“I didn’t think, I investigated” – with these words in 1895, Wilhelm Roentgen acknowledged the discovery of a major landmark in modern life: the x-ray. The x-ray emerged from the laboratory and into widespread use in a startlingly brief leap. Within a year of its discovery, the use of x-rays in diagnosis and therapy was an established part of the medical scene. Further progress led to the development of advanced medical imaging technology including ultrasound, CAT, MRI, SPECT and PET. The x-ray’s discovery, its societal impact and the further progress of medical imaging are the subjects of “Milestone in Medical Imaging: From X-Ray to Nuclear Medicine,” at the International Museum of Surgical Science.