Image restoration in chirp-pulse microwave CT (CP-MCT)

Bertero, M.; Miyakawa, Michio; Boccacci, Patrizia; Conte, Francesco; Orikasa, K.; Furutani, M.

doi:10.1109/10.841341

Cited by 81 publications

(50 citation statements)

References 13 publications

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“…Two different classes of active microwave imaging techniques exploit contrasts in dielectric properties: tomographic methods and backscatter methods. The goal of microwave tomography is the recovery of the dielectric-properties profile of an object from measurements of the microwave energy transmitted through the object (for example, see [12]- [16]). Promising initial experimental results for breast imaging have been obtained recently [17], [18].…”

mentioning

confidence: 99%

Confocal microwave imaging for breast cancer detection: localization of tumors in three dimensions

Fear

Hagness

et al. 2002

IEEE Trans. Biomed. Eng.

767

513

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Abstract-The physical basis for breast tumor detection with microwave imaging is the contrast in dielectric properties of normal and malignant breast tissues. Confocal microwave imaging involves illuminating the breast with an ultra-wideband pulse from a number of antenna locations, then synthetically focusing reflections from the breast. The detection of malignant tumors is achieved by the coherent addition of returns from these strongly scattering objects. In this paper, we demonstrate the feasibility of detecting and localizing small ( 1 cm) tumors in three dimensions with numerical models of two system configurations involving synthetic cylindrical and planar antenna arrays. Image formation algorithms are developed to enhance tumor responses and reduce early-and late-time clutter. The early-time clutter consists of the incident pulse and reflections from the skin, while the late-time clutter is primarily due to the heterogeneity of breast tissue. Successful detection of 6-mm-diameter spherical tumors is achieved with both planar and cylindrical systems, and similar performance measures are obtained. The influences of the synthetic array size and position relative to the tumor are also explored.

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mentioning

confidence: 99%

Confocal microwave imaging for breast cancer detection: localization of tumors in three dimensions

Fear

Hagness

et al. 2002

IEEE Trans. Biomed. Eng.

767

513

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“…More specifically, one of these interesting signals is the chirped microwave pulse with the main characteristic of having a frequency variation along the time duration pulse, which involves a large bandwidth signal processing. Among the diverse applications where chirped microwave pulses are used, spread spectrum communications, pulsed compression radars or tomography for medical imaging [9][10][11] can be highlighted.…”

Section: Introductionmentioning

confidence: 99%

Experimental photonic generation of chirped pulses using nonlinear dispersion-based incoherent processing

et al. 2015

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We experimentally demonstrate, for the first time, a chirped microwave pulses generator based on the processing of an incoherent optical signal by means of a nonlinear dispersive element. Different capabilities have been demonstrated such as the control of the timebandwidth product and the frequency tuning increasing the flexibility of the generated waveform compared to coherent techniques. Moreover, the use of differential detection improves considerably the limitation over the signalto-noise ratio related to incoherent processing.

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“…Several applications benefit from these features, such as spread spectrum communications, pulsed compression radars or tomography for medical imaging [8][9][10]. Firstly, a coherent nonlinear frequency-to-time mapping in a highorder dispersive element was proposed [11,12].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dispersion-based incoherent photonic processing for microwave pulse generation with full reconfigurability

Bolea¹,

Mora²,

Ortega³

et al. 2012

Opt. Express

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Abstract:A novel all-optical technique based on the incoherent processing of optical signals using high-order dispersive elements is analyzed for microwave arbitrary pulse generation. We show an approach which allows a full reconfigurability of a pulse in terms of chirp, envelope and central frequency by the proper control of the second-order dispersion and the incoherent optical source power distribution, achieving large values of timebandwidth product. 690-699 (2000). 11. C. Wang and J. Yao, "Photonic generation of chirped millimeter-wave pulses based on nonlinear frequency-totime mapping in a nonlinearly chirped fiber Bragg grating," IEEE Trans. Microw. Theory Tech. 56(2), 542-553 (2008). 12. H. Chi and J. Yao, "All-fiber chirped microwave pulses generation based on spectral shaping and wavelength-totime conversion," IEEE Trans. Microw. Theory Tech. 55(9), 1958-1963 (2007). 13. C. Wang and J. Yao, "Chirped microwave pulse generation based on optical spectral shaping and wavelength-totime mapping using a Sagnac-loop mirror incorporating a chirped fiber Bragg grating," J. Lightwave Technol. ©2012 Optical Society of America

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Image restoration in chirp-pulse microwave CT (CP-MCT)

Cited by 81 publications

References 13 publications

Confocal microwave imaging for breast cancer detection: localization of tumors in three dimensions

Confocal microwave imaging for breast cancer detection: localization of tumors in three dimensions

Experimental photonic generation of chirped pulses using nonlinear dispersion-based incoherent processing

Nonlinear dispersion-based incoherent photonic processing for microwave pulse generation with full reconfigurability

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