Patent ID: 6111411
Filing Date: 2000-08-29
Classification: G01R

Abstract:
In an MR system, the combination comprisinga magnet for producing a polarizing magnetic field;an RF coil for producing transverse magnetization in a field of view in the polarizing magnetic field;a receiver for receiving an NMR signal resulting from the transverse magnetization and sampling the magnitude thereof to produce a k-space NMR data set;a gradient coil assembly for producing a readout gradient at a projection angle during the sampling of the received NMR signal;an array processor for Fourier transforming the k-space NMR data set to produce a projection data set at the projection angle;a pulse generator for operating the RF coil, receiver, gradient coil assembly and array processor to produce a plurality of projection data sets at a corresponding plurality of projection angles; anda processor for producing calibration data by summing data in the plurality of projection data sets.