Microwave imaging using indirect holographic techniques

Smith, D.; Yurduseven, Okan; Livingstone, B.; Schejbal, Vladimír

doi:10.1109/map.2014.6821762

Cited by 49 publications

(22 citation statements)

References 34 publications

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“…Because of this important capability, a considerable amount of research has been reported in the literature demonstrating the use of microwaves for various imaging applications, including medical imaging [1][2][3][4], through-wall imaging [5][6][7][8] and concealed ordnance imaging [9][10][11][12]. Most conventional imaging approaches employed in these applications can be understood as versions of synthetic aperture radar (SAR) [13] and microwave holographic imaging [14,15] techniques, both of which involve the use of a mechanically scanned transmitter to sequentially acquire scene data. Although promising results have been achieved using these known techniques, a remaining and significant challenge is the long imaging time required due to the mechanical movement of the antennas across the sampling points over the imaging scene.…”

Section: Introductionmentioning

confidence: 99%

Resolution of the Frequency Diverse Metamaterial Aperture Imager

Yurduseven¹,

Imani²,

Odabasi³

et al. 2015

PIER

116

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Abstract-The resolution of a frequency diverse compressive metamaterial aperture imager is investigated. The aperture consists of a parallel plate waveguide, in which an array of complementary, resonant metamaterial elements is patterned into one of the plates. Microwaves injected into the waveguide leak out through the resonant metamaterial elements, forming a spatially diverse waveform at the scene. As the frequency is scanned, the waveforms change, such that scene information can be encoded onto a set of frequency measurements. The compressive nature of the metamaterial imager enables image reconstruction from a significantly reduced number of measurements. We characterize the resolution of this complex aperture by studying the simulated point spread function (PSF) computed using different image reconstruction techniques. We compare the imaging performance of the system with that expected from synthetic aperture radar (SAR) limits.

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Section: Introductionmentioning

confidence: 99%

Resolution of the Frequency Diverse Metamaterial Aperture Imager

Yurduseven¹,

Imani²,

Odabasi³

et al. 2015

PIER

116

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“…Often, a large aperture is synthesized by mechanical raster scanning, such as that used in synthetic aperture radar (SAR) 1,2 and holographic 3,4 techniques. Electrical beam forming can also be used to interrogate a scene, such as in phased arrays.…”

mentioning

confidence: 99%

Computational imaging using a mode-mixing cavity at microwave frequencies

Fromentèze

Yurduseven

Imani

et al. 2015

Applied Physics Letters

165

122

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International audienceWe present a 3D computational imaging system based on a mode-mixing cavity at microwavefrequencies. The core component of this system is an electrically large rectangular cavity with onecorner re-shaped to catalyze mode mixing, often called a Sinai Billiard. The front side of the cavityis perforated with a grid of periodic apertures that sample the cavity modes and project them intothe imaging scene. The radiated fields are scattered by the scene and are measured by low gainprobe antennas. The complex radiation patterns generated by the cavity thus encode the scene informationonto a set of frequency modes. Assuming the first Born approximation for scatteringdynamics, the received signal is processed using computational methods to reconstruct a 3D imageof the scene with resolution determined by the diffraction limit. The proposed mode-mixing cavityis simple to fabricate, exhibits low losses, and can generate highly diverse measurement modes.The imaging system demonstrated in this letter can find application in security screening and medicaldiagnostic imaging

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“…Recently, Smith et al [40][41][42][43] proposed a near-field indirect HMI method, which involves recording the holographic intensity pattern and reconstructing the image by using Fourier transformation from the recorded intensity pattern. Compared to TSAR, indirect HMI has the ability to produce real-time image at a significantly low cost.…”

Section: New Perspectives In Breast Imagingmentioning

confidence: 99%

Microwave Breast Imaging Techniques and Measurement Systems

Wang¹,

Hu²,

Ma³

2017

New Perspectives in Breast Imaging

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Electromagnetic waves at microwave frequencies allow penetration into many optically non-transparent mediums such as biological tissues. Over the past 30 years, researchers have extensively investigated microwave imaging (MI) approaches including imaging algorithms, measurement systems and applications in biomedical fields, such as breast tumor detection, brain stroke detection, heart imaging and bone imaging. Successful clinical trials of MI for breast imaging brought worldwide excitation, and this achievement further confirmed that the MI has potential to become a low-risk and cost-effective alternative to existing medical imaging tools such as X-ray mammography for early breast cancer detection. This chapter offers comprehensive descriptions of the most important MI approaches for early breast cancer detection, including reconstruction procedures and measurement systems as well as apparatus.

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Microwave imaging using indirect holographic techniques

Cited by 49 publications

References 34 publications

Resolution of the Frequency Diverse Metamaterial Aperture Imager

Resolution of the Frequency Diverse Metamaterial Aperture Imager

Computational imaging using a mode-mixing cavity at microwave frequencies

Microwave Breast Imaging Techniques and Measurement Systems

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