Patent ID: 7804299

Claim:
A method for producing a diffusion-weighted image with a magnetic resonance imaging (MRI) system, the steps comprising: a) performing a preparation pulse sequence with the MRI system that diffusion weights longitudinal magnetization in a subject, the preparation pulse sequence including: a)i) applying a radio frequency (RF) excitation pulse to produce transverse spin magnetization; a)ii) applying a first moment nulled diffusion weighting gradient waveform to diffusion weight the transverse spin magnetization; a)iii) applying an RF excitation pulse to produce diffusion-weighted longitudinal spin magnetization from the diffusion weighted transverse magnetization; and a)iv) applying an RF refocusing pulse such that the diffusion weighted transverse magnetization is refocused when the RF excitation pulse is produced in step a)iii); b) performing an imaging pulse sequence following step a); c) repeating steps a) and b) as necessary to acquire a set of data from which an image can be reconstructed; and d) reconstructing a diffusion-weighted image from the acquired set of data.