NDLI: Resonantly loaded apertures for high-resolution near-field surface imaging

Content Provider	IET Digital Library
Author	Malyuskin, Oleksandr Fusco, Vincent
Abstract	A novel type of microwave probes based on the loaded aperture geometry has been proposed and experimentally evaluated for dielectrics characterisation and high-resolution near-field imaging. Experimental results demonstrate the possibility of very accurate microwave spectroscopic characterisation of thin lossy dielectric samples and biological materials containing water. High-resolution images of the subwavelength lossy dielectric strips and wet and dry leaves have been obtained with amplitude contrast around 10–20 dB and spatial resolution better than one-tenth of a wavelength in the near-field zone. A microwave imaging scenario for the early-stage skin cancer identification based on the artificial dielectric model has also been explored. This model study shows that the typical resolution of an artificial malignant tumour with a characteristic size of one-tenth of a wavelength can be discriminated with at least 6 dB amplitude and 50° phase contrast from the artificial healthy skin and with more than 3 dB contrast from a benign lesion of the same size. It has also been demonstrated that the proposed device can efficiently deliver microwave energy to very small, subwavelength, focal areas which is highly sought in the microwave hyperthermia applications.
Starting Page	783
Ending Page	791
Page Count	9
ISSN	17518822
Volume Number	9
e-ISSN	17518830
Issue Number	Issue 7, Oct (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/9/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2014.0337
Journal	IET Science, Measurement & Technology
Publisher Date	2015-04-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplitude Contrast Artificial Dielectric Model Artificial Healthy Skin Artificial Malignant Tumour Biological Effects of Microwaves Biological Materials Biology And Medical Computing Biomedical Imaging/measurement Cancer Computer Vision And Image Processing Technique Dielectric Material Dielectric Material And Property Dielectrics Characterisation High Resolution near Field Imaging Hyperthermia Industrial And Medical Application of MicroWave Loaded Aperture Geometry Medical Image Processing MicroWave And Other Electromagnetic Wave Microwave Hyperthermia Application Microwave Imaging Microwave Probe Microwave Spectroscopic Characterisation Microwave Spectroscopy Optical, Image And Video Signal Processing Phase Contrast Skin Skin Cancer Identification Spatial Resolution Subwavelength Lossy Dielectric Strip Thin Lossy Dielectric Sample Tumours
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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