Algorithm of digital demodulation and filtering in MRI spectrometers / 中国医疗器械杂志
Chinese Journal of Medical Instrumentation
;
(6): 271-274, 2008.
Artigo
em Chinês
| WPRIM
| ID: wpr-309598
ABSTRACT
In the design of RF receiver of the digital MRI spectrometer console, a digital demodulation and filtering algorithm is presented in this thesis. The MR signals are firstly converted to digital signals by the A/D converter, and then quadrature-demodulated from high frequency carrier wave. The CIC filter, half-band filter and linear phase FIR filter are designed to process the cascaded filtering and decimation of the demodulated signals. This method achieves a satisfying processing speed and filtering effect, and also reduces the data size obviously. The experiment based on the permanent magnetism resonance imaging system proves its effectiveness and practicability.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Ondas de Rádio
/
Algoritmos
/
Processamento de Sinais Assistido por Computador
/
Software
/
Imageamento por Ressonância Magnética
/
Métodos
Tipo de estudo:
Estudo prognóstico
Idioma:
Chinês
Revista:
Chinese Journal of Medical Instrumentation
Ano de publicação:
2008
Tipo de documento:
Artigo
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