Hot off the press: News and fascinating studies on stroke from Medscape. Mobile stroke units are helping save lives. (360 degree image.) Ambulances outfitted with a CT scanner, radiologic technician and a stroke fellowship trained nurse practitioner or physician in addition to the EMT (emergency medial technician) driver and paramedic, relay the images in real time to a radiologist or neouroimaging neurologist. The images are evaluated for bleeding or no, yes or no to tPA