X-ray image of a rose, below, that was created by Dain Tasker in 1936. Tasker was the chief radiologist at Wilshire Hospital in Los Angeles, California, in the early days of radiology. He used fine-focus X-ray tubes to create ghostly black-and-white prints of flowers on X-ray film. The images were a hit in photography circles in the late 1930s and were published in high-profile art magazines, although his work fell into obscurity and was only rediscovered relatively recently.