TDOA-based microwave imaging algorithm for real-time monitoring of microwave ablation

Kidera, Shouhei; Neira, Luz Maria; Veen, B.D. Van; Hagness, Susan C.

doi:10.23919/eucap.2017.7928203

Cited by 2 publications

(3 citation statements)

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“…Microwave imaging is a safe clinical imaging procedure that utilizes a non-radiative method to detect tumors, insufficiencies, and disorders based on the signal reflected by the tested tissue. This imaging method can be used to evaluate the acute and chronic functional and pathological conditions of soft or hard tissues because of the economic cost of construction and maintenance and availability in different conditions [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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A Novel UWB Antenna Integrated with Active Circuit for High Resolution Near Field Microwave Brain Imaging

Goodarzi¹

2022

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<p>In this paper, we will investigate, design, and construction of a compact ultrawideband antenna that has been amplified utilizing an active amplifier circuit to be used in microwave imaging. There are some principal features regarding the proposed antenna: simple design, compact and small dimensions, and bandwidth. We utilize the Monopole antenna powered by Coplanar Waveguide CPW to diagnose strokes and brain tumors in a heterogeneous brain environment. The wide bandwidth of the designed antenna has been achieved by producing a slot on the ground, forming a non-uniform structure, and applying a split-ring resonator. The size of the designed compact antenna is equal to 0.1𝜆×0.08𝜆×0.005𝜆, which is placed on a substrate of FR-4 material and has a full connection with the biological tissue of the head. The outcomes of simulations and construction confirm that the designed antenna has impedance bandwidth specifications of 1 to 6 GHz (10 dB), efficiency more than 90%, specific absorption rate 0.007 W/Kg, fidelity factor higher than 70%, near field directivity more than 93% and homogeneity more than 90% of the field in the center of the phantom. The proposed active circuits also have impedance bandwidth specifications of 1 to 6 GHz, a gain of more than 10 dB, and a noise of less than 3 dB.</p>

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Section: Introductionmentioning

confidence: 99%

“…Various UWB antennas have been designed and manufactured for MWI applications [4, 6, and 8]. These antennas can image the brain [8], bone [9], lung [10], breast [6], heart [1], and liver [11].…”

Section: Introductionmentioning

confidence: 99%

A Novel UWB Antenna Integrated with Active Circuit for High Resolution Near Field Microwave Brain Imaging

Goodarzi¹

2022

Preprint

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“…This paper presents a comprehensive theoretical investigation of a novel real-time imaging algorithm for MWA monitoring [16], which exploits the time difference of arrival (TDOA) between transmitted signals recorded before and at a specific time point during the ablation. Our proposed algorithm comprises computationally efficient signal processing steps, namely, cross-correlation calculations to determine time delays between received signals and a simple noise reduction filter (e.g.…”

Section: Introductionmentioning

confidence: 99%

TDOA-based microwave imaging algorithm for real-time microwave ablation monitoring

Kidera

Neira

Veen

et al. 2017

Int. J. Microw. Wireless Technol.

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Microwave ablation is widely recognized as a promising minimally invasive tool for treating cancer. Real-time monitoring of the dimensions of the ablation zone is indispensable for ensuring an effective and safe treatment. In this paper, we propose a microwave imaging algorithm for monitoring the evolution of the ablation zone. Our proposed algorithm determines the boundary of the ablation zone by exploiting the time difference of arrival (TDOA) between signals received before and during the ablation at external antennas surrounding the tissue, using the interstitial ablation antenna as the transmitter. A significant advantage of this method is that it requires few assumptions about the dielectric properties of the propagation media. Also the simplicity of the signal processing, wherein the TDOA is determined from a cross-correlation calculation, allows real-time monitoring and provides robust performance in the presence of noise. We investigate the performance of this approach for the application of breast tumor ablation. We use simulated array measurements obtained from finite-difference time-domain simulations of magnetic resonance imaging-derived numerical breast phantoms. The results demonstrate that our proposed method offers the potential to achieve millimeter-order accuracy and real-time operation in estimating the boundary of the ablation zone in heterogeneous and dispersive breast tissue.

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TDOA-based microwave imaging algorithm for real-time monitoring of microwave ablation

Cited by 2 publications

References 12 publications

A Novel UWB Antenna Integrated with Active Circuit for High Resolution Near Field Microwave Brain Imaging

A Novel UWB Antenna Integrated with Active Circuit for High Resolution Near Field Microwave Brain Imaging

TDOA-based microwave imaging algorithm for real-time microwave ablation monitoring

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