1. A system for detecting malignant lymph nodes using an MR imaging device, comprising: an MR imaging device for, in the absence of a contrast agent, acquiring in a patient anatomical volume of interest including lymph nodes, (a) a first image using a variable flip angle, lymph node enhancing, MR image acquisition process, (b) a second image using a susceptibility weighting imaging acquisition process and (c) a third image using a diffusion weighting imaging acquisition process and in the presence of a contrast agent absorbed by benign lymph nodes, acquiring in said patient anatomical volume of interest, (d) a fourth image using a susceptibility weighting imaging acquisition process; and a display processor for processing data representing the first, second, third and fourth images for display on a reproduction device.