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Microwave Sensing of Acoustically Induced Local Harmonic Motion: Experimental and Simulation Studies on Breast Tumor Detection
Date
2016-11-01
Author
top, Can Baris
TAFRESHI, Azadeh Kamali
Gençer, Nevzat Güneri
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Sensing acoustically induced local harmonic motion using a microwave transceiver system may provide useful information for detecting nonpalpable tumors in dense breast tissue. For this purpose, we propose the harmonic motion microwave Doppler imaging method, in which the first harmonic of the phase modulated signal due to local harmonic motion is sensed. This signal is related to the dielectric, elastic, and acoustic properties of the vibrating region. The purpose of this paper is twofold: 1) to demonstrate the concept of this method with experiments using phantom materials mimicking the elastic and electrical properties of the breast tissue and 2) to investigate the effect of fibroglandular region size and vibration frequency on the received signal, using numerical simulations. A breast phantom with a tumor phantom inclusion (5-mm diameter and 7-mm height) inside fibroglandular region is constructed for the experimental study. The response due to a focused ultrasound probe is linearly scanned at 30-mm depth from the phantom surface, and the Doppler signal level is tracked using a spectrum analyzer. It is shown that the tumor phantom is resolvable inside the surrounding fibroglandular region with about a 3-5-dB decrease in the signal level. The simulations, using the finite-difference time-domain method, show that the received signal level depends on the relative size of the fibroglandular region with respect to the vibrating region size. Further experimental and numerical studies are needed to investigate the feasibility of this method and to optimize the imaging system design.
Subject Keywords
Breast tumor detection
,
Elasticity imaging
,
Focused ultrasound (FUS)
,
Harmonic motion imaging
,
Microwave imaging
URI
https://hdl.handle.net/11511/34290
Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
DOI
https://doi.org/10.1109/tmtt.2016.2607713
Collections
Department of Electrical and Electronics Engineering, Article
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Harmonic Motion Microwave Doppler Imaging method, which was proposed as an alternative method for breast tumor detection, is a combination of microwave radar and focused ultrasound techniques yielding data depending on electrical and mechanical properties of the tissue. In this study, Harmonic Motion Microwave Doppler Imaging data from a small tumor inside homogeneous fat is analyzed as a function of tumor location on three orthogonal planes using Finite Difference Time Domain simulations. The results show ...
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C. B. top, A. K. TAFRESHI, and N. G. Gençer, “Microwave Sensing of Acoustically Induced Local Harmonic Motion: Experimental and Simulation Studies on Breast Tumor Detection,”
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
, pp. 3974–3986, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34290.