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Reduced Graphene Oxide UWB Array Sensor: High Performance for Brain Tumor Imaging and Detection.

Mohd Aminudin Jamlos1,2, Mohd Faizal Jamlos3,4, Wan Azani Mustafa5

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|January 8, 2023
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Summary

A novel, low-cost reduced graphene oxide (RGO) Ultra-wide Band (UWB) sensor enables high-performance brain tumor detection using microwave imaging. This RGO sensor achieves accurate tumor localization with less than 2 cm error, offering a promising advancement in medical diagnostics.

Keywords:
UWB arraymicrowave imagingreduced graphene oxide (RGB)

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Electromagnetics

Background:

  • Brain tumor detection remains a critical challenge in medical diagnostics.
  • Existing microwave imaging techniques require high-performance, cost-effective sensors.
  • Reduced graphene oxide (RGO) offers unique properties for sensor development.

Purpose of the Study:

  • To develop and evaluate a low-cost, high-performance RGO Ultra-wide Band (UWB) array sensor for brain tumor detection.
  • To integrate the RGO UWB sensor with confocal radar-based microwave imaging for enhanced diagnostic capabilities.
  • To validate the sensor's performance using a human head phantom.

Main Methods:

  • Fabrication of an RGO array sensor on a Taconic substrate operating in the 1.2 to 10.8 GHz UWB frequency range.
  • Utilizing confocal radar-based microwave imaging with an improved delay-and-sum algorithm in MATLAB.
  • Scanning a multi-layered human head phantom (skin, fat, skull, brain) at nine points to detect simulated tumors.

Main Results:

  • The RGO UWB sensor exhibited a high gain of 5.2 to 14.5 dB and a compact size (90 mm × 45 mm²).
  • The developed microwave imaging system successfully differentiated between the presence and absence of a tumor in the phantom.
  • Tumor detection achieved an accuracy with an error margin of less than 2 cm.

Conclusions:

  • The presented RGO UWB array sensor is a viable, low-cost, high-performance solution for brain tumor detection via microwave imaging.
  • The sensor's small size and high gain facilitate integration into advanced medical imaging systems.
  • This technology shows significant potential for improving the accuracy and accessibility of brain tumor diagnostics.