An improved system and method (i.e. utility) for registration of medical
images is provided. The utility registers a previously obtained volume
onto an ultrasound volume during an ultrasound procedure to produce a
multimodal image. The multimodal image may be used to guide a medical
procedure, In one arrangement, the multimodal image includes MRI and/or
MRSI information presented in the framework of a TRUS image during a TRUS
procedure.