Patent ID: 6975896

Claim:
A method of magnetic resonance comprising: disposing a plurality of fiducial markers on at least one of a subject and a medical accessory, the fiducial markers including dipoles having a first resonance frequency different from a proton resonance frequency; disposing a subject in an imaging region of a main magnetic field; exciting magnetic resonance in both dipoles of the fiducial markers and dipoles in at least a portion of the subject concurrently with common radio frequency pulses, the dipoles of the subject having a second resonance frequency that is the proton resonance frequency; spatially encoding the magnetic resonance with magnetic field gradients which spread the first and second resonance frequencies over spatially dependent first and second frequency spectra, the first and second spectra being separated from each other; concurrently receiving magnetic resonance signals from resonating dipoles of the subject and the fiducial markers; separating the magnetic resonance signals based on frequency spectra; separately reconstructing: an image representation of the fiducial markers from the first spectra resonance signals; and, an image representation of the at least a portion of the subject from the second spectra resonance signals.