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
in Chinese
| 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Radio Waves
/
Algorithms
/
Signal Processing, Computer-Assisted
/
Software
/
Magnetic Resonance Imaging
/
Methods
Type of study:
Prognostic study
Language:
Chinese
Journal:
Chinese Journal of Medical Instrumentation
Year:
2008
Type:
Article
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