Dielectric Properties of Certain Biological Materials at Microwave Frequencies

In the medical field, microwaves play a larger role for treatment than diagnosis. For the detection of diseases by microwave methods, it is essential to know the dielectric properties of biological materials. For the present study, a cavity perturbation technique was employed to determine the dielec...

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Bibliographic Details
Published in:The Journal of microwave power and electromagnetic energy 2001-01, Vol.36 (2), p.67-75
Main Authors: Biju-Kumar, S., Mathew, K.T., Raveendranath, U., Augustine, P.
Format: Article
Language:English
Subjects:
Bile - physiology
Biological materials
Choledocholithiasis - physiopathology
Cholelithiasis - physiopathology
Electric Capacitance
Electric Impedance
Humans
Microwaves
Models, Biological
perrnittiv cavity resonators
perturbation technique
Saliva - physiology
Urinary Bladder Calculi - physiopathology
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Summary:In the medical field, microwaves play a larger role for treatment than diagnosis. For the detection of diseases by microwave methods, it is essential to know the dielectric properties of biological materials. For the present study, a cavity perturbation technique was employed to determine the dielectric properties of these materials. Rectangular cavity resonators were used to measure the complex permittivity of human bile, bile stones, gastric juice and saliva. The measurements were carried out in the S and J bands. It is observed that normal and infected bile have different dielectric constant and loss tangent. Dielectric constant of infected bile and gastric juice varies from patient to patient. Detection and extraction of bile stone with possible method of treatment is also discussed.
ISSN:0832-7823
DOI:10.1080/08327823.2001.11688450