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.
Article
em Zh
| WPRIM
| ID: wpr-309598
Biblioteca responsável:
WPRO
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:
1
Índice:
WPRIM
Assunto principal:
Ondas de Rádio
/
Algoritmos
/
Processamento de Sinais Assistido por Computador
/
Software
/
Imageamento por Ressonância Magnética
/
Métodos
Tipo de estudo:
Prognostic_studies
Idioma:
Zh
Revista:
Chinese Journal of Medical Instrumentation
Ano de publicação:
2008
Tipo de documento:
Article