Realistic human head voxel model for brain microwave imaging

2017 ◽  
Author(s):  
Amir Arayeshnia ◽  
Asghar Keshtkar ◽  
Shervin Amiri
Keyword(s):  
Human Head ◽  
Microwave Imaging ◽  
Voxel Model

Reflection Coefficient Measurement through the Implementation of Wideband Multi-Port Reflectometer with Error Correction for Microwave Imaging Application of Human Head

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Rashidah Che Yob ◽  
Norhudah Seman
Keyword(s):  
Reflection Coefficient ◽  
Error Correction ◽  
Human Head ◽  
Correction Method ◽  
Microwave Imaging ◽  
Passive Components ◽  
Power Dividers ◽  
Imaging Application ◽  
Coefficient Measurement ◽  
Design Systems

This article presents the reflection coefficient measurement by using a wideband multi-port reflectometer for microwave imaging application of human head. The configuration of the proposed wideband multi-port reflectometer is formed by passive components, which are four couplers and two power dividers operating from 1 to 6 GHz. The investigation is successfully done through simulation using the Agilent’s Advanced Design Systems (ADS) software and practical measurement in laboratory. An error correction method with three standards of match, open and short load is then applied to the constructed wideband multi-port reflectometer to remove its imperfect characteristics. The wideband characteristics of proposed reflectometer are analyzed and verified across the designated frequency band.  Its operation in reflection coefficient is tested with the chosen device under test (DUT).

scholarly journals EBG Based Microstrip Patch Antenna for Brain Tumor Detection via Scattering Parameters in Microwave Imaging System

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Reefat Inum ◽  
Md. Masud Rana ◽  
Kamrun Nahar Shushama ◽  
Md. Anwarul Quader
Keyword(s):  
Human Brain ◽  
Patch Antenna ◽  
Imaging System ◽  
Ground Plane ◽  
Human Head ◽  
Microstrip Patch Antenna ◽  
Microwave Imaging ◽  
Head Model ◽  
Imaging Algorithm ◽  
Microstrip Patch

A microwave brain imaging system model is envisaged to detect and visualize tumor inside the human brain. A compact and efficient microstrip patch antenna is used in the imaging technique to transmit equivalent signal and receive backscattering signal from the stratified human head model. Electromagnetic band gap (EBG) structure is incorporated on the antenna ground plane to enhance the performance. Rectangular and circular EBG structures are proposed to investigate the antenna performance. Incorporation of circular EBG on the antenna ground plane provides an improvement of 22.77% in return loss, 5.84% in impedance bandwidth, and 16.53% in antenna gain with respect to the patch antenna with rectangular EBG. The simulation results obtained from CST are compared to those obtained from HFSS to validate the design. Specific absorption rate (SAR) of the modeled head tissue for the proposed antenna is determined. Different SAR values are compared with the established standard SAR limit to provide a safety regulation of the imaging system. A monostatic radar-based confocal microwave imaging algorithm is applied to generate the image of tumor inside a six-layer human head phantom model. S-parameter signals obtained from circular EBG loaded patch antenna in different scanning modes are utilized in the imaging algorithm to effectively produce a high-resolution image which reliably indicates the presence of tumor inside human brain.

Modeling of Gelatin-Based Head Phantom Based on its Electrical Properties for Wideband Microwave Imaging Application

2015 ◽  
Vol 781 ◽  
pp. 608-611 ◽  
Author(s):  
Mohd Sollehudin Md Said ◽  
Norhudah Seman ◽  
Noor Redzuan Sulaiman ◽  
Tharek Abd Rahman
Keyword(s):  
Electrical Properties ◽  
Health Monitoring ◽  
Cerebral Spinal Fluid ◽  
Grey Matter ◽  
Imaging System ◽  
Human Head ◽  
Microwave Imaging ◽  
Imaging Application ◽  
Network Analyser ◽  
Investigation And Study

This article presents a human head phantom characterization based on the study of its electrical properties across 1 to 6 GHz. The study focuses on the grey matter, white matter, cerebral spinal fluid (CSF), blood and skin of human head. Through the investigation and study of the human head characteristics, its phantom can be modeled using simple and common materials, which are gelatin, water and sugar. The electrical properties of the chosen mixtures of materials mimicking the electrical properties of human head are measured using special dielectric probe connected to a vector network analyser (VNA). This human head phantom later can be applied in the microwave imaging system for a further study on the health monitoring of human body.

Detection of haemorrhagic stroke in simulation and realistic 3-D human head phantom using microwave imaging

2020 ◽  
Vol 61 ◽  
pp. 102001 ◽  
Author(s):  
Behnaz Sohani ◽  
Banafsheh Khalesi ◽  
Navid Ghavami ◽  
Mohammad Ghavami ◽  
Sandra Dudley ◽  
...  
Keyword(s):  
Human Head ◽  
Haemorrhagic Stroke ◽  
Microwave Imaging

scholarly journals Developing Artefact Removal Algorithms to Process Data from a Microwave Imaging Device for Haemorrhagic Stroke Detection

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5545
Author(s):  
Behnaz Sohani ◽  
James Puttock ◽  
Banafsheh Khalesi ◽  
Navid Ghavami ◽  
Mohammad Ghavami ◽  
...  
Keyword(s):  
Human Head ◽  
Haemorrhagic Stroke ◽  
Microwave Imaging ◽  
Ultra Wideband ◽  
Reference Image ◽  
Process Data ◽  
Imaging Device ◽  
Valid Comparison ◽  
Artefact Removal ◽  
Shaped Inclusion

In this paper, we present an investigation of different artefact removal methods for ultra-wideband Microwave Imaging (MWI) to evaluate and quantify current methods in a real environment through measurements using an MWI device. The MWI device measures the scattered signals in a multi-bistatic fashion and employs an imaging procedure based on Huygens principle. A simple two-layered phantom mimicking human head tissue is realised, applying a cylindrically shaped inclusion to emulate brain haemorrhage. Detection has been successfully achieved using the superimposition of five transmitter triplet positions, after applying different artefact removal methods, with the inclusion positioned at 0°, 90°, 180°, and 270°. The different artifact removal methods have been proposed for comparison to improve the stroke detection process. To provide a valid comparison between these methods, image quantification metrics are presented. An “ideal/reference” image is used to compare the artefact removal methods. Moreover, the quantification of artefact removal procedures through measurements using MWI device is performed.

Low SAR planar monopole antenna for wireless communication applications

2013 ◽  
Vol 5 (5) ◽  
pp. 621-627 ◽  
Author(s):  
Dalia M. Elsheakh ◽  
Esmat A. Abdallah
Keyword(s):  
Wireless Communication ◽  
Specific Absorption Rate ◽  
Simple Structure ◽  
Human Head ◽  
Beam Width ◽  
Monopole Antenna ◽  
Universal Serial Bus ◽  
Substrate Side ◽  
Voxel Model ◽  
Half Power

Simple internal multiband monopole antenna with low specific absorption rate (SAR) for most wireless communication applications is presented in this paper. The proposed antenna is an unequal arms monopole antenna with a meander stripoin the other substrate side. The antenna has a simple structure and it is sufficiently small in size to be easily fitted on the housing of a mobile phone or a universal serial bus (USB) dongle with size 20 × 50 × 0.8 mm3. The antenna is designed to operate in different bands to cover most of allocated wireless communication bands in the frequency range from 0.9 to 6 GHz. The proposed antenna has an acceptable average gain of about 2.75 dBi and an average efficiency of about 85% while providing a monopole radiation pattern in both horizontal and elevation planes, with average half-power beam width of 65° in the elevation plane. The simulation and the experimental results of the antenna are in agreement. The SAR in the human head is investigated by using CST 2012 Microwave Studio Hugo Voxel Model.

Characterization of Human Head Phantom based on its Dielectric Properties for Wideband Microwave Imaging Application

2015 ◽  
Vol 73 (6) ◽  
Author(s):  
Mohd Sollehudin Md Said ◽  
Norhudah Seman ◽  
Haliza Jaafar
Keyword(s):  
Electrical Properties ◽  
Imaging System ◽  
Human Head ◽  
Microwave Imaging ◽  
Imaging Application ◽  
Properties Of Materials ◽  
Materials Used ◽  
Composition Ratios ◽  
Coaxial Probe

Characterization of phantom material based on its electrical properties across 1 to 6 GHz is investigated and presented in purpose for modelling of a human head phantom. This article presents five phantom samples mimicking main head tissues, which are the tissue of grey matter, white matter, cerebral spinal fluid (CSF), blood and skin. The preparation of phantom samples is performed by using common and cheap materials, which are jelly powder, gelatine, water and sugar. The characteristics of materials used are discussed on the composition ratios and electrical properties. The electrical properties of materials are measured using a special dielectric coaxial probe connected to a vector network analyser (VNA). The obtained data is analysed in terms of relative permittivity,  and conductivity,  for the observation and further discussion on the characterizations. This phantom of the human head tissues later can be applied in the microwave imaging system for a further study on the health monitoring of the human body.

Low SAR reconfigurable multiband planar inverted-F antenna for wireless communication applications

2014 ◽  
Vol 7 (2) ◽  
pp. 185-194
Author(s):  
Ahmed M. Soliman ◽  
Dalia M. Elsheakh ◽  
Esmat A. Abdallah
Keyword(s):  
Wireless Communication ◽  
Resonant Frequency ◽  
Specific Absorption Rate ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Human Head ◽  
Handheld Devices ◽  
Pin Diode ◽  
Resonant Frequencies ◽  
Voxel Model

A low specific absorption rate (SAR) reconfigurable multiband coplanar waveguide fed planar inverted-F antenna (PIFA) is presented in this paper. Different numbers of meander-turn-shaped slots are etched on the PIFA radiating plate to excite new resonant frequencies. Extra resonant frequencies are created by increasing the number of meander-turn-shaped slots for different wireless communication applications. A new independent resonant frequency is created by etching a coupled slot within the ground plane for the upper WLAN. A PIN diode switch is used to reconfigure the fundamental resonant frequency from the LTE band 11 to band 8 with a total of 63% size reduction compared with the original PIFA size. Furthermore, the SAR in the human head is investigated using the Hugo voxel model in CST Microwave Studio. The volume of the antenna is 22 × 30 mm2over a 35 × 50 mm2ground plane, which is suitable for handheld devices.

Human Head Impact Analysis using a Voxel Model

2004 ◽  
Vol 2004.5 (0) ◽  
pp. 149-150
Author(s):  
Dai WATANABE ◽  
Kohei YUGE ◽  
Kohei TOMONAGA ◽  
Tetsuya NISHIMOTO ◽  
Susumu EJIMA ◽  
...  
Keyword(s):  
Impact Analysis ◽  
Human Head ◽  
Head Impact ◽  
Voxel Model
Sign in / Sign up

Export Citation Format

Share Document