Abstract #1473
An easily controllable spread spectrum using chirp radio frequency pulse and its application in compressed sensing MRI
Xiaobo Qu 1 , Ying Chen 1 , Xiaoxing Zhuang 1 , Zhiyu Yan 1 , Di Guo 2 , and Zhong Chen 1
1
Department of Electronic Science, Xiamen
University, Xiamen, Fujian, China,
2
School
of Computer and Information Engineering, Xiamen
University of Technology, Xiamen, Fujian, China
To accelerate imaging, compressed sensing MRI (CS-MRI)
suggests performing randomly undersampling to reduce the
coherence between the encoding matrix and the sparsity
bases. Spread spectrum (SS) is recently introduced to
improves the reconstruction by reducing this coherence.
But SS is achieved via a second order shim coil which
limits modulation intensity and is not convenient to be
operated. In this work, we propose a chirp radio
frequency (RF) pulses to easily control the spread
intensity by choosing a proper bandwidth and apply in
CS. Simulation on the sampled data implies that the
reconstruction error reduces if a proper bandwidth is
provided.
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