An apparatus includes a housing, an ultrasound transducer in the housing and positioned to direct ultrasound signals to a volume of a subject and detect reflected ultrasound signals from the volume of the subject, a magnet arranged in the housing and positioned such that a magnetic field of the magnet penetrates the volume of the subject, a radiofrequency (RF) system to perturb a nuclear spin polarization of nuclei in the volume of the subject and detect radio waves emitted from the volume, and an electronic controller programmed to compile an image of at least a first region of the subject based on the detected ultrasound signals and compile a magnetic resonance image of at least a second region of the subject based on the detected radio waves.
