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Real-time Interactive Control of Magnetic Resonance Imaging System Using High-speed Digital Signal Processors  

안창범 (광운대학교 전기공학과)
김휴정 (광운대학교 전기공학과)
이흥규 ((주)아이솔테크놀로지)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.40, no.5, 2003 , pp. 341-349 More about this Journal
Abstract
A real time interactive controller (spectrometer) for magnetic resonance imaging (MRI) system has been developed using high speed digital signal processors (DSP). The controller generates radio frequency (rf) waveforms and audio frequency gradient waveforms and controls multiple receivers for data acquisition. By employing DSPs having high computational power (e.g., TMS320C670l) real time generation of complicated gradient waveforms and interactive control of selection planes are possible, which are important features in real-time imaging of moving organs, e.g., cardiac imaging. The spectrometer was successfully implemented at a 1.5 Tesla whole body MRI system for clinical application. Performance of the spectrometer is verified by various experiments including high- speed imaging such as fast spin echo (FSE) and echo planar imaging (EPI). These high-speed imaging techniques reduce measurement time, however, usually intensify artifact if there is any systematic phase error or jitter in the synchronization between the transmitter, receiver, and gradients.
Keywords
Spectrometer; Digital signal processor (DSP); Magnetic resonance imaging (MRI); Gradient; High speed imaging;
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