Abstract: In a method and apparatus for detection and spectral editing in MR spectroscopy by polarization transfer in which the high spin population difference of two or more energy levels of a particular nuclear spin system is transferred to the energy levels of an other nuclear spin system with lower spin population difference, all RF pulses to be irradiated are irradiated sequentially, i.e. with defined time interval to each other, so that at no time of the sequence are different RF pulses irradiated concurrently in an overlapping manner. The sequential succession of the RF pulses causes the polarization transfer between the two spin systems of atomic nuclei involved. The sequence of the RF pulses in each domain of the respective nuclei is completely symmetric.

Abstract: In a method and apparatus for detection and spectral editing in MR spectroscopy by polarization transfer in which the high spin population difference of two or more energy levels of a particular nuclear spin system is transferred to the energy levels of an other nuclear spin system with lower spin population difference, all RF pulses to be irradiated are irradiated sequentially, i.e. with defined time interval to each other, so that at no time of the sequence are different RF pulses irradiated concurrently in an overlapping manner. The sequential succession of the RF pulses causes the polarization transfer between the two spin systems of atomic nuclei involved. The sequence of the RF pulses in each domain of the respective nuclei is completely symmetric.

Abstract: Polarization transfer pulse sequences in NMR, such as a DEPT pulse sequence, in combination with a volume selection (for example, VSE) in a body have been described. Therein first volume selection is performed in the body by means of VSE, after which the body is exposed to the DEPT pulse sequence. According to the present invention it is proposed to make the volume selection coincide with the polarization transfer pulse sequence, so that inter alia the pulse sequence is less susceptible to imperfections of rf electromagnetic pulses.