Maximizing signal-to-noise ratio in the presence of coil coupling.
J Magn Reson B
; 111(3): 230-5, 1996 Jun.
Article
em En
| MEDLINE
| ID: mdl-8661287
ABSTRACT
Crosstalk due to coupling produces noise correlation between receiver coils. It has been stated that this correlation reduces the signal-to-noise ratio obtainable from combining signals from the coils. In this paper, it is shown that the effects of crosstalk on the signal-to-noise ratio may in theory be eliminated by properly combining signals. Equations are derived which show how the signals from two coils should be combined in the presence of crosstalk in order to obtain the same signal-to-noise ratio as in an ideal case of no crosstalk. The deviation from optimum signal-to-noise ratio due to imperfect circuits and amplifiers is discussed. An experimental technique for achieving the proper combination of signals is presented.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Imageamento por Ressonância Magnética
/
Campos Eletromagnéticos
Limite:
Humans
Idioma:
En
Revista:
J Magn Reson B
Assunto da revista:
BIOLOGIA
/
BIOQUIMICA
/
DIAGNOSTICO POR IMAGEM
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Estados Unidos