Estimating the Breast Surface Using UWB Microwave Monostatic Backscatter Measurements

Winters, D.W.; Shea, Jacob D.; Madsen, Ernest L.; Frank, Gary R.; Veen, B.D. Van; Hagness, Susan C.

doi:10.1109/tbme.2007.901028

Cited by 97 publications

(56 citation statements)

References 31 publications

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“…59 Several approaches have been proposed for identifying the location and thickness of the skin layer. 60,61 The dielectric properties of the skin have been Norm FIG. 3.…”

Section: Iiif Assumptions and Initial Conditionsmentioning

confidence: 99%

Three‐dimensional microwave imaging of realistic numerical breast phantoms via a multiple‐frequency inverse scattering technique

et al. 2010

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Purpose: Breast density measurement has the potential to play an important role in individualized breast cancer risk assessment and prevention decisions. Routine evaluation of breast density will require the availability of a low-cost, nonionizing, three-dimensional ͑3-D͒ tomographic imaging modality that exploits a strong properties contrast between dense fibroglandular tissue and less dense adipose tissue. The purpose of this computational study is to investigate the performance of 3-D tomography using low-power microwaves to reconstruct the spatial distribution of breast tissue dielectric properties and to evaluate the modality for application to breast density characterization. Methods: State-of-the-art 3-D numerical breast phantoms that are realistic in both structural and dielectric properties are employed. The test phantoms include one sample from each of four classes of mammographic breast density. Since the properties of these phantoms are known exactly, these testbeds serve as a rigorous benchmark for the imaging results. The distorted Born iterative imaging method is applied to simulated array measurements of the numerical phantoms. The forward solver in the imaging algorithm employs the finite-difference time-domain method of solving the timedomain Maxwell's equations, and the dielectric profiles are estimated using an integral equation form of the Helmholtz wave equation. A multiple-frequency, bound-constrained, vector field inverse scattering solution is implemented that enables practical inversion of the large-scale 3-D problem. Knowledge of the frequency-dependent characteristic of breast tissues at microwave frequencies is exploited to obtain a parametric reconstruction of the dispersive dielectric profile of the interior of the breast. Imaging is performed on a high-resolution voxel basis and the solution is bounded by a known range of dielectric properties of the constituent breast tissues. The imaging method is validated using a breast phantom with a single, high-contrast interior scattering target in an otherwise homogeneous interior. The method is then used to image a set of realistic numerical breast phantoms of varied fibroglandular tissue density. Results: Imaging results are presented for each numerical phantom and show robustness of the method relative to tissue density. In each case, the distribution of fibroglandular tissues is well represented in the resulting images. The resolution of the images at the frequencies employed is wider than the feature dimensions of the normal tissue structures, resulting in a smearing of their reconstruction. Conclusions:The results of this study support the utility of 3-D microwave tomography for imaging the distribution of normal tissues in the breast, specifically, dense fibroglandular tissue versus less dense adipose tissue, and suggest that further investigation of its use for volumetric evaluation of breast density is warranted.

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“…59 Several approaches have been proposed for identifying the location and thickness of the skin layer. 60,61 The dielectric properties of the skin have been Norm FIG. 3.…”

Section: Iiif Assumptions and Initial Conditionsmentioning

confidence: 99%

Three‐dimensional microwave imaging of realistic numerical breast phantoms via a multiple‐frequency inverse scattering technique

et al. 2010

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“…7. Note that, in contrast with confocal microwave breast detection methods [1,2,[4][5][6][7][8][9], the contour surface of the breast does not have to be known or determined [17], which is a great advantage in clinical cases.…”

Section: Localization Algorithmmentioning

confidence: 99%

Wavelet-Based Breast Tumor Localization Technique Using a Uwb Radar

Lázaro

Girbau²,

Villarino³

2009

PIER

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Abstract-This paper deals with the potential of ultra-wideband (UWB) microwave imaging for the detection and localization of breast cancer in its early stages. A method is proposed for locating tumors which is based on the signal time-of-flight backscattered by the tumor. Time-of-flight is detected using a wavelet transform algorithm. The feasibility of the method has been investigated by means of simulated results using Finite-Difference Time-Domain (FDTD) and experimental results with a UWB radar and a phantom.

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“…Radar imaging, mobile and satellite communications, multimedia streaming, biomedical imaging are the most important application areas of ultrawideband systems [1][2][3][4][5]. The ultra-wideband systems have been further studied especially since Federal Communications Commission (FCC) approved the unlicensed use of the frequency range of 3.1-10.6 GHz for low power emitting implementations [6].…”

Section: Introductionmentioning

confidence: 99%

Microstrip-fed Triangular UWB Microstrip Antenna Based on DGS

Toktaş¹,

Yerlikaya²,

Yiğit³

2016

International Journal of Applied Mathematics, Electronics and Computers

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An ultra-wideband (UWB) monopole microstrip antenna is designed in this study. The design consists of a radiating triangular patch antenna (TPA) fed through a 50 Ohm microstrip transmission line (MTL) constructed over a defected ground structure (DGS). The triangular monopole well is matched to MTL with inserting a thin strip line. The performance of the proposed antenna is numerically investigated using method of moments (MoM) and verified through measurements. Based on the measured results, the antenna operates over large frequency range of 2.6-18.2 GHz at -10 dB. This makes the design suitable for UWB applications. The proposed antenna has better characteristics in terms of radiation pattern, peak gain and total efficiency across the operating ultra-wideband frequency range. Furthermore, the antenna system is suitable for near-millimetre wave applications, since the operating band reaches to 18.2 GHz.

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Estimating the Breast Surface Using UWB Microwave Monostatic Backscatter Measurements

Cited by 97 publications

References 31 publications

Three‐dimensional microwave imaging of realistic numerical breast phantoms via a multiple‐frequency inverse scattering technique

Three‐dimensional microwave imaging of realistic numerical breast phantoms via a multiple‐frequency inverse scattering technique

Wavelet-Based Breast Tumor Localization Technique Using a Uwb Radar

Microstrip-fed Triangular UWB Microstrip Antenna Based on DGS

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