Image quality enhancement in the microwave raster scanning method

Khalatpour, Ali; Amineh, Reza K.; Xu, Haohan; Baskharoun, Yona; Nikolova, Natalia K.

doi:10.1109/mwsym.2011.5972875

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…It is a simple and fast image acquisition method, where water was used initially as a coupling liquid between the antenna and tissue [14], but at the cost of supplementary loss, complicated system maintenance and limited resolution [15]. The need for coupling liquid can be eliminated with antenna size reduction using aperture raster scan [15,16]. However, such a scanning method is a two steps process; first it requires a scan of the breast phantom with tumors absent, which is the background for farther imaging, and secondly one needs to subtract the background from the image when the tumors are present.…”

Section: Introductionmentioning

confidence: 99%

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Al-Zuhairi¹,

Gahl²,

Al-Azzawi³

et al. 2017

PIER C

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Abstract-A distortion-less ultra-wideband tapered slot antenna is designed to achieve wide band impedance matching and high gain without requiring coupling liquids. The antenna is embedded in a suitable dielectric material for compact size and performance improvement. The near-field test is simulated by placing several field probes near the antenna to plot the radiation pattern and polarization isolation. The antenna exhibits a highly directive pattern and polarization isolation in near field. The time domain antenna distortion is tested by calculating the fidelity and group delay. The results show low distortion and also show the importance of covering the antenna by dielectric layers for bandwidth increment and distortion reduction. To evaluate the antenna performance in breast cancer detection, three breast phantoms are imaged by using the raster scan imaging method. Two approaches are proposed to detect tumors without the need of breast background data. The approaches based on the effect of the tumor on transmission and reflection parameters on the frequency band allowed for medical applications. The obtained images show the antenna to be a strong candidate for breast imaging as well as in tumor detection for different scenarios that include complex multi-layer phantom and small tumor.

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Section: Introductionmentioning

confidence: 99%

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Al-Zuhairi¹,

Gahl²,

Al-Azzawi³

et al. 2017

PIER C

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show abstract

“…However, this is not the case when in real practice we deal with non-point-wise antennas. In [ 12 ], we discussed that when we employ a real antenna structure to collect the data, additional processing is required prior to applying holographic image reconstruction. We employed blind de-convolution (deblurring) to eliminate the integration (blurring) effect of the non-point-wise antenna aperture.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Near-Field Microwave Holography for Tissue Imaging

Amineh

Khalatpour

et al. 2012

International Journal of Biomedical Imaging

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This paper reports the progress toward a fast and reliable microwave imaging setup for tissue imaging exploiting near-field holographic reconstruction. The setup consists of two wideband TEM horn antennas aligned along each other's boresight and performing a rectangular aperture raster scan. The tissue sensing is performed without coupling liquids. At each scanning position, wideband data is acquired. Then, novel holographic imaging algorithms are implemented to provide three-dimensional images of the inspected domain. In these new algorithms, the required incident field and Green's function are obtained from numerical simulations. They replace the plane (or spherical) wave assumption in the previous holographic methods and enable accurate near-field imaging results. Here, we prove that both the incident field and Green's function can be obtained from a single numerical simulation. This eliminates the need for optimization-based deblurring which was previously employed to remove the effect of realistic non-point-wise antennas.

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Image quality enhancement in the microwave raster scanning method

Cited by 2 publications

References 8 publications

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Three-Dimensional Near-Field Microwave Holography for Tissue Imaging

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