Reconstruction of all offresonance states in DYPR bSSFP using an elliptical signal model

摘要

An elliptical signal model was proposed to describe the signal behavior of the bSSFP signal with changing offresonance(1). The model can be fitted to data from phase-cycled bSSFP acquisitions and was so far utilized for the reconstruction of banding free images (2), estimating underlying tissue parameters(3) and to create artificial contrasts based on these parameters(4). All procedures are based on the acquisition of multiple phase-cycled measurements, which significantly increases scan time. As shown before a frequency-modulated acquisition can acquire the same information in a single measurement(5) and a multifrequency reconstruction enables banding free images with high SNR from such data(6). Here, the elliptical signal model is employed to reconstruct multiple offresonance images from one single frequency-modulated acquisition.