A quadrature coil for the adult human head

A quadrature head coil suitable for NMR imaging up to 80 MHz is described. Based on the well known design of Alderman and Grant, the four-quadrant coil has the attributes of distributed tuning capacitance and electrostatic guard rings, while maintaining the √2 improvement in sensitivity and. √2 impr...

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Bibliographic Details
Published in:Journal of magnetic resonance (1969) 1986, Vol.69 (2), p.236-242
Main Authors: Sank, V.J, Chen, C.-N, Hoult, D.I
Format: Article
Language:English
Subjects:
Applied sciences
Biological and medical sciences
Exact sciences and technology
Investigative techniques, diagnostic techniques (general aspects)
Medical sciences
Nervous system
Other techniques and industries
Radiodiagnosis. Nmr imagery. Nmr spectrometry
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Description
Summary:A quadrature head coil suitable for NMR imaging up to 80 MHz is described. Based on the well known design of Alderman and Grant, the four-quadrant coil has the attributes of distributed tuning capacitance and electrostatic guard rings, while maintaining the √2 improvement in sensitivity and. √2 improvement in effective B 1 inherent in the quadrature design. The appropriate phase shifts for transmission and reception are generated with the aid of a coaxial cable ring hybrid, which is simple in design and affords a considerable degree of isolation between transmitter and receiver.
ISSN:0022-2364
1090-7807
1557-8968
DOI:10.1016/0022-2364(86)90075-2