Behailu Kibret

Behailu Kibret
Monash University (Australia) · Department of Electrical and Computer Systems Engineering, Clayton

PhD

About

35
Publications
24,200
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579
Citations

Publications

Publications (35)
Article
The past decade has witnessed growing interest in developing soft wearable pressure sensors with the ultimate goal of transforming today's hospital-centered diagnosis to tomorrow's patient-centered bio-diagnosis. In this context, battery-free wireless antenna-based pressure sensors will be highly advantageous for ubiquitous real-time health monitor...
Chapter
This chapter first examines a new analytical electromagnetic model that uses galvanically coupled intrabody communication (IBC). Frequencies ranging from hundreds of kHz up to a few MHz are considered under quasi-static assumptions. The model is unified in the sense that it can be applied to any part of the body (i.e., head, torso, limbs, etc.). It...
Raw Data
The folder contains the 33 anatomical structures of the Menelik surface mesh head model in STL files. A pdf file containing the information of each STL file was also included. All surface mesh models have water-tight faces (no holes), 2-manifold mesh, and no self-intersecting faces that make them suitable for numerical computations. The quality o...
Raw Data
The Menelik head voxel model in DICOM(MR) format. Filename: Menelik-DICOM(MR).dcm File Privileges: READ WRITE Image Dimensions (X, Y, Z): 396 x 514 x 442 Series Length: 1 Voxel Dimensions (X, Y, Z): 0.5 x 0.5 x 0.5 Millimeters Size of Series Point: 0 Seconds Byte Type: 2-Byte Unsigned Integer Byte Order: Little Endian Compression: None Data Ori...
Raw Data
The Menelik head voxel model in NIFTI format. Dimension: 396x514x442 (xyz) Voxel size: 0.5 0.5 0.5 (mm) Byte type: 1-Byte unsigned integer Compression: GZIP Data Orientaion: Column(X+), Rows(Y-), Slices(Z+) File Format: NIFTI Download file from: https://figshare.com/articles/Menelik_head_voxel_model_in_NIFTI_format_/6649790
Raw Data
The videos show the sagittal, axial, and coronal sections of the Menelik voxel model with the segmented anatomical structures rendered in grayscale. The grayness indices represent anatomical structures with similar electromagnetic properties. View or download videos from: https://figshare.com/articles/Menelik_voxel_model_videos/6646319
Raw Data
The folder contains the Menelik voxel model (Menelik_Raw.raw) , which is an 8 bits unsigned integer binary file. The dimension of the matrix is 396x514x442 (x,y,z), with spacing of 0.5 mm in each direction. The folder also contains voxel header files for CST Studio - CST-voxel.vox contains header information - CST-Material.txt contains the electro...
Raw Data
The Menelik head mesh model in ASIC SAT version 26 file format. The file format is the native format of CST Studio and it has higher precision point representation compared to STL. The Menelik model was tested for FEM meshability using this file format in CST Studio 2017. It is recommended to use this file in CST Studio for mesh based simulation....
Article
Over the past six decades there has been tremendous progress made in the field of medical implant communications. A comprehensive review of the progress, current state-of-the-art and future direction is presented in this chapter. Implanted Medical Devices (IMDs) are designed mainly for the purpose of diagnostic, therapeutic and assitive application...
Article
Full-text available
Electroconvulsive therapy (ECT) is an effective treatment option for severe mental illness during pregnancy. However, there is little knowledge about the amount of electric field produced inside the foetus, which is important to understand the effects of ECT on the foetal excitable tissues. Thus, in this paper, the electric field strength inside th...
Article
Full-text available
It is known that diverse technological applications require the use of focused magnetic fields. This has driven the quest for controlling the magnetic field. Recently, the principles in transformation optics and metamaterials have allowed the realization of practical static magnetic flux concentrators. Extending such progress, here, we propose a ti...
Article
Full-text available
This paper presents a new perspective on the analysis of the cylindrical antenna theory. It applies the cylindrical surface waves on an infinitely-long cylindrical conductor, which are similar to the Sommerfeld axial cylindrical surface waves, to describe the conventional postulate of applying a sinusoidal current distribution on a cylindrical dipo...
Article
Full-text available
Health-care monitoring and diagnostics technology continues to be of great interest in research due to an increasing trend in the number of people with chronic diseases. To improve accuracy and timeliness of diagnosis, electronic devices could be implanted inside human body to provide various real-time diagnostic information. However, effective tec...
Article
Full-text available
Currently, the radio-frequency (RF) implant wireless communication is enabled by utilizing small antennas that radiate radio waves inside the human body. As an alternative technique for implant wireless communication, we propose to use the human body itself as an antenna by feeding an RF current into the tissues. In particular, this paper studies t...
Article
Full-text available
International guidelines and standards on whole-body radio-frequency (RF) dosimetry use the Whole-Body Averaged Specific Absorption Rate (WBA-SAR) as a surrogate metric to quantify the temperature rise in the body. This study proposes the analysis of whole-body RF dosimetry for far-field exposure of a grounded human body in the frequency range of 1...
Article
Full-text available
This paper, for the first time, fully characterizes the human body as a monopole antenna in the frequency range of 10 - 110 MHz, which contains the resonance frequency of the human body. The human body is represented by an equivalent cylindrical monopole antenna grounded on a highly conductive ground plane that is analysed based on the three-term a...
Article
Full-text available
Human body communication (HBC) is a promising wireless technology that uses the human body as part of the communication channel. HBC operates in the near-field of the high frequency (HF) band and in the lower frequencies of the very high frequency (VHF) band, where the electromagnetic field has the tendency to be confined inside the human body. Ele...
Article
Full-text available
Intrabody Communication (IBC) is a technique that uses the human body as a transmission medium for electrical signals to connect wearable electronic sensors and devices. Understanding the human body as the transmission medium in IBC paves way for practical implementation of IBC in body sensor networks. In this study, we propose a model for galvanic...
Article
Full-text available
This study proposes an accurate estimation of whole-body averaged specific absorption rate (WBA-SAR) for far-field exposure of an isolated human body in the frequency range of 10-200 MHz based on a lossy homogenous cylindrical antenna model of the human body. Equations are derived for the total induced axial current and the whole-body averaged SAR...
Conference Paper
Intra-body communication (IBC) is a recent wireless communication technology which uses the human body as the signal propagation medium. While recent studies have shown a degradation of transmission signals for IBC transmissions between limb segments, these degradations have yet to be quantified with respect to relative limb positions. In this pape...
Conference Paper
Intrabody Communication (IBC) is a technique that uses the human body as a transmission medium for electrical signals to connect wearable electronic sensors and devices. Understanding the contributions of tissues for signal transmission in IBC, which requires a good understanding of dielectric properties of biological tissues, paves a way for pract...
Article
Full-text available
The rapid increase in healthcare demand has seen novel developments in health monitoring technologies, such as the body area networks (BAN) paradigm. BAN technology envisions a network of continuously operating sensors which measure critical physical and physiological parameters e.g., mobility, heart rate and glucose levels. Wireless connectivity i...

Questions

Question (1)
Question
Does anyone know how to do different posing on a voxel human body model using free software such as Bender? Or are there other ways of doing it?

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Projects

Projects (2)
Project
This project is part of the Australian Research Council (ARC) funded Discovery Early Career Researcher Award (DECRA) project (project number DE180101211, awarded to Dr Behailu Kibret). In this project, we have developed the first version of a highly detailed human head model named "Menelik", in both voxel and triangular surface mesh formats, based on the Visible Human Project (VHP) male image data set. The model has 33 different anatomical structures that were indexed to 23 voxel regions based on their electromagnetic material properties. The model was validated and tested by simulating a scenario of transcranial Direct Current Stimulation (tDCS) and by computing the specific absorption rate (SAR) from a transmit coil of magnetic resonance imaging (MRI). At the time of this entry (June 2018), the first version of Menelik is the only detailed human body model that is available in both voxel and mesh formats, tested for finite element method (FEM) meshability, and freely distributed. The next version of the Menelik model is being developed with improved anatomical accuracy and manageable FEM meshability. More information about the model can be found on https://bkibret.com/model-description. Data files for the first version of Menelik can be found on: https://figshare.com/projects/Menelik_A_detailed_human_head_computational_model_data_/35474
Project
This project investigates applications of galvanic signal propagation through the human body, both for short range communications and sensing. Galvanic coupling confines the electrical signal within the body providing natural security unlike wireless RF. The low signal frequency results in lower bandwidth compared to UWB techniques. However, we are interested in low power applications e.g. implants, and new sensing methods such as body composition or hydration detection based on galvanic coupled signals. In addition, we have also investigated theoretical models of the human body to better understand electrical signal propagation through human tissue. Recently, we are interested in investigating the effect of signal propagation at the cellular level and looking at effects of high frequency electromagnetic energy including light (photonics).