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A scanning tunneling microscope (STM) is an instrument for imaging surfaces at the atomic level.Its development in 1981 earned its inventors, Gerd Binnig and Heinrich Rohrer (at IBM Zuerich), zÃ¼rich The Nobel prize In physics in. 1986he resolution of an image is limited by the radius of curvature of the scanning tip of the STM. Additionally, image artifacts can occur if the tip has two tips at the end rather than a single atom; this leads to âdouble-tip imaging,â a situation in which both tips contribute to the tunneling.
Continue reading the main story. Robert S. Ledley, a dentist turned biomedical researcher and computing trailblazer who invented the first CT scanner capable of producing cross-sectional images of any part of the human body, died on Tuesday in Kensington, Md. He was 86.The cause was Alzheimerâs disease, his son Fred said.efore the advent of CT scanning in the early 1970s, radiologists had limited tools. CT scanning gave them not only a far higher resolution than traditional X-rays but also three-dimensional, cross-sectional images to work with, significantly reducing the need for exploratory surgery and its attendant risks.