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Design of a Four-Coil Surface Array for In Vivo Magnetic Resonance Microscopy at 600 MHz

Summary: Design of a Four-Coil Surface Array for In Vivo
Magnetic Resonance Microscopy at 600 MHz
Department of Electrical and Computer Engineering, Beckman Institute for Advanced Science and Technology,
University of Illinois at Urbana-Champaign, 4221 Beckman Institute, 405 North Mathews, Urbana, Illinois 61801
ABSTRACT: The design and construction of a four-coil surface array for operation at 600
MHz is described. A capacitor-segmented single loop is used as the transmit coil. Novel
features of the coil design include the use of varactor diodes in the transmit and receive
coils for coil isolation and impedance matching. Isolation of greater than 20 dB between
individual coils in the array was achieved without the use of low/high input impedance
preamplifiers, and greater than 25 dB isolation was realized between the transmit coil and
each element of the array. High-resolution in vivo images of mouse spinal cord using this
array are shown. 2005 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson
Engineering) 24B: 614, 2005
KEY WORDS: decoupled array; isolation network; surface coils; magnetic resonance im-
Integration of large arrays of mutually decoupled coils
(1, 2) into commercial clinical magnetic resonance
imaging systems has contributed to significant in-


Source: Andrews, Anne M. - Huck Institutes of the Life Sciences, Pennsylvania State University


Collections: Biology and Medicine