Acoustic Field Comparison of High Intensity Focused Ultrasound Using Experimental Characterization and Finite Element Simulation
J. L. Teja, A. Vera, L. Leija
Department of Electrical Engineering, Cinvestav-IPN, Mexico D.F., Mexico
High Intensity Focused Ultrasound (HIFU) is used as a noninvasive technique of tissue heating and ablation for different medical treatments. This paper presents a quantitative comparison of HIFU acoustic fields experimentally obtained versus simulated acoustic fields. Acoustic field characterization was realized in two HIFU transducers using water as a propagation medium. Also, simulations were ...
P. Priya , B. D. Pant ,
 Birla Institute of Technology and Science Pilani, Pilani, Rajasthan, India
 CSIR-Central Electronics Engineering Research Institute, Pilani, Rajasthan, India
In this paper, a free membrane is used as a receiver to increase the capacitance and therefore the resolution of the flow meter. For the current application, from the wavelength of sound wave in soft tissue (c= 1540 m/s) the resolution was calculated to be 0.48 mm. This gives the first Eigen frequency of the capacitive structure according to which the poly silicon membrane was designed. After ...
E. Isaza, E. Salazar, L. Florez
Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia
The consequences of hip fracture and femoral fracture are widely known. The mechanical strength of the femur varies in every person, but it is possible to predict the mechanical resistance with parameters like density, dimensions and mineral content. This paper uses different models and empirical studies to determine the mechanical properties of the human femur, developing isotropic and ...
A. Fouchard , S. Bonnet , L. Hervé , O. David ,
 University Grenoble Alpes, CEA, LETI, MINATEC Campus, Grenoble, France
 Univesité Joseph Fourier, Grenoble Institute of Neuroscience, La Tronche, France
An implementation of the Electrical Impedance Tomography (EIT) forward problem in a generalist FEM package is presented. It fulfils the complete electrode model boundary conditions, combining current injection with contact impedance on a single boundary. Our implementation is benchmarked with the EIDORS FEM library. The Comsol Multiphysics environment proves consistent and provides a flexible ...
Numerical Study on Mechanical Properties of Stents with Different Materials during Stent Deployment with Balloon Expansion.
P. Ghosh, K. DasGupta, D. Nag, and A. Chanda
School of Bio Science & Engineering, Jadavpur University, Kolkata, West Bengal, India
Mechanical Engineering Department, Jadavpur University, Kolkata, West Bengal, India
The main reason for stent implantation is to provide mechanical support to the arterial wall. So it is important to consider the different mechanical properties of different stent materials while studying the stent implant’s efficacy. The present study gives a comparative overview of mechanical aspects of different stent materials which are most commonly used in angioplasty. Deformation ...
B. Hari, S. Bakalis, P. Fryer
The University of Birmingham, School of Chemical Engineering, Edgbaston, Birmingham, United Kingdom
Worldwide attention in the computational modeling and simulation of the human intestine is increasing in order to help understand its complex behavior and improve health. Computational fluid dynamics is an essential tool to understand the mechanics and transport phenomena of the human intestine, thereby advancing the diagnosis and treatment of gastrointestinal related diseases. The aim of this ...
Assessment of Diffuse Optical Tomography Image Reconstruction Methods Using a Photon Transport Model
M. M. Althobaiti , H. S. Salehi , Q. Zhu ,
 Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
 Department of Electrical and Computer Engineering, University of Connecticut, Storrs, CT, USA
Imaging of tissue with near-infrared diffuse optical tomography is emerging as a practical method to map hemoglobin concentrations within tissue for breast cancer detection and diagnosis. The accurate recovery of images by using numerical modeling requires an effective image reconstruction method. We illustrate a comparison between two widely used reconstruction methods using finite element ...
Improving Detection Sensitivity for Nanoscale Targets Through Combined Photonic and Plasmonic Techniques
G. Zhang, Y. Zhao
Clemson University, Clemson, SC, USA
Photonic technique such as the whispering gallery mode (WGM) is often used for detection of small particles like bacteria and viruses. It offers good detection sensitivity and is advantageous over other detection techniques because the detection can be label free. However, the detection sensitivity may not be sufficient when the size of the detection target is in nanoscale. To change this, we ...
Comparing Isotropic and Anisotropic Brain Conductivity Modeling: Planning Optimal Depth-Electrode Placement in White Matter for Direct Stimulation Therapy in an Epileptic Circuit
L. C. Zaragoza, B. Hondorp, M. A. Rossi
ITESM, Monterrey, Mexico
Rush Medical College, Chicago, IL, USA
Rush University Medical Center, Chicago, IL, USA
The goal of our work was to calculate a patient-specific brain conductivity map for predicting the extent to which direct stimulation therapy can strategically propagate through pathological white matter. Our laboratory developed isotropic and anisotropic human brain finite element method (FEM) models derived from SPGR magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI), ...
M. Miliani, F. Piccagli
Medtronic Invatec S.p.A., Roncadelle, BS, Italy
During peripheral intravascular interventions one of the main issues is the correct deployment of the guidewire (GW) to the anatomical site which has to be treated, often supported by a microcatheter. There is a trade-off between the microcatheter flexibility and its push-ability to be able to reach the anatomical site. The catheter design has been defined with 2 transition zones. A parametric ...