Ancillary Diagnostic Imaging Businesses that Key Healthcare Business Brokers services offer ancillary radiology and medical imaging services in outpatient and mobile service settings. These services help patients save costs by reducing overhead cost to the provider which is then passed along to the patient. Different types of medical imaging include MRI, ultrasound, PET/CT scans, x-rays, myelograms, breast ultrasound, breast MRI, screening mammograms, 3D mammograms and 3D imaging, thermography services, and DEXA bone density scans.