles Tendon Shear Wave Speed Using a Cost-Effective Method of Accelerometers 利用高效的加速度计方法研究跟腱横波速度的空间变化

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-11001

Muhammad Salman, Conghui Ge, Clint Morris

{"title":"Spatial Variations in Achilles Tendon Shear Wave Speed Using a Cost-Effective Method of Accelerometers","authors":"Muhammad Salman, Conghui Ge, Clint Morris","doi":"10.1115/imece2019-11001","DOIUrl":"https://doi.org/10.1115/imece2019-11001","url":null,"abstract":"\u0000 Currently there are no cost-effective ways to quantitatively measure the in-vivo mechanical properties of the Achilles tendon. Stiffness can be used as a measure of tone and mechanical integrity of both muscles and tendons. Stiffness of the Achilles tendon (AT) can be quantified by the speed of shear wave propagation. The speed of propagation can then be used to find the instantaneous shear modulus. Currently there are other methods such as Ultrasound (US) imaging and Magnetic Resonance Imaging (MRI) which are used clinically to determine the variations in stiffness of the AT. However, these methods require complex signal processing and experienced technicians. Moreover, US imaging technique is limited in measuring high shear wave speed values which are greater than 17 m/s. In this research, one-dimensional accelerometers were used to measure acceleration through the AT. Then a cross-correlation signal processing technique was used to convert acceleration to the velocity of shear wave propagation across the AT. This method could potentially evaluate the mechanical properties of both normal and damaged tendons. This process has proven to be a cost-effective and simple way to assess the stiffness of the AT. The modulus of elasticity (E) was found using the following relation: E = 3ρV2.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125893499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Uvula Length on Airflow and Pressure Oscillation in a Human Pharynx Model 小舌长度对人咽模型气流和压力振荡的影响

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-11697

Xuanming Zhao, Junshi Wang, Pan Han, J. Xi, Haibo Dong

{"title":"Effect of Uvula Length on Airflow and Pressure Oscillation in a Human Pharynx Model","authors":"Xuanming Zhao, Junshi Wang, Pan Han, J. Xi, Haibo Dong","doi":"10.1115/imece2019-11697","DOIUrl":"https://doi.org/10.1115/imece2019-11697","url":null,"abstract":"\u0000 Unsteady uvula motions and the resultant pressure oscillations within the pharyngeal airway are critical for the pathology of snoring and sleeping apnea. In this paper, an immersed-boundary-method based direct numerical simulation flow solver was adopted to simulate the unsteady flows in an anatomically accurate pharynx model reconstructed from human magnetic resonance images (MRI) with prescribed uvula oscillation and airway obstruction. In order to study the influence of uvula length on the aerodynamics of pharyngeal airflow, simulations were conducted using various uvula models with scaled uvula lengths at 25%, 50%, 75%, and 100% of the original length, respectively. Analyses of vortex dynamics, pressure oscillations, and the aerodynamic force of uvula were conducted. It was found the length of uvula had significant impacts on vortex development as well as aerodynamic pressure/force. Shorter uvula induced weaker pressure oscillations and fewer vortices in the airway. Further fast Fourier transform analysis of pressures from different pressure probes showed higher-order harmonic waves other than the base frequency of uvula motion. This study is expected to bring understanding of snoring and sleep apnea and provide guidance for surgery.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130006753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Microstructural Hyperelastic Characterization of Brain White Matter in Tension 脑白质张力的微结构超弹性特征

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-11549

M. Ramzanpour, Mohammad Hosseini-Farid, M. Ziejewski, G. Karami

{"title":"Microstructural Hyperelastic Characterization of Brain White Matter in Tension","authors":"M. Ramzanpour, Mohammad Hosseini-Farid, M. Ziejewski, G. Karami","doi":"10.1115/imece2019-11549","DOIUrl":"https://doi.org/10.1115/imece2019-11549","url":null,"abstract":"\u0000 Axons as microstructural constituent elements of brain white matter are highly oriented in extracellular matrix (ECM) in one direction. Therefore, it is possible to model the human brain white matter as a unidirectional fibrous composite material. A micromechanical finite element model of the brain white matter is developed to indirectly measure the brain white matter constituents’ properties including axon and ECM under tensile loading. Experimental tension test on corona radiata conducted by Budday et al. 2017 [1] is used in this study and one-term Ogden hyperelastic constitutive model is applied to characterize its behavior. By the application of genetic algorithm (GA) as a black box optimization method, the Ogden hyperelastic parameters of axon and ECM minimizing the error between numerical finite element simulation and experimental results are measured. Inverse analysis is conducted on the resultant optimized parameters shows high correlation of coefficient (>99%) between the numerical and experimental data which verifies the accuracy of the optimization procedure. The volume fraction of axons in porcine brain white matter is taken to be 52.7% and the stiffness ratio of axon to ECM is perceived to be 3.0. As these values are not accurately known for human brain white matter, we study the material properties of axon and ECM for different stiffness ratio and axon volume fraction values. The results of this study helps to better understand the micromechanical structure of the brain and micro-level injuries such as diffuse axonal injury.","PeriodicalId":332737,"journal":{"name":"Volume 3: Biomedical and Biotechnology Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130107046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A Biphasic Viscoelastic Constitutive Model for Brain Tissue 脑组织双相粘弹性本构模型

Volume 3: Biomedical and Biotechnology Engineering Pub Date : 2019-11-11 DOI: 10.1115/imece2019-10743

M. H. Farid, M. Ramzanpour, M. Ziejewski, G. Karami

引用次数: 3