A GENERAL COMPUTER-PROGRAM FOR CALCULATING SELECTIVITY PROFILES IN NMR-SPECTROSCOPY

The computer program presented in this paper yields excitation profile s (the amplitude of the three magnetization components as a function o f the resonance frequency) for virtually any pulse sequence employing hard, soft or field gradient pulses. All instrumental parameters (tran smitter phase, rf field amplitude, phase cycling and even radio-freque ncy field homogeneity) and relaxation times can be taken into account. The efficiency of the program is enhanced by the use of an analytical solution to the Bloch equations. Some experimental excitation profile s are provided along with the corresponding simulations. Further simul ations demonstrate the capabilities of the program.