Description DMS Imaging, a subsidiary of DMS Health Group, provides mobile diagnostic medical imaging services to health care facilities in about 40 states. The company offers MRI, computerized tomography (CT), PET, nuclear medicine, mammography, ultrasound, and bone density testing services. DMS Imaging has some 200 mobile units which serve penitentiary systems, nursing homes, and other long-term care facilities, as well as rural hospitals that cannot invest in maintaining such equipment.