Title :
A complete digital magnetic resonance imaging (MRI) system at low magnetic field (0.1 Tesla)
Author :
Raoof, Kosai ; Asfour, Aktham ; Fournier, Jean Marc
Author_Institution :
Lab. des Images et des Signaux, ENSIEG, St. Martin d´´Heres, France
fDate :
6/24/1905 12:00:00 AM
Abstract :
A new complete digital MRI system is developed to enhance the signal-to-noise ratio of the detected nuclear magnetic resonance (NMR) signals at low magnetic field (0.1 Tesla). The system is based on digital signal processor (DSP) that functions also as a controller and as an interface between the frequency translator and the digital synthesiser. The final system should be "portable" functioning at low voltage. It is a low cost system, and it can be dedicated to be used in a medical cabinets for examining small members of the human body. Such a system is also useful for quality control of agricultural and food products. The first results obtained with our system are presented in this paper. This includes NMR signal and images of 64×64 pixels.
Keywords :
NMR imaging; biomedical MRI; biomedical equipment; computerised instrumentation; digital signal processing chips; direct digital synthesis; frequency response; portable instruments; quality control; transient response; agricultural products; complete digital MRI system; decimation filter; digital signal processor controller; digital synthesiser; digital transmitter; enhanced signal-to-noise ratio; food products; frequency response; frequency translator; home-built system; impulse response; low cost system; low magnetic field; medical cabinets; nonlinear identification; portable functioning; quality control; Control system synthesis; Digital signal processing; Digital signal processors; Frequency synthesizers; Magnetic fields; Magnetic resonance imaging; Medical control systems; Nuclear magnetic resonance; Signal synthesis; Signal to noise ratio;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2002. IMTC/2002. Proceedings of the 19th IEEE
Print_ISBN :
0-7803-7218-2
DOI :
10.1109/IMTC.2002.1006864
