Method and apparatus for reduction of nyquist ghosts in medical magnetic resonance imaging

A magnetic resonance tomography apparatus comprising:

• a computer having access to at least one progression curve for an EPI magnetic resonance imaging pulse sequence, said EPI sequence comprising a readout gradient pulse train defined as to pulse shape, pulse amplitude and pulse duration, under which echo signals are respectively readout, said echo signals having echo numbers respectively associated therewith that increase with increasing time, said at least one progressive curve representing at least one characterizing quantity of the respective echo signals dependent on the echo number thereof;
• a magnetic resonance scanner adapted to interact with an examination subject;
• a sequence controller that operates said magnetic resonance scanner to subject the examination subject to a diagnostic EPI pulse sequence comprising a readout gradient pulse train comprised of gradient pulses of alternating polarity with a simultaneously activated phase coding gradient, to acquire diagnostic phase-coded magnetic resonance data;
• and
• said computer correcting said phase-coded diagnostic data using said at least one progression curve, to obtain a corrected diagnostic data set, and Fourier transforming said corrected diagnostic data set to obtain an image data set with reduced Nyquist ghost artifacts.