McCormick Place, Chicago's gargantuan expo complex, is one of the few place in the world large enough to host RSNA. When this group meets it's around 50,000 people. In addition, high tech medical equipment vendors are demonstrating and selling their latest and greatest medical imaging devices. My husband is a radiologist so we're here almost every year. He gets me a family pass to attend. I roam around looking at amazing machines about which I know very little. Still fascinating and the cameras love it.