Three-Dimensional Near-Field Microwave Holography Using Reflected and Transmitted Signals

Amineh, Reza K.; Ravan, Maryam; Khalatpour, Ali; Nikolova, Natalia K.

doi:10.1109/tap.2011.2165496

Cited by 91 publications

(105 citation statements)

References 34 publications

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“…5 Further improvements to this algorithm have been made by taking account the amplitude decay 22 and using transmitted signals. 23 The microwave holographic technique was also applied to tissue imaging for medical purpose in recent years. [22][23][24] Now, we present the detailed process of microwave holographic technology to reconstruct the imaging recorded [This article is copyrighted as indicated in the article.…”

Section: Resultsmentioning

confidence: 99%

Microwave holography using a magnetic tunnel junction based spintronic microwave sensor

Gui

Bai

et al. 2015

Journal of Applied Physics

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In this work, a spintronic sensor based microwave holographic imaging system is developed, demonstrating the feasibility of microwave holographic imaging applications using a spintronic microwave sensor. The high sensitivity of the microwave phase measurement allows the coherent imaging of the target reconstructed in noise environments. Adapting the broadband measurement, not only the shape but also the distance of target can be determined, which implies that a three-dimensional imaging is achievable using a spintronic device.

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Section: Resultsmentioning

confidence: 99%

Microwave holography using a magnetic tunnel junction based spintronic microwave sensor

Gui

Bai

et al. 2015

Journal of Applied Physics

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“…The far-field HMI technique is very different from various existing near-field microwave holography techniques [18][19][20][21]: (1) The far-field HMI technique uses physical displacement (scan of the distance) between the antenna array plane and the imaged object over a specified range (vertical) to obtain depth information from sequenced 2-D images, which is very different from holography system in [18,19] that is fixed along a range and uses ultra-wideband information to attain depth resolution. Furthermore, the scattered field formulation used in our paper is subject to a far-field approximation but not subject to a linear-Born approximation.…”

Section: Discussionmentioning

confidence: 99%

“…Tomography [13][14][15][16][17] reconstructs a map of the electrical properties in the breast using measurements of energy transmitted through the breast. Microwave holographic based techniques [18][19][20][21] do not require expensive ultra-high speed electronics as narrow-band signals can be converted to the baseband for digitization at a slower rate, thereby enabling imaging at significantly lower cost [22]. Microwave holographic methods use both magnitude and phase information in an inversion process, which reconstructs the target reflectivity as a function of position [23].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Far-Field Holographic Microwave Imaging: An Experimental Investigation of Dielectric Object

Wang

Simpkin²,

Al-Jumaily³

2014

PIER B

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Abstract-This work presents experimental investigations of three-dimensional (3-D) far-field holographic microwave imaging (HMI) method for diagnosing inclusions within dielectric objects, and in particular, it relates to electromagnetic imaging to reconstruct dielectric properties of inhomogeneous, lossy bodies with arbitrary shape. The apparatus is designed for operation at a single frequency of 12.6 GHz. 16 antennas are located on a 2-D array plane which is placed under the object in the far-field region, with air in the space between the antenna array and the object. Experimental results indicate that the 3-D HMI system has the ability to produce a 3-D image of multimedia dielectric object and detect small inclusions embedded within an object. The invention has potential application to tissue imaging.

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“…In tomographic methods, the goal is to reconstruct a dielectric profile of the breast tissues [3]. In microwave holography, coherent back-scattered signals acquired on apertures are used to reconstruct the target [4]. Alternatively, radar methods attempt to map regions of dielectric scattering, from which the tissue type can be inferred [3].…”

Section: Introductionmentioning

confidence: 99%

Time-Domain Microwave Radar Applied to Breast Imaging: Measurement Reliability in a Clinical Setting

Porter¹,

Santorelli²,

Popović³

2014

PIER

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Abstract-This work presents an evaluation of the measurement challenges in clinical testing of our microwave breast cancer screening system. The time-domain radar system contains a multistatic 16-antenna hemi-spherical array operating in the 2-4 GHz frequency range. We investigate, for the first time with such a system in clinical trials, the repeatability of measurements and its effect on image reconstruction. We record vertical and horizontal measurement uncertainties under different scenarios and verify using previously introduced compensation methods that they can be successfully reduced to an acceptable level from the standpoint of image reconstruction. We also examine how placement of an immersion medium can affect collected breast scan data. Finally, we probe the repeatability and consistency of measurements with patients. With the goal of confirming the feasibility of frequent breast health monitoring, with our system, we obtain a total of 342 breast scans collected over 57 patient visits to determine how much scan data varies when there are no changes in between scans, and how much it varies when the patient is repositioned in the system. We confirm that, by taking care in patient positioning in the system and with respect to the immersion medium, the measurement repeatability is high.

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Three-Dimensional Near-Field Microwave Holography Using Reflected and Transmitted Signals

Cited by 91 publications

References 34 publications

Microwave holography using a magnetic tunnel junction based spintronic microwave sensor

Microwave holography using a magnetic tunnel junction based spintronic microwave sensor

Three-Dimensional Far-Field Holographic Microwave Imaging: An Experimental Investigation of Dielectric Object

Time-Domain Microwave Radar Applied to Breast Imaging: Measurement Reliability in a Clinical Setting

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