2-DIMENSIONAL ROTATING-FRAME NQR IMAGING

A new technique for two-dimensional rotating-frame nuclear-quadrupole- resonance imaging in powder or polycrystalline samples is reported. Th e bidimensional encoding procedure is based on the irradiation of the object by a sequence of pulsed orthogonal radiofrequency linear gradie nts. The spatial-density function, together with the spectroscopic inf ormation, is directly recorded in Cartesian coordinates. Several varia nts of the encoding procedure are discussed, and experimental results demonstrating the viability of the technique are given. (C) 1997 Acade mic Press.