PROJECTION-RECONSTRUCTION METHODS - FAST IMAGING SEQUENCES AND DATA-PROCESSING

New, rapid two- and three-dimensional imaging sequences based on stead y-state gradient echoes and projection-reconstruction (PR) techniques are proposed. Quantitative studies show that fast PR sequences and cla ssical, fast gradient-echo Fourier transform sequences lead to identic al contrasts. In order to minimize inhomogeneity effects, a particular focus has been placed on echo-time reduction. The use of a weighting window permits one to acquire severely truncated echoes; partial k-spa ce scanning may be considered.