1. A method for diagnosing tissue suspected of containing a lesion, comprising the steps of: selecting a shaped pulse sequence for each of waveform, phase and frequency components of an RF signal; generating an RF signal comprised of said selected waveform, amplitude and frequency shaped pulse sequences; receiving a series of echoes in response to said generated RF signal; producing an MR image of tissue suspected of containing a lesion from said series of received echoes; and diagnostically evaluating said tissue for the presence of lesions using said produced MR image.