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Background: Several variants of a phase-based method for B1 mapping or transmitter calibration have been proposed for hyperpolarized-gas (HPG) lung imaging [13]. For transmitter calibration, the signal is typically integrated over a thick slice through the lung, and thus robust performance in the presence of a range of resonance offsets is more critical(More)
To perfectly detect the amplitude for high frequency harmonic and inter-harmonic of small signal, separate the close frequency and improve accuracy of the detection time in dynamic system, a harmonic and inter-harmonic detection method based on synchrosqueezed wavelet transforms (SST) is proposed. In order to evaluate the effectiveness of SST, the(More)
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