An Improved Receiver for Harmonic Motion Microwave Doppler Imaging

Soydan, Damla Alptekin
Irgin, Umit
Top, Can Baris
Gençer, Nevzat Güneri
© 2020 EurAAP.Harmonic motion microwave Doppler imaging is a novel imaging modality that combines focused ultrasound and radar techniques to obtain data based on mechanical and electrical properties of the tissue. In previous experimental studies, the Doppler component of the scattered signal is sensed and used to create 2D images of a tumor inside a homogeneous fat phantom. Due to the drawbacks of the receiver configuration, scanning time was high, the signal-to-noise ratio was low, and the multi-frequency operation was limited. In this study, we improved the receiving system with a low noise amplifier which led to an increase in signal-to-noise ratio and a decrease in data acquisition time. A breast phantom containing a cylindrical tumor of size 3 mm \times 3 mm inside a homogeneous fat was built to perform 2D scans. An area of 40 mm \times 40 mm is scanned in 45 minutes which is approximately 50% of the previous scanning time. Multiple vibration frequencies between 15 Hz - 60 Hz are used to create 2D images. With the enhancement of the signal-to-noise ratio, vibration frequencies higher than 35 Hz are used for the first time. Increase in the vibration frequency resulted in the improvement of resolution; however, signal-to-noise ratio deteriorated due to the decrease in the vibration amplitude.


Received Signal in Harmonic Motion Microwave Doppler Imaging as a Function of Tumor Position in a 3D Scheme
IRGIN, Umit; TOP, Can Baris; TAFRESHI, Azadeh Kamali; Gençer, Nevzat Güneri (2017-02-08)
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 ...
Microwave Sensing of Acoustically Induced Local Harmonic Motion: Experimental and Simulation Studies on Breast Tumor Detection
top, Can Baris; TAFRESHI, Azadeh Kamali; Gençer, Nevzat Güneri (2016-11-01)
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...
Design and realization of a hybrid medical imaging system: harmonic motion microwave doppler imaging
Tafreshi, Azadeh Kamali; Gençer, Nevzat Güneri; Department of Electrical and Electronics Engineering (2016)
Harmonic Motion Microwave Doppler Imaging (HMMDI) is a novel imaging modality to image electrical and mechanical properties of body tissues. This modality is recently proposed by the researchers in the METU EEE department for early-stage diagnosis of cancerous tissues. The main goal of this thesis study is to contribute various stages of the HMMDI's development processes. Speci cally, phantom development, dielectric and elastic characterization of the phantoms, experimental system realization, phantom exper...
A Microwave Imaging Model for Biomedical Applications
ÖZGÜN, ÖZLEM; Kuzuoğlu, Mustafa (2017-07-14)
A microwave imaging model is presented for detection of breast cancer tissues by combining the finite element method and the transformation electromagnetics approach. An inverse scattering problem is formulated based on genetic optimization algorithm, and its expensive cost function evaluations are accelerated by using the transformation electromagnetics approach, which allows using a uniform or rectangular mesh even when irregular geometries are present inside the domain. Simulation results are demonstrate...
Data Acquisition System for Harmonic Motion Microwave Doppler Imaging
Tafreshi, Azadeh Kamali; Karadas, Muersel; Top, Can Baris; Gençer, Nevzat Güneri (2014-08-30)
Harmonic Motion Microwave Doppler Imaging (HMMDI) is a hybrid method proposed for breast tumor detection, which images the coupled dielectric and elastic properties of the tissue. In this paper, the performance of a data acquisition system for HMMDI method is evaluated on breast phantom materials. A breast fat phantom including fibro-glandular and tumor phantom regions is produced. The phantom is excited using a focused ultrasound probe and a microwave transmitter. The received microwave signal level is mea...
Citation Formats
D. A. Soydan, U. Irgin, C. B. Top, and N. G. Gençer, “An Improved Receiver for Harmonic Motion Microwave Doppler Imaging,” 2020, Accessed: 00, 2020. [Online]. Available: