Indianapolis Monthly Magazine - Indianapolis Restaurants, Shopping, Concerts, Events and more. EXTRA: Historical Medical Tools at IMHM - Thwaite's X-ray Machine, circa 1920s: Looking more like a fine piece of furniture than a medical device, this five-foot-high mahogany cylinder once sat in a dentist’s office. The lens can be raised and lowered, and there are foot pedals at the bottom to control the ray. A patient would have positioned his jaw against the machine and tested his luck. “At the time, X-ray technology was very overused and dangerous,” Nottage says. “It would have blasted the person with radiation.”