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Sen Bing¹, Khengdauliu Chawang¹, Jung-Chih Chiao¹

¹Electrical and Computer Engineering, Southern Methodist University, Dallas, TX 75205, USA.

Sensors (Basel, Switzerland)

|March 30, 2023

Summary

This summary is machine-generated.

A new flexible imaging system uses electromagnetic waves to detect subcutaneous tissue abnormalities like breast tumors. This noninvasive technology offers a lower-cost, efficient method for medical imaging.

Keywords:

breast cancer nondestructive evaluation (NDE)phased array antenna subcutaneous imaging tumor tuned

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Area of Science:

Biomedical Engineering
Electromagnetics
Medical Imaging

Background:

Subcutaneous tissue abnormalities, such as breast tumors, require effective detection methods.
Existing imaging techniques may have limitations in cost, invasiveness, or resolution for certain applications.

Purpose of the Study:

To develop a compact, planar imaging system for distinguishing subcutaneous tissue abnormalities.
To utilize electromagnetic-wave interactions and permittivity variations for detecting abnormalities.

Main Methods:

A flexible polymer substrate housing a tuned loop resonator operating at 2.423 GHz (industrial, scientific, and medical band).
Utilizing resonant frequency shifts and reflection coefficient magnitudes to delineate abnormal tissue boundaries.
Implementing an image-processing method to fuse raster-scanned data for enhanced contrast.

Main Results:

Successfully indicated tumor location at a depth of 15 mm.
Identified two tumors at a depth of 10 mm.
Demonstrated improved field penetration depth from 19 mm to 42 mm with a phased array, enabling tumor detection up to 50 mm.

Conclusions:

The developed system shows significant potential for noninvasive, efficient, and lower-cost subcutaneous medical imaging.
The flexible, planar design and electromagnetic sensing approach offer a novel solution for early abnormality detection.
Further expansion to phased arrays enhances imaging depth and coverage, broadening clinical applicability.