An apparatus and method for reconstructing multi-spectral 3D MR images includes a magnetic resonance apparatus that includes an MRI system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images. The dispenser comprises a chamber to receive a compound. An infusion tube extends through the probe body for introducing fluid into the ablation electrode.