A Numerical Study of Influence of a Matching Medium on Transmission Coefficients between Antennas Used in Microwave Imaging System

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21460%2F18%3A00323993" target="_blank" >RIV/68407700:21460/18:00323993 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

A Numerical Study of Influence of a Matching Medium on Transmission Coefficients between Antennas Used in Microwave Imaging System

Popis výsledku v původním jazyce

New perspective methods for medical imaging are constantly developing and improving in present time. One of these methods is so-called Microwave Imaging (MWI), which uses non-harmful and non-ionizing microwave radiation and its research is focused mainly on two areas, breast cancer detection and brain stroke classification. At ELEDIA@CTU research centre was developed the prototype of MWI system for brain stroke detection and classification. For testing of the prototype, realistic phantoms of a human head are fabricating. To provide ideal contact between antennas used in MWI system and phantom matching mediums are using. The contribution presents some numerical results of the influence of three different matching mediums to transmission coefficients (S parameters) measured by MWI system in the environment of numerical simulator COMSOL Multiphysics. Numerical simulations showed that for distilled water used as matching medium the highest values of transmission coefficients (-50 dB) are gained but these values are distorted by low conductivity of distilled water which caused propagation of EM wave through matching medium and not through phantom of human head. On the contrary more realistic results but lower values of transmission coefficients (-70 dB) are gained with mineral/salt water or ethanol used as matching medium. Results will help in near future to improve experiments with MWI system and heterogeneous layered realistic phantom where matching medium needs to be filled between antennas and phantom of human head.

Název v anglickém jazyce

A Numerical Study of Influence of a Matching Medium on Transmission Coefficients between Antennas Used in Microwave Imaging System

Popis výsledku anglicky

New perspective methods for medical imaging are constantly developing and improving in present time. One of these methods is so-called Microwave Imaging (MWI), which uses non-harmful and non-ionizing microwave radiation and its research is focused mainly on two areas, breast cancer detection and brain stroke classification. At ELEDIA@CTU research centre was developed the prototype of MWI system for brain stroke detection and classification. For testing of the prototype, realistic phantoms of a human head are fabricating. To provide ideal contact between antennas used in MWI system and phantom matching mediums are using. The contribution presents some numerical results of the influence of three different matching mediums to transmission coefficients (S parameters) measured by MWI system in the environment of numerical simulator COMSOL Multiphysics. Numerical simulations showed that for distilled water used as matching medium the highest values of transmission coefficients (-50 dB) are gained but these values are distorted by low conductivity of distilled water which caused propagation of EM wave through matching medium and not through phantom of human head. On the contrary more realistic results but lower values of transmission coefficients (-70 dB) are gained with mineral/salt water or ethanol used as matching medium. Results will help in near future to improve experiments with MWI system and heterogeneous layered realistic phantom where matching medium needs to be filled between antennas and phantom of human head.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GJ17-00477Y" target="_blank" >GJ17-00477Y: Fyzikální podstata interakcí EM pole generovaného MTM strukturami s lidským tělem a studie možnosti jejich perspektivního využití v medicíně</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2018 Progress In Electromagnetics Research Symposium (PIERS | Toyama)

ISBN

9784885523151

ISSN

—

e-ISSN

1931-7360

Počet stran výsledku

5

Strana od-do

1076-1080

Název nakladatele

Electromagnetics Academy

Místo vydání

Cambridge

Místo konání akce

Toyama

Datum konání akce

1. 8. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000458673700190