Dielectric Properties of Materials

Bain, A. K.; Chand, Prem

doi:10.1002/9783527805310.ch1

Cited by 6 publications

(6 citation statements)

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“…The most important of these effects is the polarization of matter. This occurs when internal charge in the sample is altered due to an external electric field 60 . Biological tissues are inherently unique in their dielectric properties.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

“…All materials have an absolute measure of permittivity (ε), and also a relative permittivity (εr) which is measured relative to that of vacuum (ε₀=8.854 × 10−12 F/m). Dielectric materials are those which can store energy after an external electric field is applied, leading to small changes or displacement in atoms or orientations to become 'polarized' 60 . The extent of the polarizability is what the dielectric constant represents.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

“…Coulomb metres) due to the electronegativity of the oxygen atom relative to the hydrogen and their asymmetrical geometry 60,63 .…”

Section: Dielectric Propertiesmentioning

confidence: 99%

“…There are four main mechanisms that contribute to the level of polarizability: 1) Electronic, 2) Ionic, 3) Orientation and 4) Interfacial 60 . The first mechanism, electronic polarizability, refers to the displacement of opposing charges in the dielectric materials.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

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Artificial Amniotic Fluid for NMR Spectroscopy Studies

Naila

2023

Preprint

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<p>Amniocentesis is the process of retrieving the nutrient-rich amniotic fluid (AF) that encompasses the growing fetus in order to diagnose fetal diseases and developmental disorders. Currently, it is only performed on pregnant persons at-risk, and is invasive with potential for infection and in some cases, miscarriage. A non-invasive alternative is needed and could be developed using magnetic resonance spectroscopy (MRS). To develop such MRS sequences, ample testing and training are needed and could be most efficiently conducted on a phantom. We propose a protocol for synthetic AF that could be used for creating such AF phantom for MRS testing and optimization. The proposed AF is validated using Nuclear Magnetic Resonance (NMR) proving it produces spectra comparable to those in the literature. The results from this study can aid in developing a non-invasive fetal diagnostic tool to replace amniocentesis.</p>

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Section: Dielectric Propertiesmentioning

confidence: 99%

Section: Dielectric Propertiesmentioning

confidence: 99%

“…Coulomb metres) due to the electronegativity of the oxygen atom relative to the hydrogen and their asymmetrical geometry 60,63 .…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Section: Dielectric Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Artificial Amniotic Fluid for NMR Spectroscopy Studies

Naila

2023

Preprint

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“…Therefore, selecting phantom materials is also dictated by the final desired dielectric properties. Dielectric properties are molecular properties which are capable of storing and dissipating electromagnetic energy throughout the material when an external electric field is applied [38], [39].…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Development of Anthropomorphic Fetal MRI phantom

Cho

2023

Preprint

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<p>The accuracy of MRI in obstetric settings is often limited by motion artifacts from frequent and spontaneous fetal gross body movement. Development of new MR sequences that avoid these artifacts pivots on extensive testing. Development of an MRI phantom that simulates fetal tissue properties, anatomical structures, and gross body motion will allow for rapid testing, along with reproducible data that will shorten the development time of such MR sequences. This thesis proposes an anthropomorphic MRI phantom of fetal gross body and brain that simulates MR imaging properties, dielectric properties, and the anatomical shape. Various experiments, including relaxometry, dielectric, and mechanical tests, were performed to determine the most appropriate tissue-mimicking material for simulating properties of tissues of interest. For simulating the anatomical shape, MRI data of a 35-week fetus was used to reconstruct a 3D model applied for designing and 3D printing of the phantom molds.</p>

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Characterization of micro-ZnO/PDMS composite structured via dielectrophoresis – Toward medical application

Zhang

Nguyen

et al. 2021

Materials & Design

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Dielectric Properties of Materials

Cited by 6 publications

References 0 publications

Artificial Amniotic Fluid for NMR Spectroscopy Studies

Artificial Amniotic Fluid for NMR Spectroscopy Studies

Development of Anthropomorphic Fetal MRI phantom

Characterization of micro-ZnO/PDMS composite structured via dielectrophoresis – Toward medical application

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