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
Dans Chinois
| 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.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Ondes hertziennes
/
Algorithmes
/
Traitement du signal assisté par ordinateur
/
Logiciel
/
Imagerie par résonance magnétique
/
Méthodes
Type d'étude:
Étude pronostique
langue:
Chinois
Texte intégral:
Chinese Journal of Medical Instrumentation
Année:
2008
Type:
Article
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