TITLE

The importance of Fabry–Pérot resonance and the role of shielding in subwavelength imaging performance of multiwire endoscopes

AUTHOR(S)
Rahman, Atiqur; Belov, Pavel A.; Silveirinha, Mário G.; Simovski, Constantin R.; Yang Hao; Parini, Clive
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/19/2009, Vol. 94 Issue 3, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Multiwire endoscopes may enable the manipulation of the electromagnetic field in the subwavelength scale. Recently, two different configurations of such devices have been proposed. Here, we compare the imaging performance of the imaging device introduced by Belov et al. [Phys. Rev. B 73, 033108 (2006)] and by Silveirinha et al. [Phys. Rev. B 75, 035108 (2007)] with the shielded multiwire endoscope described by Shvets et al. [Phys. Rev. Lett. 99, 053903 (2007)]. It is demonstrated that the performance of the latter may be strongly affected by the presence of a metallic shield around the endoscope and by poor matching between the endoscope and free space. Our results show that the metallic shield is completely unnecessary and emphasize the importance of tuning the length of the wires according to the Fabry–Pérot resonance condition, as proposed by Belov et al. [Phys. Rev. B 73, 033108 (2006)].
ACCESSION #
36339312

 

Related Articles

  • Shielding of the electromagnetic field of a coplanar waveguide by a metal film: Implications for broadband ferromagnetic resonance measurements. Bailleul, Matthieu // Applied Physics Letters;11/4/2013, Vol. 103 Issue 19, p192405 

    We show that the propagation of microwave fields along a planar transmission line is strongly modified when a conducting film is brought close to it. The effect is attributed to the shielding of the electrical and/or magnetic microwave fields which is shown to occur over a wide range of...

  • The effect of small variations in the magnetization curves of shielding material upon shielded fields. A. Kost; R. Jacobs; A. Hahn // European Physical Journal - Applied Physics;Aug2007, Vol. 39 Issue 2, p109 

    The shielding of strong electromagnetic fields at power frequency, performed by ferromagnetic plates, is often successfully modelled by the effective reluctivity. This method delivers good results for the RMS?value of the shielded field. The following paper shows that a small variation of the...

  • Risks and safety aspects related to PET/MR examinations. Brix, Gunnar; Nekolla, Elke A.; Nosske, Dietmar; Griebel, Jürgen // European Journal of Nuclear Medicine & Molecular Imaging;Mar2009 Supplement 1, Vol. 36, p131 

    The introduction of positron emission tomography (PET)/magnetic resonance (MR) systems into medical practice in the foreseeable future may not only lead to a gain in clinical diagnosis compared to PET/computed tomography (CT) imaging due to the superior soft-tissue contrast of the MR technology...

  • Comparison of left ventricular function assessment using phonocardiogram- and electrocardiogram-triggered 2D SSFP CINE MR imaging at 1.5 T and 3.0 T. Becker, Meike; Frauenrath, Tobias; Hezel, Fabian; Krombach, Gabriele A.; Kremer, Ute; Koppers, Benedikt; Butenweg, Christoph; Goemmel, Andreas; Utting, Jane; Schulz-Menger, Jeanette; Niendorf, Thoralf // European Radiology;Jun2010, Vol. 20 Issue 6, p1344 

    As high-field cardiac MRI (CMR) becomes more widespread the propensity of ECG to interference from electromagnetic fields (EMF) and to magneto-hydrodynamic (MHD) effects increases and with it the motivation for a CMR triggering alternative. This study explores the suitability of acoustic cardiac...

  • 7 Tesla compatible in-bore display for functional magnetic resonance imaging. Groebner, Jens; Berger, Moritz; Umathum, Reiner; Bock, Michael; Rauschenberg, Jaane // MAGMA: Magnetic Resonance Materials in Physics, Biology & Medici;Aug2013, Vol. 26 Issue 4, p371 

    Background and methods: A liquid crystal display was modified for use inside a 7 T MR magnet. SNR measurements were performed using different imaging sequences with the monitor absent, present, or activated. fMRI with a volunteer was conducted using a visual stimulus. Results and discussion: SNR...

  • Variation of MRI coil uniformity caused by μPET shieldings. Solis-Najera, S. E.; Tomasi, D.; Rodriguez, A. O. // AIP Conference Proceedings;Oct2012, Vol. 1494 Issue 1, p50 

    A single imaging modality cannot provide information on all aspects of structure and function. The combination of positron emission tomography and magnetic resonance imaging offers tantalizing opportunities, but also significant challenges. In particular, cross talk between the magnetic...

  • Photonics: Metamaterials to beat the static. Narimanov, Evgenii // Nature Materials;Apr2008, Vol. 7 Issue 4, p273 

    The article discusses superconducting meta-materials and their ability to control electromagnetic fields. It states that meta-materials incorporate metals to achieve such properties and rely on expulsion of magnetic field from the superconducting material. It mentions that superconducting...

  • Measuring of Shielding Effectiveness of Electromagnetic Field of Polystyrene in the Frequency Range from 1 GHz to 9 GHz. Pavlík, Marek; Kolcunová, Iraida; Zbojovský, Ján; Medved, Dušan // Power & Electrical Engineering;2014, Issue 32, p46 

    This paper deals with measurement of the shielding effectiveness against the electromagnetic field. Shielding effectiveness against the electromagnetic field characterizes property of material to penetrate the electromagnetic field. Measuring of shielding effectiveness was performed in the...

  • EMF Shielding Effectiveness of Knitted Fabrics of Metallized Threads. Grecka, Marianna; Artamonovs, Olegs; Blums, Juris; Ehrmann, Andrea; Vilumsone5, Ausma // Material Science (1691-3132);2014, Issue 9, p50 

    The aim of the study is to clarify the EMF shielding effectiveness (SE) of textiles with metallized yarns depending on their combinations and the position of samples with respect to the radiation source. For developing of the samples 3 types of metallized threads were used. Single and double...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics