| Title | : | Microwave Imaging of Biological Structures: Application to Breast Cancer Detection and Imaging of the Knee |
| Author | : | Sara Marina Salvador |
| Language | : | en |
| Rating | : | 4.90 out of 5 stars |
| Type | : | PDF, ePub, Kindle |
| Uploaded | : | Apr 07, 2021 |
Read Online Microwave Imaging of Biological Structures: Application to Breast Cancer Detection and Imaging of the Knee - Sara Marina Salvador file in PDF
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Imaging utilizes finite difference time domain (fdtd) analysis for simulation of microwave and acoustic interaction with biological tissues, which is time-consuming due to complex grid-segmentation and numerous calculations, not straightforward due to no analytical.
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Scanning thermoacoustic tomography was explored in the microwave region of the electromagnetic spectrum. Short microwave pulses were used to induce acoustic waves by thermoelastic expansion in biological tissues. Cross sections of tissue samples were imaged by a linear scan of the samples while a focused ultrasonic transducer detected the time-resolved thermoacoustic signals.
Dec 12, 2014 researchers in new hampshire and canada describe microwave imaging system that promises better and cheaper breast images for cancer.
Microwave biological/cell detection has been demonstrated to be useful and promising in many medical applications due to its internal properties such as non-invasive, fast and label-free. However, the spatial work dimension, therefore the resolution, of the state-of-the-art electrical measurement and detection techniques is limited.
Apr 6, 2011 ongoing research in the field of microwave imaging of biological tissues, with major focus on the breast tumor detection application.
Keywords: dielectric properties, microwave imaging, electromagnetic waves, biological tissues. Introduction microwave imaging (mi) has been intensely studied for breast cancer detection over the past few decades [1-5]. Mi offers a promising complementary modality for breast imaging, which has potential for low-cost and pain-free breast.
Assumed permittivity profiles are generated for a simple circular phantom using the cst microwave studio software. Then, we reconstruct the permittivity profile of the object in matlab by using the data from cst microwave studio. The main work in this paper focuses on the realization of the inversion algorithm on three different circular phantoms.
Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 mhz and 300 ghz respectively. Different sources define different frequency ranges as microwaves; the above broad definition includes both uhf and ehf (millimeter wave) bands.
Microwaves are used for cooking, weather mapping, radar and satellite communications, as well as cellular phones, over-the-air television signals, gps navi microwaves are used for cooking, weather mapping, radar and satellite communications.
The goal with this work is to develop a microwave imaging system able to reconstruct quantitative images of a female breast. In the frame of this goal this licentiate thesis contains a brief review of the ongoing research in the field of microwave imaging of biological tissues, with the major focus on the breast tumor application.
We present tomographic imaging of biological tissues by use of microwave-induced acoustic signal. It was demonstrated that the acoustic signal was proportional to the intensity of the incident microwave and was related to the absorption property of microwave in the medium. Pulsed microwave radiation was used to illuminate the samples.
She has 8 years of research experience on the topic of microwave imaging, developing techniques to detect and classify breast cancer. She is the chair of cost action td1301 (microwave medical applications, mimed), and organises bi-annual meetings for over 200 research and medical participants from 29 countries.
Microwave imaging of biological tissue phantom in different frequency ranges abstract: in the present study the microwave images for the breast tissue phantom in different frequency ranges were obtained.
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Microwave imaging is a non-ionizing method which promises the ability of depth- scanning different dielectric bodies for biomedical applications. This method has been proved able to detect malignant tumors as the dielectric properties of these differ from other human tissues.
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Jan 9, 2019 microwave imaging represents a safe alternative to x-ray mammography for breast cancer screening.
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A microwave tomographic device including a single frequency three a microwave patch system to, inter alia, enable superficial imaging of biological systems.
Pulsed microwave with high excitation efficiency and deep penetra bility in biological tissues makes ta therapy a highly-efficient anti-tumor modality on the versatile platform. Overall, hsa-spio mediated mri and ta imaging would offer more comprehensive diagnostic information and enable.
For many microwave oven owners, the most adventurous cooking from scratch they'll ever do is microwave egg poaching. Interestingly enough, there was once a time—somewhere back in the distant '70s—when people were actually excited about cook.
A method and system for examining biological tissue includes the steps of radiating a tissue region with a plurality of microwave radiation pulses. The microwave pulses are swept across a range of microwave frequencies. In response to the swept frequency microwave pulses, the tissue region emits a plurality of thermoacoustic signals.
In microwave imaging of biological abnormalities such as skin cancer, detection of small tumors at the early stage of cancer is a very important and vital issue. In this paper, a microwave imaging system for nondestructive evaluation of biological tissues and biological abnormalities using a high-quality near-field probe is proposed.
Differences in microwave absorption rates in different tissues. 13,14 although microwave imaging also provides high contrast, it offers poor imaging resolution due to the long wavelengths of microwaves. Electromagnetic-energy absorption in biological tissue can be measured by a specific absorption rate(sar).
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Fluorescent silicon quantum dots (siqds) are facilely prepared via one-pot microwave-assisted synthesis. The as-prepared siqds feature excellent aqueous dispersibility, robust photo- and ph-stability, strong fluorescence, and favorable biocompatibility. Experiments show the siqds are superbly suitable for long-term immunofluorescent cellular imaging.
Abstract: in this paper we discuss the application of a broadband near-field scanning microwave microscope (smm) to the imaging of biological samples, in particular mouse myotubes c2c12 and rabbit sarcomeres, highlighting the intriguing possibilities of the technique, and discussing the challenges in data interpretation.
Jul 7, 2018 the early research on biological effects of microwave radiation between 1940- 1960 is reviewed by cook and colleagues and is available here.
We develop a new algorithm for ultra-wideband (uwb) microwave imaging of breast cancer tumors using bayesian inverse scattering. A key feature of the proposed algorithm is that constitutive propert.
A new technique for predicting the radially dependent permittivity in spherically shaped biological bodies is presented. It is based on a gener-alization of the well established fourier transform technique used for reconstructing permittivity profiles in planar stratified media in conjunction with a recently proposed renormalization technique.
Nov 10, 2020 keywords: requirements synthesis, microwave medical imaging, of biological organs and tissues, based on application of microwave sensing.
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Microwave imaging is a growing field, it is used in airports throughout the world in concert with other security measures such as metal detection and baggage x-ray. There are principally two type of imagers, passive and active.
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Microwave imaging at the nanoscale: quantitative measurements for semiconductor devices, materials science and bio-applications ferry kienberger, keysight labs austria this article will examine a novel high frequency electrical characterization microscope for the nano-scale imaging of semiconductor devices, advanced materials and biological.
In operation, microwave-induced thermoacoustic imaging involves the use of a short-pulsed microwave beam for irradiating the biological tissue of the breast. The breast tissue can absorb the microwave energy and, responsive to the absorption of the microwave energy, the breast tissue can emanate thermoacoustic waves through thermoelastic expansion.
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Using the microwave signal, impedance nanoscale imaging and doping profiling can be performed. Typically the smm is operated in reflection mode, whereby the ratio of the reflected and incident electromagnetic waves, the so called s11 scattering parameter, is measured by the vna at each pixel of the afm tip-sample contact point.
Abstract—ultra wideband (uwb) radar is a promising emerging technology for breast cancer detection based on the dielectric contrast between normal and tumor tissues at microwave frequencies. One of the most important considerations in developing a uwb imaging system is the configuration of the antenna array.
Microwave imaging is a non-ionizing method promising an ability of depth-scanning different biological bodies. The research in this area started in the late 70s and many contributions has been achieved by different groups until present, which has influenced and open up new possibilities of the technique.
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Abstract we present tomographic imaging of biological tissues by use of microwave-induced acoustic signal. It was demonstrated that the acoustic signal was proportional to the intensity of the incident microwave and was related to the absorption property of microwave in the medium. Pulsed microwave radiation was used to illuminate the samples.
Numerical study of microwave imaging and microwave‐induced thermoacoustic imaging utilizes finite difference time domain (fdtd) analysis for simulation of microwave and acoustic interaction with biological tissues, which is time consuming due to complex grid‐segmentation and numerous calculations, not straightforward due to no analytical.
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