Enhancement of a Microwave Radiometry Imaging System's Performance Using Left Handed Materials

Giamalaki, Melpomeni; Karanasiou, Irene S.

doi:10.2528/pier11042003

Cited by 10 publications

(9 citation statements)

References 17 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This leads to the ultrasound imaging can not provide a high contrast in early breast cancer detection. Therefore, there has been a great deal of interests in new breast cancer detection techniques in recent years [4][5][6][7][8][9][10]. Microwave imaging has been researched in early breast cancer detection in [4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Integrated Simulation Approach and Experimental Research on Microwave Induced Thermo-Acoustic Tomography System

Song¹,

Zhao²,

Wang³

et al. 2013

PIER

View full text Add to dashboard Cite

Abstract-Microwave induced thermo-acoustic tomography (MI-TAT) has great potential in early breast cancer detection because it utilizes the advantages of both microwave imaging and ultrasound imaging. In this paper, a fast and efficient simulation approach based on a hybrid method which combines finite integration time domain (FITD) method and pseudo-spectral time domain (PSTD) method is developed. By using this approach, energy deposition of biology tissue illuminated by electromagnetic fields can be accurately simulated. Meanwhile, acoustic properties of the tissue can be efficiently simulated as well. Based on this approach, a MITAT model is created and some simulated results are analyzed. Furthermore, some real breast tissues are adopted to perform the thermo-acoustic imaging experiment. Comparisons between experimental and simulated results are made. The feasibility and effectiveness of the proposed approach are demonstrated by both numerical simulations and experimental results.

show abstract

Section: Introductionmentioning

confidence: 99%

“…It takes the advantage of high contrast in the dielectric properties between malignant and normal tissues for microwave frequency spectrum. However, it has the drawback of low spatial resolution due to the relatively long wavelength [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Simulation Approach and Experimental Research on Microwave Induced Thermo-Acoustic Tomography System

Song¹,

Zhao²,

Wang³

et al. 2013

PIER

View full text Add to dashboard Cite

show abstract

“…The computation of (2) or (3) is a convex optimization problem, and can be solved efficiently using linear programming methods. This is the foundation for the Basis Pursuit (BP) techniques [12].…”

Section: Principles Of Csmentioning

confidence: 99%

“…Microwave radiometers are powerful sensors for high-resolution observations of the Earth at relatively low frequencies [1,2]. The low microwave frequency range offers high penetration ability through clouds and into the top layer of the Earth surface.…”

Section: Introductionmentioning

confidence: 99%

A Compressive Sensing Approach for Synthetic Aperture Imaging Radiometers

Li¹,

Zhou²,

Ren³

et al. 2013

PIER

View full text Add to dashboard Cite

Abstract-The aperture synthesis technology represents a promising new approach to microwave radiometers for high-resolution observations of the Earth from geostationary orbit. However, the future application of the new technology may be limited by its large number of antennas, receivers, and correlators. In order to reduce significantly the complexity of the on-board hardware requirements, a novel method based on the recently developed theory of compressive sensing (CS) is proposed in this paper. Due to the fact that the brightness temperature distributions of the Earth have a sparse representation in some proper transform domain -for example, in terms of spatial finite-differences or their wavelet coefficients, we use the CS approach to significantly undersample the visibility function. Thus the number of antennas, receivers, and correlators can be further reduced than those based on the traditional methods that obey the Shannon/Nyquist sampling theorem. The reconstruction is performed by minimizing the 1 norm of a transformed image. The effectiveness of the proposed approach is validated by numerical simulations using the image corresponding to AMSU-A over the Pacific.

show abstract

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Ground-based microwave radiometer is the main device to remotely sense atmosphere passively which can detect the water vapor density, temperature, integral water vapor, etc.. For measurement in very dry conditions, typically in Arctic, several high frequency channels around water vapor line are added, and a 1-D variational retrieval technique has been developed [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A Dual-Frequency Method of Eliminating Liquid Water Radiation to Remotely Sense Cloudy Atmosphere by Ground-Based Microwave Radiometer

Li¹,

Guo²,

Lin³

et al. 2013

PIER

View full text Add to dashboard Cite

Abstract-Ground-based microwave radiometer is the main device to remotely sense atmosphere passively which can detect the water vapor density, temperature, integral water vapor, etc. Because of the influence of cloud liquid water on the brightness temperature measured by microwave radiometer, the cloud needs to be modeled to retrieve the parameters of cloudy atmosphere. However, the difference between the cloud model and actual cloud may bring on some error in retrieval. Based on the relation between absorption coefficient of liquid water and frequency, a dual-frequency method of eliminating liquid water radiation which is not based on modeling cloud is put forward to retrieve the parameters of cloudy atmosphere. Historical radiosonde data are employed in the calculation of retrieval coefficients to profile the water vapor of cloudy atmosphere. The simulation and experiment results show that the dual-frequency method can eliminate the radiation of liquid water effectively and has a higher precision than conventional method. The integral water vapor in cloudy atmosphere is also retrieved by the dual-frequency method, and the precision is comparable with the method of modeling cloud.

show abstract

Enhancement of a Microwave Radiometry Imaging System's Performance Using Left Handed Materials

Cited by 10 publications

References 17 publications

An Integrated Simulation Approach and Experimental Research on Microwave Induced Thermo-Acoustic Tomography System

An Integrated Simulation Approach and Experimental Research on Microwave Induced Thermo-Acoustic Tomography System

A Compressive Sensing Approach for Synthetic Aperture Imaging Radiometers

A Dual-Frequency Method of Eliminating Liquid Water Radiation to Remotely Sense Cloudy Atmosphere by Ground-Based Microwave Radiometer

Contact Info

Product

Resources

About