The use of wiener deconvolution (an optimal filter) in nuclear magnetic resonance imaging

A computer software technique has been developed and employed to insert a modified‐Wiener‐deconvolution filter (an optimal filter) immediately following the quadrate detector of a magnetic resonance imager. The purpose of this effort is to try to suppress the undesirable effect of the noise found in the magnetic resonance imaging receiving antenna. This technique convolves the sampled real and imaginary signals taken directly from the antenna quadrature detector with a transfer function which is expressed in terms of the power spectrum of the measured signal with noise and the measured power spectrum of the noise, alone. The latter factor is measured during the dummy cycles which precede a normal scan sequence. Results are presented using data taken with a commercially available phantom.