Transverse Hadamard spectroscopic imaging technique

A new Hadamard spectroscopic imaging (HSI) technique based on transverse magnetization encoding is presented and tested experimentally. Using average Hamiltonian theory, we have defined the conditions under which a proper combination of gradients and RF functions can produce, as a good approximation, a plane rotation whose flip angle is the Fourier transform of the RF function even in the presence of chemical-shift and B0 inhomogeneity. Hence, the generation of RF pulses to perform any order HSI is simplified.