Chemical-shift imaging in micro- and nano-MRI

We demonstrate chemical-shift imaging of solids with a spatial resolution of about 1 mu m using magnetic resonance force microscopy. Images with two spatial dimensions and one spectral dimension were recorded and an extension to three spatial dimensions and several spectral dimensions is possible. To reduce the measurement time multiplexing schemes are used for all dimensions (by either a Fourier or a Hadamard method) and quadrature detection is introduced for the directly acquired spatial dimension, in combination with Hadamard encoding.