Microwave Biomedical Imaging

Nikolova, Natalia K.

doi:10.1002/047134608x.w8214

Cited by 45 publications

(32 citation statements)

References 132 publications

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“…However, permission to use this material for any other purposes must be obtained from the IEEE by sending a request to pubs-permissions@ieee.org. microwave techniques do not use ionizing radiation [2] and thus breast scans can safely be performed frequently, making them excellent candidates for diagnostic breast screening.…”

Section: Introductionmentioning

confidence: 99%

A Wearable Microwave Antenna Array for Time-Domain Breast Tumor Screening

Porter

Bahrami

Santorelli

et al. 2016

IEEE Trans. Med. Imaging

170

101

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Abstract-In this work, we present a clinical prototype with a wearable patient interface for microwave breast cancer detection. The long-term aim of the prototype is a breast health monitoring application. The system operates using multistatic time-domain pulsed radar, with 16 flexible antennas embedded into a bra. Unlike the previously reported, table-based prototype with a rigid cup-like holder, the wearable one requires no immersion medium and enables simple localization of breast surface. In comparison with the table-based prototype, the wearable one is also significantly more cost-effective and has a smaller footprint. To demonstrate the improved functionality of the wearable prototype, we here report the outcome of daily testing of the new, wearable prototype on a healthy volunteer over a 28-day period. The resulting data (both signals and reconstructed images) is compared to that obtained with our table-based prototype. We show that the use of the wearable prototype has improved the quality of collected volunteer data by every investigated measure. This work demonstrates the proof-of-concept for a wearable breast health monitoring array, which can be further optimized in the future for use with patients with various breast sizes and tissue densities.

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Section: Introductionmentioning

confidence: 99%

A Wearable Microwave Antenna Array for Time-Domain Breast Tumor Screening

Porter

Bahrami

Santorelli

et al. 2016

IEEE Trans. Med. Imaging

170

101

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“…[1][2][3][4][5][6]. The scanning hardware usually employs acquisition surfaces of canonical shapes: planar, cylindrical, or hemispherical, which simplifies the reconstruction process.…”

Section: Introductionmentioning

confidence: 99%

Optimal Illumination Schemes for Near-Field Microwave Imaging

Shumakov¹,

Beaverstone²,

Nikolova³

2016

PIER

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Abstract-Axial-null illumination (ANI) is proposed to simplify the calibration of microwave imaging systems. The illumination also enhances the spatial resolution. ANI can be achieved with various array configurations, but a minimum of two transmitting antennas are required, which is a well-known form of differential illumination. Here, ANI is achieved with four transmitting antennas, and its implementation is investigated in a planar scanning scenario. The receiving antenna resides at the radiation null of the ANI array. Back-scattered reception requires an antenna at the center of the ANI array whereas forward-scattered reception requires an antenna aligned with the ANI axis, but on the opposite side of the imaged volume. The most important advantage of the proposed imaging setup is that it eliminates the need for background (or baseline) measurements, thus simplifying the system calibration. Also, it is proven that at least two-fold improvement in the spatial resolution can be achieved in near-field imaging scenarios compared to the conventional single-source illumination.

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“…There is significant ongoing research toward the use of microwaves to diagnose cancer in human tissue at an early stage [1]. In one implementation, imaging of breast-tissue phantoms is accomplished with a planar raster scan [2].…”

Section: Introductionmentioning

confidence: 99%

Switched sensor array for near-field microwave imaging of tissue

Beaverstone

Nikolova

2015

2015 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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This paper describes the design of an electronicallyswitched active antenna array for near-field microwave imaging of tissue in the range of 6 to 8 GHz. Each antenna element connects directly to a dedicated radio front-end, whose intermediate frequency output is fed to a common port for digital data processing. In this way, the difficulties of designing reproducible microwave switching and feeding networks are avoided. Within each front-end, switched-bias low-noise amplifiers are used to maximize the difference in received power between the on and off states of the imaging sensors, thereby enhancing the dynamic range of the measurement.

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Microwave Biomedical Imaging

Cited by 45 publications

References 132 publications

A Wearable Microwave Antenna Array for Time-Domain Breast Tumor Screening

A Wearable Microwave Antenna Array for Time-Domain Breast Tumor Screening

Optimal Illumination Schemes for Near-Field Microwave Imaging

Switched sensor array for near-field microwave imaging of tissue

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