Accession Number : AD1002542


Title :   RF Magnetic Field Uniformity of Rectangular Planar Coils for Resonance Imaging


Descriptive Note : Technical Report,11 Jan 2016,04 Feb 2016


Corporate Author : US Army RDECOM-ARDEC Picatinny Arsenal United States


Personal Author(s) : Burke,James E ; Wooding,Jamie


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1002542.pdf


Report Date : 04 Feb 2016


Pagination or Media Count : 4


Abstract : In Nuclear Quadrupole Resonance, the magnitude of the RF magnetic field coupling into a material with a quadrupole moment, determines the detected NQR signal strength from the material. In this paper, two rectangular planar coils are tuned to 28.1MHz resonant frequency of KCLO3 material and matched at 50 ohm input impedance. One planar coil is a one turn 32mm x 135mm rectangular coil, and the other is a rectangular coil with square-shaped overlapping turns along the 135mm length of the coil. This paper compares these two coils to determine which has a more uniform magnetic field. The NQR signal strength at different positions along the length of the coils determine the uniformity of the magnetic field induced. The results of this paper determine the type of rectangular coil to be used in a grid array of coils for quadrupole resonance imaging, which can also be applied to Magnetic Resonance Imaging (MRI).


Descriptors :   coils , magnetic fields , radiofrequency pulses , coupling(interaction) , signals , resonance


Distribution Statement : APPROVED FOR PUBLIC RELEASE